CN105198499A - Violet sand earthenware glazing method - Google Patents

Abstract

A method for glazing purple sand pottery of the present invention comprises the following steps: a) drying the body of purple sand pottery in the shade for 3 to 8 days; b) putting it into a kiln for plain firing, and increasing the temperature by 0.5 to 1 °C per minute before the temperature reaches 100 °C; After the temperature reaches 100°C, the temperature increases by 1-2°C per minute until the temperature reaches 500°C; after the temperature reaches 500°C, the temperature increases by 0.8-1.2°C per minute until the temperature reaches the specified value between 600-800°C After reaching the temperature, continue to fire for 3 to 4 hours before leaving the kiln; c) apply the intermediate glaze on the surface of the purple sand pottery by dipping the glaze method, and dry it in the shade before firing in the kiln, firing at 1150 ° C ~ 1250 ° C 5-8 hours, keep warm for 0-10 minutes, then cool down to 270-300°C and leave the kiln; d) Apply medium-temperature glaze on the surface of the cooled intermediate layer by spraying and then enter the kiln, and fire at 1100-1120°C After 2 to 3 hours, let it cool down in the cave.

Description

A kind of purple sand pottery glaze application method

technical field

The invention belongs to the technical field of purple sand pottery decoration, in particular to a method for applying glaze to purple sand pottery.

Background technique

Zisha pottery is a relatively hard pottery product made of purple clay, red clay or green clay. It has a long history and culture in my country. The most famous Zisha pottery is the Zisha teapot, and its biggest feature is that tea can be made with the Zisha pot without losing the original taste of the tea. Because the purple sand pottery pot has large pores, high water absorption rate, and good air permeability, it can maintain the color and fragrance of tea for a long time, thereby delaying the time for tea to go rancid. When brewing tea with boiling water, it is not easy to be cold in winter and not hot in summer. However, due to the large pores of the purple sand pottery pot and no glaze, the tea stains and other substances remaining in the pores are difficult to clean, causing hygiene and health problems.

In addition, since Zisha pottery products have not been glazed for a long time, the decoration of Zisha pottery can only be done through pottery carving, kneading, painting, inlaying, decals, sand mixing, clay painting, printing plates and other methods. Therefore, the decoration of Zisha pottery still only maintains the traditional way, and does not use Jingdezhen ceramics to decorate with glaze to improve its appreciation value.

Contents of the invention

The object of the present invention is to provide a method for glazing on the surface of purple sand pottery, to promote the integration of purple sand pottery and glazing technology, to broaden the scope of decoration technology of purple sand pottery, and to improve the artistic value and appreciation value of purple sand pottery.

In order to realize the purpose of the present invention, the present invention has adopted following technical scheme:

A method for applying glaze to purple sand pottery comprises the following steps:

a) drying the purple sand pottery body in the shade for 3 to 8 days;

b) into the kiln for plain firing, before the temperature reaches 100°C, the temperature increases by 0.5-1°C per minute; after the temperature reaches 100°C, the temperature increases by 1-2°C per minute until the temperature reaches 500°C; After 500°C, the temperature increases by 0.8-1.2°C per minute until the temperature reaches the specified temperature between 600-800°C, and then continues firing for 3-4 hours before leaving the kiln;

c) Apply an intermediate layer of glaze on the surface of the purple sand pottery green body by dipping the glaze method, dry it in the shade, and then put it into a kiln for firing. Fire it at 1150-1250°C for 5-8 hours, keep it warm for 0-10 minutes, and then cool down to Leave the kiln after 270～300℃;

d) Apply medium-temperature glaze on the surface of the cooled intermediate layer glaze by spraying, then put it into the kiln, burn it at 1100-1120°C for 2-3 hours, and then cool the kiln.

Wherein, the mass ratio of the components of the intermediate layer glaze is: frit 2%-5%, salt 1%-3%, quartz 25%-28%, potassium feldspar 18%-20%, mullite 7%~10%, polyammonium methacrylate 2%~3%, potassium oxide 1%~3%, sodium oxide 2%~4%, aluminum oxide 1%~2%, lithium oxide 1%~2%, oxide 1% to 2% of platinum, 0.8% to 1.5% of boron oxide, 2% to 4% of calcium oxide, 2% to 3% of magnesium oxide, and 2% to 3% of zinc oxide.

