Method for preparing bright-spot matt fancy glaze from waste porcelain powder

Abstract

The invention discloses a method for preparing bright-spot matt fancy glaze from waste porcelain powder. The matt glaze comprises the following components in percentage by weight: 10-15% of potassium feldspar, 25-30% of waste porcelain powder, 5-8% of Suzhou clay, 10-15% of dolomite, 8-12% of zinc oxide, 8-12% of lithium feldspar, 10-15% of glass powder, 2-5% of titanium dioxide, 2-5% of barium carbonate and 3-5% of coloring oxide. The speckle removing agent comprises the following components in percentage by weight: 20-25% of potassium feldspar, 10-15% of calcite, 6-10% of Suzhou clay, 5-10% of bone ash, 5-10% of zinc oxide, 4-8% of strontium carbonate, 5-10% of titanium dioxide, 2-6% of fluorite powder, 5-10% of barium carbonate and 15-20% of coloring oxide. The product is obtained by raw material preparation, glazing and green body firing. The bright-spot matt fancy glaze prepared by the invention is simple in process, high in adaptability and unique in effect, so that the bright-spot matt fancy glaze has a wide market prospect.

Description

Technical Field

[0001] The present invention belongs to the field of ceramic glazes, and particularly relates to a method for preparing a bright-spot matte decorative glaze using waste porcelain powder. Background Art

[0002] With the improvement of living standards, people are increasingly pursuing high-quality living quality. The items used in daily life no longer simply satisfy their use value, but also require ornamental value. To meet people's high-quality living needs, decorative glazes for art porcelain have emerged as the times require. So-called decorative glazes are, through formula research, with quartz and feldspar as the main raw materials, adding colorants to the glaze, and adopting different glazing methods and firing systems. With the subtle changes in the kiln temperature and atmosphere, the coloring oxides in the glaze interact and react with each other at high temperatures, forming various colorful and ever-changing colored glazes, creating some unexpected and peculiar decorative effects on the glaze surface. Spotted glaze is a type of decorative glaze, which shows special decorative effects by spreading different-shaped spotted crystal flowers on the glaze surface. However, in the prior art, the spotted glaze and the surface glaze have the same glossiness after firing, resulting in a certain artistic effect on the glaze surface, but the three-dimensional sense of the product glaze is not strong. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a method for preparing a bright-spot matte decorative glaze using waste porcelain powder, which has simple process, strong adaptability and unique effects.

[0004] The present invention is achieved through the following technical solutions: A method for preparing a bright-spot matte decorative glaze using waste porcelain powder, characterized by comprising the following steps: Step 1: Matte glaze and bright-spot agent The weight percentage composition of the raw materials of the matte glaze is: potassium feldspar 10-15%, waste porcelain powder 25-30%, Suzhou clay 5-8%, dolomite 10-15%, zinc oxide 8-12%, lithium feldspar 8-12%, glass powder 10-15%, titanium dioxide 2-5%, barium carbonate 2-5%, coloring oxide 3-5%; The weight percentage composition of the raw materials of the bright-spot agent is: potassium feldspar 20-25%, calcite 10-15%, Suzhou clay 6-10%, bone ash 5-10%, zinc oxide 5-10%, strontium carbonate 4-8%, titanium dioxide 5-10%, fluorite powder 2-6%, barium carbonate 5-10%, coloring oxide 15-20%; Step 2: Preparation of the matte glaze and the bright-spot agent Matte glaze: After proportioning the matte glaze according to the formula in Step 1, it is ball-milled and sieved to obtain a glaze slurry, and the specific gravity of the glaze slurry is 1.2-1.4 g / cm 3 ; Bright-spot agent: After proportioning the bright-spot agent according to the formula in Step 1, it is ball-milled, dried, calcined, cooled, ground and sieved to obtain a powder; Step 3: Glazing Mix glycerol and water evenly at a weight ratio of 1:50, put the bright spot agent powder obtained in Step 2, then dip a writing brush into the bright spot agent powder with glycerol and apply it on the surface of the bisque-fired ceramic body. After air drying, spray the matte glaze slip obtained in Step 2 on the surface of the ceramic body; Step 4: Firing the Body Put the glazed ceramic body into a kiln and fire it in an oxidizing atmosphere. The heating rate from 50 to 1100 °C is 3.0 - 4.0 °C / min, the heating rate from 1100 to 1180 °C is 2.0 - 2.5 °C / min, the heating rate from 1180 °C to the maximum firing temperature is 1.0 - 1.5 °C / min, the holding time at the maximum firing temperature is 1 - 2 h, and then cool it with the furnace to obtain the product. The maximum firing temperature is 1230 - 1260 °C.

