CN111978078B - A kind of non-fragile rock slab and preparation method thereof - Google Patents

Abstract

The invention discloses a non-brittle cracked rock and a preparation method thereof, wherein the non-brittle cracked rock is prepared from the following raw materials in parts by weight: 40-55 parts of wollastonite, 25-40 parts of mullite, 15-20 parts of potassium feldspar, 10-20 parts of flint clay, 6-12 parts of calcined talc, 5-10 parts of high alumina, 4-8 parts of modified silicon carbide, 2-6 parts of dolomite, 2-5 parts of magnesium oxide, 2-5 parts of strontium carbonate, 0.8-1.8 parts of far infrared ceramic powder and 10-25 parts of reinforcing agent. The rock plate has excellent modulus of rupture and extremely high breaking strength, so that the rock plate is not easy to crack; the modulus of rupture and the breaking strength are obviously improved by adding the modified silicon carbide and the reinforcing agent into the formula of the rock plate.

Description

A kind of non-fragile rock slab and preparation method thereof

technical field

The invention relates to the technical field of rock slabs, in particular to a non-fragile rock slab and a preparation method thereof.

Background technique

Ceramic slate, the English description is SINTERED STONE, which means sintered stone. It is made of natural raw materials through a special process, pressed by a press, combined with advanced production technology, and fired at a high temperature above 1100 ° C, which can withstand cutting. , drilling, grinding and other large-scale new porcelain materials.

Ceramic slate is mainly used in the field of home and kitchen board. At present, the existing rock slabs are easily damaged during use, transportation and installation, so it is necessary to improve the fracture modulus and failure strength of the rock slabs, so that the rock slabs are not easily broken.

SUMMARY OF THE INVENTION

The invention provides a non-fragile rock slab and a preparation method thereof. The rock slab has good fracture modulus and extremely high failure strength, so that it is not easily fragmented.

The present invention solves its technical problem and adopts following technical scheme:

A non-fragile rock slab is made from the following raw materials in parts by weight: 40-55 parts of wollastonite, 25-40 parts of mullite, 15-20 parts of potassium feldspar, 10-20 parts of coke gemstone, 6-12 parts of parts of sintered talc, 5-10 parts of high alumina, 4-8 parts of modified silicon carbide, 2-6 parts of dolomite, 2-5 parts of magnesium oxide, 2-5 parts of strontium carbonate, 0.8-1.8 parts of far-infrared ceramic powder , 10 to 25 parts of enhancer.

The applicant of the present invention has found in a large number of slate researches that the slate formula with wollastonite and potassium feldspar as the main raw materials can form a multi-crystalline phase by introducing calcium element, specifically an anorthite crystalline phase, The stress between the crystal phases will be released to a certain extent, and the stress between the crystal lattices will be improved, so that the rock slab is not easy to crack. Due to the addition of wollastonite and potassium feldspar, the fracture modulus and failure strength of the present invention have a certain degree. The basic value (that is, the addition of the two makes the fracture modulus and failure strength of the rock slab have a high starting value).

As a preferred solution, the non-fragile slate is made from the following raw materials in parts by weight: 40-50 parts of wollastonite, 25-35 parts of mullite, 15-18 parts of potassium feldspar, 10-15 parts of coke Gemstone, 6~10 parts sintered talc, 6~10 parts high alumina, 4~7 parts wollastonite, 2~5 parts dolomite, 2~4 parts modified silicon carbide, 2~4 parts strontium carbonate, 0.8~ 1.5 parts of far-infrared ceramic powder, 15 to 25 parts of enhancer.

As a most preferred solution, the non-fragile rock slab is made from the following raw materials in parts by weight: 42 parts of wollastonite, 30 parts of mullite, 16 parts of potassium feldspar, 12 parts of coke gemstone, 8 parts of sintered talc, 7 parts of high alumina, 5 parts of wollastonite, 4 parts of dolomite, 3 parts of modified silicon carbide, 2.5 parts of strontium carbonate, 1 part of far-infrared ceramic powder, 20 parts of reinforcing agent.