On this basis, in terms of composition and ratio of the intermediate layer glaze, the expansion coefficient of the intermediate layer glaze must be equal to or slightly smaller than that of the purple sand pottery body, and at the same time, the elastic modulus and tensile strength of the intermediate layer glaze must be adapted to the purple sand pottery body. Pottery body, the coefficient of expansion of each corresponding oxide of interlayer glaze of the present invention is as follows (wherein, the main chemical substance of quartz is silicon dioxide):

The modulus of elasticity of the corresponding components of the interlayer glaze of the present invention is as follows:

Calcium oxide 416×10 ² MPa

Magnesium oxide 250×10 ² MPa

Zinc oxide 346×10 ² MPa

The tensile strength factors of the corresponding components of the interlayer glaze of the present invention are as follows:

Calcium oxide 2.0MPa

Magnesium oxide 0.1MPa

Zinc oxide 1.5MPa

The effect of each oxide in the present invention is as follows respectively:

Silica, reducing the expansion coefficient, fast firing, easy to be eroded by glaze to form a good intermediate layer, etc.;

Sodium oxide, to promote glaze melting and improve its process performance and physical and chemical properties;

Potassium oxide, to promote glaze melting and improve its process performance and physical and chemical properties;

Lithium oxide, reducing the expansion coefficient, replacing sodium oxide and potassium oxide, etc.;

Calcium oxide, easy to be eroded by glaze to form a good intermediate layer, mineralizer, high tensile strength, etc.;

Alumina, easy to be eroded by glaze to form a good intermediate layer, making the glaze shiny, etc.;

Platinum oxide, promote the development of the middle layer glaze, etc.;

Boron oxide reduces the coefficient of expansion and promotes the development of the intermediate glaze, etc.;

Magnesium oxide, reducing expansion coefficient, increasing elasticity, mineralizer effect, etc.;

Zinc oxide increases the elasticity of the intermediate layer glaze, has high elastic tensile strength, and promotes the bonding of the blank glaze;

In addition, the salt component in the interlayer glaze is used to improve the fluidity of the interlayer glaze, and polyammonium methacrylate increases the adhesion of the interlayer glaze.

Further, the fineness of the intermediate layer glaze is 2.2% to 2.4%. On the basis of this thickness, the glaze slurry has better suspending property and stronger adhesion, and is not easy to affect the glazing and shrinkage of the glaze layer. , resulting in cracking and deglazing of the glaze layer of the green body.

Further, the shade drying temperature is 19-21°C.

Further, the thickness of the glaze layer of the intermediate layer glaze is 0.08-0.23mm, under the condition of the thickness of the glaze layer, it is difficult to form cracks and dry glaze phenomenon.

Further, the purple clay content in the purple sand pottery green body is 56%-72%, the proportion of purple clay is higher, the firing temperature is also higher, and the combination with the middle glaze is better.

The beneficial effects of the present invention are:

A kind of barbecue roasting material of the present invention realizes the glazing of purple sand pottery, and solves the occurrence of deglazing, cracking, dry glaze, glaze shrinkage, deformation and other phenomena between the glaze and purple sand pottery, and expands the production scheme of purple sand pottery , enrich the connotation of Zisha pottery culture, and enhance the artistry and appreciation of Zisha pottery.

Detailed ways

The present invention will be further described below in conjunction with embodiment.

Example 1:

A method for glazing purple sand pottery, comprising the following steps:

a) Dry the purple sand pottery body in the shade for 8 days at a temperature of 20°C.

b) into the kiln for plain firing, before the temperature reaches 100°C, the temperature increases by 1°C per minute; after the temperature reaches 100°C, the temperature increases by 2°C per minute until the temperature reaches 500°C; after the temperature reaches 500°C, The temperature rises by 1°C per minute until the temperature reaches 720°C, and then continues firing for 3 hours and 30 minutes before leaving the kiln;

c) Apply an intermediate layer of glaze on the surface of the purple sand pottery biscuit by dipping the glaze method, dry it in the shade, and then put it into the kiln for firing, burn it at 1180°C for 8 hours, keep it warm for 10 minutes, cool it down to 300°C and leave the kiln;

d) Apply medium-temperature glaze to the surface of the cooled intermediate layer glaze by spraying and then put it into the kiln, burn it at 1105°C for 2 hours and 50 minutes, and then cool the kiln.

4 parts of frit, 1 part of table salt, 26 parts of quartz, 19 parts of potassium feldspar, 9 parts of mullite, 2 parts of polyammonium methacrylate, 1 part of potassium oxide, 2 parts of sodium oxide, 1 part of aluminum oxide, lithium oxide 2 parts, 1 part platinum oxide, 1.2 parts boron oxide, 3 parts calcium oxide, 2 parts magnesium oxide, 3 parts zinc oxide.

The thickness of the glaze layer of the middle layer glaze is 0.20mm.

The purple clay content in the body of purple sand pottery is 56%.

Example 2:

A method for applying glaze to purple sand pottery comprises the following steps:

a) drying the purple sand pottery body in the shade for 7 days, and the drying temperature in the shade is 21°C;

b) into the kiln for plain firing, before the temperature reaches 100°C, the temperature increases by 1°C per minute; after the temperature reaches 100°C, the temperature increases by 1.6°C per minute, and the temperature reaches 500°C; after the temperature reaches 500°C, the temperature Increase by 0.8°C per minute until the temperature reaches 680°C, continue firing for another 4 hours and leave the kiln;

c) Apply the intermediate layer glaze on the surface of the purple sand pottery green body by dipping the glaze method, dry it in the shade, and then put it into the kiln for firing. Fire it at 1200°C for 6 hours and 20 minutes, keep it for 0 minutes, and then cool it down to 270°C. kiln;

d) Apply medium-temperature glaze to the surface of the cooled intermediate layer glaze by spraying, then put it into the kiln, burn it at 1110°C for 2 hours and 10 minutes, and then cool the kiln.

