CN117049865A - Rock plate capable of emitting far infrared rays and inducing negative oxygen ions and preparation method thereof - Google Patents

Abstract

The application provides a rock plate capable of emitting far infrared rays and inducing negative oxygen ions and a preparation method thereof, wherein the rock plate is prepared from the following components: potassium sodium feldspar, magnetite, kaolin, cordierite, diatomite, nanometer yttrium oxide, lanthanum oxide, modified graphene oxide and modified activated carbon powder are added, the overall far infrared emissivity of the rock plate can be improved by adding nanometer yttrium oxide and modified graphene oxide, the dispersibility of each component and the fusion capability at high temperature can be remarkably improved by adding modified activated carbon powder, the mechanical strength is high, the bed resistance is small, the chemical stability is good, the composite material is easy to regenerate and durable, the composite material can be added into the rock plate to serve as a component, the effect of improving the mechanical strength to a certain extent is achieved, the bending strength and toughness of the rock plate are remarkably improved, the hydroxyl apatite crystals are enriched, the dispersion of each component and the emissivity of far infrared rays are facilitated, the dipole moment between the powder is improved, the dipole moment in the powder is subjected to strong change, and energy is released when the composite material is downwards transited.

Description

A kind of rock board that emits far-infrared rays and induces negative oxygen ions and its preparation method

Technical field

The present invention relates to the technical field of building materials, and in particular to a rock slab that emits far-infrared rays and induces negative oxygen ions and a preparation method thereof.

Background technique

In recent years, ceramic rock slabs have become popular in the market due to their high strength, good hardness and strong decorative effect. Ceramic slate can not only be used for conventional wall and floor decoration, but can also be used as countertops, cabinet doors, drawer doors, screens, etc. It has excellent acid and alkali resistance and high hardness (the surface Mohs hardness can reach level 6 Above), high temperature resistance and other advantages, therefore, it has extremely broad application prospects and has been widely used in the construction industry. However, its mechanical strength is low and it is prone to problems such as breakage during processing, transportation and use.

But infrared is an invisible electromagnetic wave with a wavelength between microwaves and visible light. Infrared rays can be divided into near infrared (wavelength 1-3 μm), mid-infrared (wavelength 3-5 μm) and far infrared (wavelength 8-14 μm). Far-infrared rays themselves have functions such as disinfection, sterilization, and activation, and are mainly used in far-infrared health care products. Infrared radiation slates can not only disinfect and antibacterial, but also have application functions such as promoting metabolism, activating organisms, and improving immunity. To prepare building products with infrared radiation functions, you first need to select infrared radiation powder with high performance. Infrared radiation powder directly absorbs the heat emitted by the surrounding environment and converts it into far-infrared energy. The principle is the change of the molecular dipole moment of the material. The result of the interaction between the two and the oscillating electric field of light. During the oscillation process, the multi-ion system changes the symmetry properties of the molecule itself, causing the dipole moment to change, which can greatly improve the infrared absorption and emission capabilities.

Therefore, there is an urgent need for a rock plate that has the function of emitting far-infrared rays and generating negative oxygen ions while maintaining high strength and a preparation method thereof.

Contents of the invention

The purpose of this invention is to solve the problem that existing rock slabs cannot emit far-infrared rays and negative oxygen ions, and a small amount of tourmaline is added to rock slabs that can emit far-infrared rays and produce negative oxygen ions. However, their far-infrared emissivity is small and their intensity is low and cannot emit far-infrared rays. To meet the technical issues of use requirements, provide a rock plate that not only emits far-infrared rays and generates negative oxygen ions, but also maintains high strength.

The second object of the present invention is to provide a method for preparing rock slabs that emit far-infrared rays and induce negative oxygen ions.