As a preferred solution, the reinforcing agent is composed of the following raw materials in parts by weight: 20-30 parts of zirconium dioxide, 15-25 parts of aluminum oxide, 10-20 parts of scandium oxide, 6-12 parts of ammonium fluoride, 5-10 parts of hydroxymethyl cellulose sodium.

The applicant of the present invention has found in a large number of studies that the fracture modulus and failure strength of rock slabs can be significantly improved by adding reinforcing agents, wherein ammonium fluoride can form a skeleton porous structure with rock slab raw materials (such as mullite), which has Uniform and continuous pore walls, which can improve the modulus of rupture and failure strength, and achieve the effect of not being easily broken; scandium oxide has the mechanical properties of high melting point, high strength, good toughness, and good elastic modulus, and zirconium dioxide also has mechanical properties. It can form a porous skeleton structure with the raw material of the slate, so as to improve the modulus of rupture and failure strength, and achieve the effect of not being easily broken.

In addition, aluminum oxide and zirconium dioxide can cause metal agglomeration, and the addition of carbon nanotubes can reduce the metal agglomeration.

As a preferred solution, the reinforcing agent is composed of the following raw materials in parts by weight: 20-28 parts of zirconium dioxide, 15-22 parts of aluminum oxide, 10-15 parts of scandium oxide, 8-12 parts of ammonium fluoride, 5-8 parts of Sodium Hydroxymethylcellulose.

As a most preferred solution, the reinforcing agent is composed of the following raw materials in parts by weight: 24 parts of zirconium dioxide, 18 parts of aluminum oxide, 12 parts of scandium oxide, 10 parts of ammonium fluoride, and 6 parts of sodium hydroxymethyl cellulose.

As a preferred version, the preparation method of the modified silicon carbide is:

S1: adding 2-6 parts of silicon carbide to 10-20 parts of 6-10wt% ammonia solution, stirring at 100-200 rpm for 1-2 h, filtering and drying to obtain pretreated silicon carbide;

S2: Add the pretreated silicon carbide obtained in S1 into 10~20 parts of 50~70% ethanol solution, add 1~4 parts of carbon nanotubes, 0.4~0.8 parts of coupling agent, and stir at 100~200rpm for 1~2h , filtered and dried to obtain the modified silicon carbide.

As a preferred solution, the coupling agent is KH-590.

Silicon carbide has the advantages of high hardness and high strength, and is widely used in the field of ceramic slate. By compounding it with carbon nanotubes, it can achieve complementarity and mutual promotion, and can further significantly improve the performance of slate. Rupture modulus and breaking strength.

The present invention also provides a method for preparing a non-fragile rock slab, comprising the following steps:

S11: Weigh the raw materials according to the weight percentage of the raw materials and add them into the ball mill, and mix them evenly to obtain a mixed slurry, which is subjected to sieving, aging, iron removal, and inkjet drying to obtain non-fragile slate powder;

S12: The non-fragile slate powder is pressed into shape after being distributed by a press, and dried in a drying kiln to obtain a non-fragile slate green body;

S13: The unbreakable slate green body is conveyed through the belt, decorated with ink jet, and fired at high temperature in the roller kiln. After packaging, the non-fragile slate can be obtained.

As a preferred solution, the calcination temperature is 1250° C., and the calcination time is 150 min.

The prolongation of sintering time can alleviate the problem of sintering bubbles to a certain extent, and can improve the fracture modulus and failure strength of the slate to a certain extent.

Beneficial effects of the present invention: (1) The rock slab of the present invention has excellent modulus of rupture and extremely high breaking strength, so that it is not easily broken; (2) the present invention mainly uses wollastonite and potassium feldspar The slate formula of the raw material can form multiple crystal phases by introducing calcium element, specifically the formation of anorthite crystal phase, the stress between the crystal phases will be released to a certain extent, and the stress between the crystal lattices will be improved, so that the Rock slabs are not easy to crack, and the modulus of rupture and failure strength can be significantly improved by adding modified silicon carbide and reinforcing agents to the formula of rock slabs.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Unless otherwise stated, the "parts" in the present invention are all parts by weight.