3 parts of frit, 3 parts of table salt, 28 parts of quartz, 16 parts of potassium feldspar, 11 parts of mullite, 2 parts of polyammonium methacrylate, 2 parts of potassium oxide, 3 parts of sodium oxide, 2 parts of aluminum oxide, lithium oxide 1 part, 2 parts platinum oxide, 1 part boron oxide, 2 parts calcium oxide, 3 parts magnesium oxide, 3 parts zinc oxide.

The fineness of the middle layer glaze is 2.2%.

The thickness of the glaze layer of the middle layer glaze is 0.15mm.

The purple clay content in the body of purple sand pottery is 58%.

Example 3:

A method for applying glaze to purple sand pottery comprises the following steps:

a) drying the purple sand pottery body in the shade for 6 days;

b) into the kiln for plain firing, before the temperature reaches 100°C, the temperature increases by 0.6°C per minute; after the temperature reaches 100°C, the temperature increases by 1.5°C per minute, and the temperature reaches 500°C; after the temperature reaches 500°C, the temperature Increase by 1°C per minute until the temperature reaches the specified temperature between 600 and 800°C, then continue firing for 4 hours before leaving the kiln;

c) Apply the intermediate layer glaze on the surface of the purple sand pottery green body by dipping the glaze method, dry it in the shade, and then put it into the kiln for firing. Fire it at 1240°C for 5 hours and 15 minutes, keep it warm for 6 minutes, and then cool it down to 300°C. kiln;

d) Apply medium-temperature glaze to the surface of the cooled intermediate layer glaze by spraying, then put it into the kiln, burn it at 1120°C for 2 hours and 50 minutes, and then cool the kiln.

5 parts of frit, 2 parts of table salt, 25 parts of quartz, 20 parts of potassium feldspar, 10 parts of mullite, 3 parts of polyammonium methacrylate, 3 parts of potassium oxide, 2 parts of sodium oxide, 1 part of aluminum oxide, lithium oxide 2 parts, 1 part of platinum oxide, 0.8 parts of boron oxide, 3 parts of calcium oxide, 2.8 parts of magnesium oxide, and 3 parts of zinc oxide.

The fineness of the middle layer glaze is 2.4%.

The thickness of the glaze layer of the middle layer glaze is 0.12mm.

The purple clay content in the body of purple sand pottery is 70%.

Claims (5)

1. a purple sand ceramics enameling method, is characterized in that, comprises the following steps:

A) purple sand ceramics base substrate is dried in the shade 3 ~ 8 days;

B) enter kiln biscuiting, before temperature reaches 100 DEG C, temperature per minute raises 0.5 ~ 1 DEG C; After temperature reaches 100 DEG C, temperature per minute raises 1 ~ 2 DEG C, and temperature reaches 500 DEG C; After temperature reaches 500 DEG C, temperature per minute raises 0.8 ~ 1.2 DEG C, until after temperature reaches the assigned temperature between 600 ~ 800 DEG C, then continues to fire kiln discharge after 3 ~ 4 hours;

C) execute middle layer glaze to dip in glaze method on purple sand ceramics biscuit surface, and carry out the rear kiln-firing of process that dries in the shade, in 1150 ~ 1250 DEG C, fire 5 ~ 8 hours, be incubated after 0 ~ 10 minute, kiln discharge after being cooled to 270 ~ 300 DEG C;

D) enter kiln after medium temperature glaze is executed in the mode of spary in middle layer glaze surface after the cooling period, in 1100 ~ 1120 DEG C, fire cool cave dwelling after 2 ~ 3 hours;

Wherein, described middle layer glaze comprises the component of following mass ratio: frit 2% ~ 5%, salt 1% ~ 3%, quartz 25% ~ 28%, potassium felspar sand 18% ~ 20%, mullite 7% ~ 10%, ammonium polymethacrylate 2% ~ 3%, potassium oxide 1% ~ 3%, sodium oxide 2% ~ 4%, aluminum oxide 1% ~ 2%, Lithium Oxide 98min 1% ~ 2%, platinum oxide 1% ~ 2%, boron oxide 0.8% ~ 1.5%, calcium oxide 2% ~ 4%, magnesium oxide 2% ~ 3%, zinc oxide 2% ~ 3%.

2. a kind of purple sand ceramics enameling method according to claim 1, is characterized in that, the fineness of described middle layer glaze is 2.2% ~ 2.4%.

3. a kind of purple sand ceramics enameling method according to claim 1, is characterized in that, described temperature of drying in the shade is 19 ~ 21 DEG C.

4. a kind of purple sand ceramics enameling method according to claim 1, is characterized in that, the glazed thickness of described middle layer glaze is 0.08 ~ 0.23mm.

5. a kind of purple sand ceramics enameling method according to claim 1, is characterized in that, the purple cement content in described purple sand ceramics base substrate is 56% ~ 72%.