In order to achieve the above-mentioned first purpose, the technical solution adopted by the present invention is:

A rock slab that emits far-infrared rays and induces negative oxygen ions is made of the following components in parts by weight: 63 to 71 parts of potassium albite, 5 to 8 parts of magnetite, and 12 to 27 parts of kaolin. , 10 to 13 parts of cordierite, 12 to 18 parts of diatomaceous earth, 2 to 5 parts of nanometer yttrium oxide, 2 to 5 parts of lanthanum oxide, 10 to 15 parts of modified graphene oxide, 24 to 32 parts of modified activated carbon powder, By adding nano-yttrium oxide and modified graphene oxide, the overall far-infrared emissivity of the rock slab can be improved, while by adding modified activated carbon powder, the dispersion performance of each component, the fusion ability at high temperatures, and the mechanical strength can be significantly improved. High, low bed resistance, good chemical stability, easy to regenerate, and durable. When added to the rock slab as a component, it can have a certain effect on improving the mechanical strength and significantly improve the flexural strength and toughness of the rock slab. And it is rich in hydroxyapatite crystals, which helps the dispersion of various components and improves the emissivity of far-infrared rays, increases the dipole moment between powders, and causes a strong change in the dipole moment in the powder, downwards When you jump, energy is released.

Preferably, the modified activated carbon powder is a blend powder of coconut shell granular carbon and inorganic metal oxide, and its preparation method includes the following steps:

Coconut shell granular carbon with a particle size of 1.8 to 2.2 mm, a column length of 2 to 6 mm, an iodine adsorption value ≥ 1200 mg/g, a CTC ≥ 85%, an ash content ≥ 9%, a wear resistance ≥ 95%, and a moisture content ≥ 5% and inorganic metal oxide powder, conduct ball milling at 80°C at a speed of 300-800rpm, and the ball milling time is 5-10h to obtain modified activated carbon powder with a particle size of ≥150 mesh. By selecting coconut shell granular carbon and magnesium, titanium, and manganese The blending and modification of three kinds of oxidized metal powders makes the prepared rock slabs beneficial to exert their load-bearing capacity when loaded, giving the rock slabs high fracture strength.

Preferably, the inorganic metal oxide is a mixture of MnO ₂ , TiO ₂ and MgO. By doping magnesium, titanium and manganese oxide metal powders, it can be given pyroelectric properties to form multiple triple octahedrons. Or multiple polar structures such as triangular octahedron, which can improve the ability to emit far-infrared rays, causing defects and distortions in the complete crystal forms of magnesium, titanium, and manganese, increasing the energy of the system, increasing disorder, and increasing infrared emissivity.

Preferably, the ratio of MnO ₂ , TiO ₂ and MgO is 1:1:2, which can better exert the charge compensation between magnesium, manganese and titanium. After blending with coconut shell granular carbon, it can form multiple A ring structure improves its pyroelectric performance.

Preferably, the mixing ratio of the coconut shell particle carbon and the inorganic metal oxide is 5:2.

Preferably, the preparation method of modified graphene oxide includes the following steps:

Heat the mixed solution containing ammonium chloride and rare earth chloride in a water bath at 40-50°C, add graphene oxide, ultrasonic for 30-90 minutes at a power of 200-325W, wash and vacuum dry to obtain modified graphene oxide. , by modifying graphene oxide, it can provide a large number of active sites for connecting to other molecular structures and functional groups, thereby improving the compatibility between various powders, avoiding stacking and agglomeration, and improving its performance in the system. uniform dispersion.

Preferably, the rare earth chloride is a mixture of cerium chloride, yttrium chloride and gallium chloride. By selecting the rare earth element, it can form coordination bonds with the oxygen-containing functional groups of graphene oxide, generate new functional groups, and reduce the cost of graphene oxide. The interface energy and surface energy of graphene are functionalized to modify graphene oxide, which increases the degree of lattice distortion, reduces the pinning effect of oxygen vacancies, improves pyroelectric performance, and enhances the dispersion of graphene oxide in the system. properties, improving its far-infrared emissivity.

Preferably, the ratio of ammonium chloride, cerium chloride, yttrium chloride and gallium chloride is 3:3:1:1.

Preferably, the solid content of the graphene oxide added to the mixed solution is 20-30%.