Example 1

A non-fragile rock slab is made from the following raw materials in parts by weight: 42 parts of wollastonite, 30 parts of mullite, 16 parts of potassium feldspar, 12 parts of coke gemstone, 8 parts of sintered talc, 7 parts of high alumina, 5 parts of wollastonite, 4 parts of dolomite, 3 parts of modified silicon carbide, 2.5 parts of strontium carbonate, 1 part of far-infrared ceramic powder, 20 parts of reinforcing agent.

The reinforcing agent is composed of the following raw materials in parts by weight: 24 parts of zirconium dioxide, 18 parts of aluminum oxide, 12 parts of scandium oxide, 10 parts of ammonium fluoride, and 6 parts of sodium hydroxymethyl cellulose.

The preparation method of the modified silicon carbide is:

S1: adding 4 parts of silicon carbide to 12 parts of 8wt% ammonia solution, stirring at 150rpm for 1.2h, filtering, and drying to obtain pretreated silicon carbide;

S2: Add the pretreated silicon carbide obtained in S1 into 15 parts of 60% ethanol solution, add 2 parts of carbon nanotubes and 0.5 part of coupling agent, stir at 150rpm for 1.5h, filter and dry to obtain the modified Silicon carbide.

The coupling agent is KH-590.

The preparation method of the described non-fragile rock slab comprises the following steps:

S11: Weigh the raw materials according to the weight percentage of the raw materials and add them into the ball mill, and mix them evenly to obtain a mixed slurry, which is subjected to sieving, aging, iron removal, and inkjet drying to obtain non-fragile slate powder;

S12: The non-fragile slate powder is pressed into shape after being distributed by a press, and dried in a drying kiln to obtain a non-fragile slate green body;

S13: The unbreakable slate green body is conveyed through the belt, decorated with ink jet, and fired at a high temperature in a roller kiln. The firing temperature is 1250°C, and the firing time is 150 minutes. The said non-fragile rock slab.

Example 2

A non-fragile rock slab is made from the following raw materials in parts by weight: 40 parts of wollastonite, 25 parts of mullite, 15 parts of potassium feldspar, 10 parts of coke gemstone, 6 parts of sintered talc, 5 parts of high alumina, 4 parts of modified silicon carbide, 2 parts of dolomite, 2 parts of magnesium oxide, 2 parts of strontium carbonate, 0.8 parts of far-infrared ceramic powder, 10 parts of reinforcing agent.

The reinforcing agent is composed of the following raw materials in parts by weight: 24 parts of zirconium dioxide, 18 parts of aluminum oxide, 12 parts of scandium oxide, 10 parts of ammonium fluoride, and 6 parts of sodium hydroxymethyl cellulose.

The preparation method of the modified silicon carbide is:

S1: adding 4 parts of silicon carbide to 12 parts of 8wt% ammonia solution, stirring at 150rpm for 1.2h, filtering, and drying to obtain pretreated silicon carbide;

S2: Add the pretreated silicon carbide obtained in S1 into 15 parts of 60% ethanol solution, add 2 parts of carbon nanotubes and 0.5 part of coupling agent, stir at 150rpm for 1.5h, filter and dry to obtain the modified Silicon carbide.

The coupling agent is KH-590.

The preparation method of the described non-fragile rock slab comprises the following steps:

S11: Weigh the raw materials according to the weight percentage of the raw materials and add them into the ball mill, and mix them evenly to obtain a mixed slurry, which is subjected to sieving, aging, iron removal, and inkjet drying to obtain non-fragile slate powder;

S12: The non-fragile slate powder is pressed into shape after being distributed by a press, and dried in a drying kiln to obtain a non-fragile slate green body;

S13: The unbreakable slate green body is conveyed through the belt, decorated with ink jet, and fired at a high temperature in a roller kiln. The firing temperature is 1250°C, and the firing time is 150 minutes. The said non-fragile rock slab.