In order to achieve the above second purpose, the technical solution adopted by the present invention is:

A method for preparing a rock slab that emits far-infrared rays and induces negative oxygen ions as described in any one of the above, including the following steps:

S1: Weigh albite, magnetite, kaolin, cordierite, diatomaceous earth, nanometer yttrium oxide and lanthanum oxide according to the weight of raw materials and add them to the ball mill. After mixing for 3-4 hours, add modified graphene oxide and Modified activated carbon powder is mixed for 6-10 hours to obtain a mixed slurry, which is screened, aged, and spray-dried to obtain rock slab powder;

S2: The rock slab powder in step S1 is spread through a press and pressed into shape, and dried in a drying kiln to obtain a green slab;

S3: Treat the surface of the green rock slab in step S2, apply base glaze, inkjet decoration, and fire it into shape at high temperature. The firing temperature is 800-1000°C, the firing time is 120-180 minutes, and it is cooled and edged. , polishing, waxing, and packaging to obtain the rock slab that emits far-infrared rays and induces negative oxygen ions.

Compared with the prior art, the present invention has the following advantages:

1. This application provides a rock slab that emits far-infrared rays and induces negative oxygen ions. By adding nano-yttrium oxide and modified graphene oxide, the overall far-infrared emissivity of the rock slab can be improved, and by adding modified activated carbon Powder can significantly improve the dispersion performance of each component and the fusion ability at high temperatures. It has high mechanical strength, small bed resistance, good chemical stability, easy regeneration, and durability. When added to rock slabs as a component, it can It has the effect of improving the mechanical strength to a certain extent, significantly improving the flexural strength and toughness of the rock plate, and it is rich in hydroxyapatite crystals, which helps to disperse the various components and improve the emissivity of far-infrared rays, improving the powder The dipole moment between them causes a strong change in the dipole moment in the powder. When it transitions downward, energy will be released.

2. This application provides a method for preparing rock slabs that emit far-infrared rays and induce negative oxygen ions. The steps are simple and convenient, suitable for industrial production, and meet the needs of green and environmental protection. The raw materials are premixed first and then modified. Graphene and modified activated carbon powder improve the fluidity between each component material and improve the compatibility between each powder, avoid stacking and agglomeration, and improve their uniform dispersion in the system.

Detailed ways

The specific technical solutions of the present invention will be described below in conjunction with specific embodiments 1-3 and comparative examples 1-5:

(1) Preparation of modified activated carbon powder

Coconut shell granular carbon with a particle size of 1.8 to 2.2 mm, a column length of 2 to 6 mm, an iodine adsorption value ≥ 1200 mg/g, a CTC ≥ 85%, an ash content ≥ 9%, a wear resistance ≥ 95%, and a moisture content ≥ 5% Mix it with inorganic metal oxide powder at a mixing ratio of 5:2, conduct ball milling at 700 rpm at 80°C, and the ball milling time is 8 hours to obtain modified activated carbon powder with a particle size of ≥150 mesh for later use. The inorganic metal oxide The ratio of powdered MnO ₂ , TiO ₂ and MgO is 1:1:2.

(2) Preparation of modified graphene oxide

Heat the mixed solution containing ammonium chloride, cerium chloride, yttrium chloride and gallium chloride in a water bath at 40-50°C, add graphene oxide at 26.3% of the mixed solution, ultrasonic for 60 minutes at a power of 325W, wash and After vacuum drying, modified graphene oxide is obtained and is ready for use. The ratio of ammonium chloride, cerium chloride, yttrium chloride and gallium chloride is 3:3:1:1.

Example 1:

Weigh potassium albite, magnetite, kaolin, cordierite, diatomite, nanometer yttrium oxide and lanthanum oxide in parts by weight according to Table 1 and add them to the ball mill. After mixing for 3 hours, add modified graphene oxide and modified activated carbon. Powder, mix for 6 hours to obtain a mixed slurry, which is screened, aged, and spray-dried to obtain rock slab powder; the rock slab powder is spread through a press and pressed into shape, and dried in a drying kiln to obtain a green rock slab;

The surface of the raw rock slab is treated, applied with base glaze, decorated with inkjet, and fired at high temperature for molding. The firing temperature is 1000°C and the firing time is 120 minutes. After cooling, edge grinding, polishing, waxing, and packaging, the product is obtained. .

Example 2:

Weigh potassium albite, magnetite, kaolin, cordierite, diatomite, nanometer yttrium oxide and lanthanum oxide in parts by weight according to Table 1 and add them to the ball mill. After mixing for 3 hours, add modified graphene oxide and modified activated carbon. Powder, mix for 8 hours to obtain a mixed slurry, which is screened, aged, and spray-dried to obtain rock slab powder; the rock slab powder is spread through a press and pressed into shape, and dried in a drying kiln to obtain a green rock slab;

The surface of the raw rock slab is treated, the base glaze is applied, inkjet decoration is applied, and the high-temperature firing is performed. The firing temperature is 900°C and the firing time is 160 minutes. After cooling, edging, polishing, waxing, and packaging, the product is obtained .

Example 3:

Weigh albite, magnetite, kaolin, cordierite, diatomite, nanometer yttrium oxide and lanthanum oxide according to the weight parts in Table 1 and add them to the ball mill. After mixing for 4 hours, add modified graphene oxide and modified activated carbon. powder, mix for 10 hours to obtain a mixed slurry, which is screened, aged, and spray-dried to obtain rock slab powder; the rock slab powder is spread through a press and pressed into shape, and dried in a drying kiln to obtain a green rock slab;

The surface of the raw rock slab is treated, applied with base glaze, decorated with inkjet, and fired at high temperature for molding. The firing temperature is 800°C and the firing time is 180 minutes. After cooling, grinding, polishing, waxing, and packaging, the product is obtained. .

Comparative example 1

The difference between Comparative Example 1 and Example 1 is that Comparative Example 1 does not contain modified activated carbon powder, and the other compositions, contents, and preparation methods are the same as Example 1.

Comparative example 2

The difference between Comparative Example 2 and Example 1 is that Comparative Example 1 does not contain modified graphene, and the other compositions, contents, and preparation methods are the same as Example 1.

Comparative example 3

The difference between Comparative Example 3 and Example 1 is that Comparative Example 1 does not contain cordierite and nanometer yttrium oxide, and the other compositions, contents, and preparation methods are the same as Example 1.

Comparative example 4

The difference between Comparative Example 4 and Example 1 is that Comparative Example 1 does not contain diatomite, and the remaining compositions, contents, and preparation methods are the same as Example 1.

Comparative example 5

The difference between Comparative Example 5 and Example 1 is that the preparation method does not premix the raw materials first, but directly adds modified activated carbon powder and modified graphene. The remaining composition contents are the same as Example 1.

Table 1: Weight parts of each component in Examples 1-3 and Comparative Examples 1-5

The rock slabs prepared in Examples 1-3 and Comparative Examples 1-5 were respectively subjected to relevant performance tests. The far-infrared emissivity was tested using a Fourier transform infrared spectrometer (FTIR, Bruker-80V, Germany). The wave number range provided by the instrument The range is 10000cm ^-1 -200cm ^-1 , the accuracy is 0.01cm ^-1 , the resolution is ≤4cm ^-1 , and the far-infrared emissivity test range is 8-14μm. The test results are shown in Table 2 below.

Table 2: Test of rock slabs prepared in Examples 1-3 and Comparative Examples 1-5

It can be seen from the performance test of the rock panels prepared in each embodiment and comparative example in Table 1 that the far-infrared emissivity of the rock panels prepared in Examples 1-3 is higher. Compared with Example 1, Comparative Examples 1-4 have No raw material components such as modified graphene oxide, modified activated carbon powder, nanometer yttrium oxide, cordierite and diatomite are added. From the test results, it can be seen that its flexural strength, damage strength and far-infrared emissivity are all the same. It is not as good as Example 1, that is, the flexural strength, damage strength and excellent far-infrared emission function of the present invention are the result of the comprehensive action of modified graphene oxide, modified activated carbon powder, nanometer yttrium oxide, cordierite and diatomite. Compared with Example 1, Comparative Example 5 does not adopt the preparation method of the present application, so the damage intensity and far-infrared emissivity are also lower.

Therefore, the present application provides a rock slab that emits far-infrared rays and induces negative oxygen ions. By adding nano-yttrium oxide and modified graphene oxide, the overall far-infrared emissivity of the rock slab can be improved, and by adding modified activated carbon Powder can significantly improve the dispersion properties of each component and the fusion ability at high temperatures. Adding it to the rock slab as a component can have a certain effect on improving the mechanical strength and significantly improve the flexural strength and toughness of the rock slab. , and it is rich in hydroxyapatite crystals, which helps the dispersion of each component and improves the emissivity of far-infrared rays, increases the dipole moment between powders, and causes a strong change in the dipole moment in the powder, towards When it transitions down, energy will be released. The preparation method provided in this application has simple and convenient steps, is suitable for industrial production, and meets the needs of green and environmental protection. The raw materials are premixed first, and then modified graphene and modified activated carbon powder are added. , improves the fluidity between each component material, improves the compatibility between various powders, avoids stacking and agglomeration, and improves their uniform dispersion in the system.