Example 3

A non-fragile rock slab is made from the following raw materials in parts by weight: 55 parts of wollastonite, 40 parts of mullite, 20 parts of potassium feldspar, 20 parts of coke gemstone, 12 parts of sintered talc, 10 parts of high alumina, 8 parts of modified silicon carbide, 6 parts of dolomite, 5 parts of magnesium oxide, 5 parts of strontium carbonate, 1.8 parts of far-infrared ceramic powder, 25 parts of reinforcing agent.

The reinforcing agent is composed of the following raw materials in parts by weight: 24 parts of zirconium dioxide, 18 parts of aluminum oxide, 12 parts of scandium oxide, 10 parts of ammonium fluoride, and 6 parts of sodium hydroxymethyl cellulose.

The preparation method of the modified silicon carbide is:

S1: adding 4 parts of silicon carbide to 12 parts of 8wt% ammonia solution, stirring at 150rpm for 1.2h, filtering, and drying to obtain pretreated silicon carbide;

S2: Add the pretreated silicon carbide obtained in S1 into 15 parts of 60% ethanol solution, add 2 parts of carbon nanotubes and 0.5 part of coupling agent, stir at 150rpm for 1.5h, filter and dry to obtain the modified Silicon carbide.

The coupling agent is KH-590.

The preparation method of the described non-fragile rock slab comprises the following steps:

S11: Weigh the raw materials according to the weight percentage of the raw materials and add them into the ball mill, and mix them evenly to obtain a mixed slurry, which is subjected to sieving, aging, iron removal, and inkjet drying to obtain non-fragile slate powder;

S12: The non-fragile slate powder is pressed into shape after being distributed by a press, and dried in a drying kiln to obtain a non-fragile slate green body;

S13: The unbreakable slate green body is conveyed through the belt, decorated with ink jet, and fired at a high temperature in a roller kiln. The firing temperature is 1250°C, and the firing time is 150 minutes. The said non-fragile rock slab.

Example 4

A non-fragile rock slab is made from the following raw materials in parts by weight: 42 parts of wollastonite, 30 parts of mullite, 16 parts of potassium feldspar, 12 parts of coke gemstone, 8 parts of sintered talc, 7 parts of high alumina, 5 parts of wollastonite, 4 parts of dolomite, 3 parts of modified silicon carbide, 2.5 parts of strontium carbonate, 1 part of far-infrared ceramic powder, 20 parts of reinforcing agent.

The reinforcing agent is composed of the following raw materials in parts by weight: 20 parts of zirconium dioxide, 15 parts of aluminum oxide, 10 parts of scandium oxide, 6 parts of ammonium fluoride, and 5 parts of sodium hydroxymethyl cellulose.

The preparation method of the modified silicon carbide is:

S1: adding 4 parts of silicon carbide to 12 parts of 8wt% ammonia solution, stirring at 150rpm for 1.2h, filtering, and drying to obtain pretreated silicon carbide;

S2: Add the pretreated silicon carbide obtained in S1 into 15 parts of 60% ethanol solution, add 2 parts of carbon nanotubes and 0.5 part of coupling agent, stir at 150rpm for 1.5h, filter and dry to obtain the modified Silicon carbide.

The coupling agent is KH-590.

The preparation method of the described non-fragile rock slab comprises the following steps:

S11: Weigh the raw materials according to the weight percentage of the raw materials and add them into the ball mill, and mix them evenly to obtain a mixed slurry, which is subjected to sieving, aging, iron removal, and inkjet drying to obtain non-fragile slate powder;

S12: The non-fragile slate powder is pressed into shape after being distributed by a press, and dried in a drying kiln to obtain a non-fragile slate green body;

S13: The unbreakable slate green body is conveyed through the belt, decorated with ink jet, and fired at a high temperature in a roller kiln. The firing temperature is 1250°C, and the firing time is 150 minutes. The said non-fragile rock slab.

Example 5

A non-fragile rock slab is made from the following raw materials in parts by weight: 42 parts of wollastonite, 30 parts of mullite, 16 parts of potassium feldspar, 12 parts of coke gemstone, 8 parts of sintered talc, 7 parts of high alumina, 5 parts of wollastonite, 4 parts of dolomite, 3 parts of modified silicon carbide, 2.5 parts of strontium carbonate, 1 part of far-infrared ceramic powder, 20 parts of reinforcing agent.

The reinforcing agent is composed of the following raw materials in parts by weight: 30 parts of zirconium dioxide, 25 parts of aluminum oxide, 20 parts of scandium oxide, 12 parts of ammonium fluoride, and 10 parts of sodium hydroxymethyl cellulose.

The preparation method of the modified silicon carbide is:

S1: adding 4 parts of silicon carbide to 12 parts of 8wt% ammonia solution, stirring at 150rpm for 1.2h, filtering, and drying to obtain pretreated silicon carbide;

S2: Add the pretreated silicon carbide obtained in S1 into 15 parts of 60% ethanol solution, add 2 parts of carbon nanotubes and 0.5 part of coupling agent, stir at 150rpm for 1.5h, filter and dry to obtain the modified Silicon carbide.

The coupling agent is KH-590.

The preparation method of the described non-fragile rock slab comprises the following steps:

S11: Weigh the raw materials according to the weight percentage of the raw materials and add them into the ball mill, and mix them evenly to obtain a mixed slurry, which is subjected to sieving, aging, iron removal, and inkjet drying to obtain non-fragile slate powder;

S12: The non-fragile slate powder is pressed into shape after being distributed by a press, and dried in a drying kiln to obtain a non-fragile slate green body;

S13: The unbreakable slate green body is conveyed through the belt, decorated with ink jet, and fired at a high temperature in a roller kiln. The firing temperature is 1250°C, and the firing time is 150 minutes. The said non-fragile rock slab.

Comparative Example 1

The difference between Comparative Example 1 and Example 1 is that Comparative Example 1 does not contain modified silicon carbide, and the others are the same.

Comparative Example 2

The difference between Comparative Example 2 and Example 1 is that the modified silicon carbide is replaced by silicon carbide in Comparative Example 2, and the others are the same.

Comparative Example 3

The difference between Comparative Example 3 and Example 1 is that in the preparation method of modified silicon carbide described in Comparative Example 3, carbon fibers are used to replace carbon nanotubes, and the others are the same.

Comparative Example 4

The difference between Comparative Example 4 and Example 1 is that Comparative Example 4 does not contain a reinforcing agent, and the others are the same.

Comparative Example 5

The difference between Comparative Example 5 and Example 1 is that the reinforcing agent of Comparative Example 5 does not contain ammonium fluoride, and the others are the same.

Comparative Example 6

The difference between Comparative Example 6 and Example 1 is that the reinforcing agent of Comparative Example 5 does not contain zirconium dioxide, and the others are the same.

Comparative Example 7

The difference between Comparative Example 7 and Example 1 is that the reinforcing agent of Comparative Example 5 does not contain scandium oxide, and the others are the same.

Comparative Example 8

The difference between Comparative Example 8 and Example 1 is that the reinforcing agent of Comparative Example 5 does not contain alumina, and the others are the same.

In order to further prove the effect of the present invention, the following test methods are provided:

1. Use the SKZ-10000A-600 digital display ceramic tile rupture modulus and failure strength tester to test the rupture modulus and failure strength. See Table 1 for the test.