The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application shall be included in the protection of the present application. within the range.

Claims (10)

1. A rock slab that emits far-infrared rays and induces negative oxygen ions, characterized in that it is made of the following components in parts by weight: 63 to 71 parts of potassium albite, 5 to 8 parts of magnetite , 12 to 27 parts of kaolin, 10 to 13 parts of cordierite, 12 to 18 parts of diatomite, 2 to 5 parts of nanometer yttrium oxide, 2 to 5 parts of lanthanum oxide, 10 to 15 parts of modified graphene oxide, 24 to 32 modified activated carbon powder. 2. The rock slab that emits far-infrared rays and induces negative oxygen ions according to claim 1, characterized in that: the modified activated carbon powder is a blend powder of coconut shell granular carbon and inorganic metal oxides, and its preparation method is: Includes the following steps: Coconut shell granular carbon with a particle size of 1.8 to 2.2 mm, a column length of 2 to 6 mm, an iodine adsorption value ≥ 1200 mg/g, a CTC ≥ 85%, an ash content ≥ 9%, a wear resistance ≥ 95%, and a moisture content ≥ 5% With inorganic metal oxide powder, perform ball milling at 300-800 rpm and 80°C for 5-10 hours to obtain modified activated carbon powder with a particle size of ≥150 mesh. 3. The rock slab emitting far-infrared rays and inducing negative oxygen ions according to claim 2, characterized in that the inorganic metal oxide is a mixture of MnO ₂ , TiO ₂ and MgO. 4. The rock slab that emits far-infrared rays and induces negative oxygen ions according to claim 3, characterized in that: the ratio of MnO ₂ , TiO ₂ and MgO is 1:1:2. 5. The rock slab that emits far-infrared rays and induces negative oxygen ions according to claim 2, characterized in that: the mixing ratio of the coconut shell particle carbon and the inorganic metal oxide is 5:2. 6. The rock slab that emits far-infrared rays and induces negative oxygen ions according to claim 1, characterized in that: the preparation method of modified graphene oxide includes the following steps: Heat the mixed solution containing ammonium chloride and rare earth chloride in a water bath at 40-50°C, add graphene oxide, ultrasonic for 30-90 minutes at a power of 200-325W, wash and vacuum dry to obtain modified graphene oxide. . 7. The rock slab emitting far-infrared rays and inducing negative oxygen ions according to claim 6, characterized in that the rare earth chloride is a mixture of cerium chloride, yttrium chloride and gallium chloride. 8. The rock slab emitting far-infrared rays and inducing negative oxygen ions according to claim 7, characterized in that: the ratio of ammonium chloride, cerium chloride, yttrium chloride and gallium chloride is 3:3: 1:1. 9. The rock slab that emits far-infrared rays and induces negative oxygen ions according to claim 6, characterized in that the solid content of the graphene oxide added to the mixed solution is 20-30%. 10. A method for preparing a rock slab that emits far-infrared rays and induces negative oxygen ions according to any one of claims 1 to 9, characterized in that it includes the following steps: S1: Weigh albite, magnetite, kaolin, cordierite, diatomaceous earth, nanometer yttrium oxide and lanthanum oxide according to the weight of raw materials and add them to the ball mill. After mixing for 3-4 hours, add modified graphene oxide and Modified activated carbon powder is mixed for 6-10 hours to obtain a mixed slurry, which is screened, aged, and spray-dried to obtain rock slab powder; S2: The rock slab powder in step S1 is spread through a press and pressed into shape, and dried in a drying kiln to obtain a green slab; S3: Treat the surface of the green rock slab in step S2, apply base glaze, inkjet decoration, and fire it into shape at high temperature. The firing temperature is 800-1000°C, the firing time is 120-180 minutes, and it is cooled and edged. , polishing, waxing, and packaging to obtain the rock slab that emits far-infrared rays and induces negative oxygen ions.