Table 1 Test results

As can be seen from Table 1, the rock slab of the present invention has excellent modulus of rupture and extremely high failure strength, so that it is not easy to be broken; Affects modulus of rupture and failure strength, wherein Example 1 is the best ratio; comparing Examples 1, 4, and 5, it can be known that the ratio of different reinforcing agents can affect the modulus of rupture and failure strength, and Example 1 is the best. It can be seen from the comparison of Example 1 and Comparative Examples 1-3 that the modified silicon carbide of the present invention can significantly improve the modulus of rupture and failure strength; it can be seen from the comparison of Example 1 and Comparative Examples 4-8 that this The reinforcing agent of the invention can significantly improve the modulus of rupture and the breaking strength.

Taking the above ideal embodiments according to the present invention as inspiration, and through the above descriptions, relevant personnel can make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the contents of the specification, and the technical scope must be determined according to the scope of the claims.

Claims (6)

1. The rock plate not easy to crack is characterized by being prepared from the following raw materials in parts by weight: 40-55 parts of wollastonite, 25-40 parts of mullite, 15-20 parts of potassium feldspar, 10-20 parts of flint clay, 6-12 parts of calcined talc, 5-10 parts of high alumina, 4-8 parts of modified silicon carbide, 2-6 parts of dolomite, 2-5 parts of magnesium oxide, 2-5 parts of strontium carbonate, 0.8-1.8 parts of far infrared ceramic powder and 10-25 parts of reinforcing agent;

the preparation method of the modified silicon carbide comprises the following steps:

s1: adding 2-6 parts of silicon carbide into 10-20 parts of 6-10 wt% ammonia water solution, stirring at the rotating speed of 100-200 rpm for 1-2 hours, filtering, and drying to obtain pretreated silicon carbide;

s2: adding the pretreated silicon carbide obtained in the step S1 into 10-20 parts of 50-70% ethanol solution, adding 1-4 parts of carbon nano tube and 0.4-0.8 part of coupling agent, stirring at the rotating speed of 100-200 rpm for 1-2 hours, filtering, and drying to obtain the modified silicon carbide;

the reinforcing agent is composed of the following raw materials in parts by weight: 20-30 parts of zirconium dioxide, 15-25 parts of aluminum oxide, 10-20 parts of scandium oxide, 6-12 parts of ammonium fluoride and 5-10 parts of sodium hydroxymethyl cellulose.

2. The non-breakable rock plate according to claim 1, wherein the reinforcing agent is composed of the following raw materials in parts by weight: 20-28 parts of zirconium dioxide, 15-22 parts of aluminum oxide, 10-15 parts of scandium oxide, 8-12 parts of ammonium fluoride and 5-8 parts of sodium hydroxymethyl cellulose.

3. The non-breakable rock plate according to claim 1, wherein the reinforcing agent is composed of the following raw materials in parts by weight: 24 parts of zirconium dioxide, 18 parts of aluminum oxide, 12 parts of scandium oxide, 10 parts of ammonium fluoride and 6 parts of sodium hydroxymethyl cellulose.

4. The non-friable rock panel of claim 1, wherein the coupling agent is KH-590.

5. The method for preparing a non-breakable rock plate according to any one of claims 1 to 4, comprising the steps of:

s11: weighing the raw materials according to the weight percentage, adding the raw materials into a ball mill, uniformly mixing to obtain mixed slurry, and obtaining the non-breakable rock slab powder through sieving, ageing, iron removal and ink-jet drying;

s12: distributing the non-brittle fractured rock slab powder by a press, then performing compression molding, and drying by a drying kiln to obtain a non-brittle fractured rock slab green body;

s13: conveying the rock plate green body which is not easy to crack by a belt, carrying out ink-jet decoration, firing the rock plate green body in a roller kiln at a high temperature of 1200-1300 ℃ for 100-150 min, cooling, edging and packaging to obtain the rock plate which is not easy to crack.

6. The method for preparing a non-breakable rock plate according to claim 5, wherein the firing temperature is 1250 ℃ and the firing time is 150 min.