[0005] In the above Step 1, the raw materials zinc oxide and titanium dioxide need to be pre-calcined before use to remove organic impurities. The pre-calcination temperature is 1150 - 1200 °C, and the holding time is 30 - 60 min.

[0006] The waste porcelain powder in the above Step 1 is medium-temperature feldspar-based domestic ceramics.

[0007] The coloring oxide in the above Step 1 is one of Co2O3, Fe2O3, and MnO2.

[0008] The time for the ball milling process of the matte glaze in the above Step 2 is 6 - 8 h, the mesh number for sieving is 250 meshes, and the sieve residue is 0.5%.

[0009] The time for the ball milling process of the bright spot agent in the above Step 2 is 2 h, the temperature for the calcination process is 1100 °C, the cooling process is to first rapidly cool to 900 °C in 30 min and then naturally cool to room temperature, the mesh number for the sieving process is 40 - 60 meshes, and the sieve residue is 0.5%.

[0010] The thickness of the bright spot agent powder in the above Step 3 is 1 - 1.5 mm, and the thickness of the matte glaze slip is 2 - 4 mm.

[0011] The bisque-fired ceramic body in the above Step 3 is a medium-temperature domestic ceramic body, and its water absorption rate is 6 - 10%.

[0012] In the formula of the matte glaze of the present invention, adding feldspar spodumene can reduce the expansion coefficient of the glaze surface, promote its mutual combination with the body and the phase separation formation with the bright spot agent. Adding waste porcelain powder can reduce the production cost and at the same time increase the viscosity of the glaze surface at the high-temperature stage to limit the growth of crystals. Adding zinc oxide and titanium white powder as crystal formers, and cooperating with dolomite and barium carbonate to assist in increasing the kinetic energy of silicon zinc titanium crystallization. On the basis of the above raw material formula, the present invention controls the particle size, specific gravity and firing system of the matte glaze slurry to generate microcrystals on the glaze surface, thereby achieving a matte effect; In the formula of the bright spot agent of the present invention, adding strontium carbonate and barium carbonate can improve the high-temperature fluidity and gloss of the bright spot agent, adjust the expansion coefficient between the body and the bright spot agent to promote the combination of the body and the glaze. Adding zinc oxide and titanium white powder as crystal formers, and cooperating with calcite and barium carbonate to assist in increasing the kinetic energy of silicon zinc titanium crystallization. Adding bone ash and fluorite powder promotes the phase separation formation of the matte glaze and the bright spot agent. On the basis of the above raw material formula, the present invention first obtains silicon zinc titanium crystal seeds through calcination and rapid cooling processes, and then controls the particle size of the bright spot agent glaze slurry and the firing system to promote the growth of the crystal phase, thereby achieving a bright light effect; The bright spot matte decorative glaze of the present invention forms distinct bright and dark crystal flowers on the glaze surface by optimizing the formula composition and process parameters, has a remarkable three-dimensional effect, and can adjust the crystal flower color by adding different coloring oxides as needed, so it has a broad market prospect. Description of the Drawings

[0013] Figure 1 It is a physical photo of the product obtained in Example 1. Detailed Embodiments

[0014] To further illustrate the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the present invention will be described in detail below in conjunction with preferred embodiments.

[0015] Example 1

[0016] A method for preparing a bright spot matte decorative glaze using waste porcelain powder, comprising the following steps: Step 1: Matte glaze and bright spot agent The weight percentage composition of the matte glaze raw materials is: potassium feldspar 10%, waste porcelain powder 27%, Suzhou clay 5%, dolomite 15%, zinc oxide 8%, feldspar spodumene 8%, glass powder 15%, titanium white powder 5%, barium carbonate 2%, coloring oxide 5%; The weight percentage composition of the bright spot agent raw materials is: potassium feldspar 20%, calcite 15%, Suzhou clay 6%, bone ash 10%, zinc oxide 5%, strontium carbonate 8%, titanium white powder 5%, fluorite powder 6%, barium carbonate 5%, coloring oxide 20%; Step 2: Preparation of matte glaze and bright spot agent Matte glaze: After formulating the matte glaze according to the recipe in Step 1, the glaze slurry is prepared by ball milling and sieving. The specific gravity of the glaze slurry is 1.2 g / cm 3 ; Bright spot agent: After formulating the bright spot agent according to the recipe in Step 1, the powder is prepared by ball milling, drying, calcining, cooling, grinding, and sieving; Step 3: Glazing Mix glycerol and water evenly at a weight ratio of 1:50, put the bright spot agent powder prepared in Step 2, and then dip a writing brush in the bright spot agent powder with glycerol and apply it on the surface of the bisque-fired ceramic body. After air drying, spray the matte glaze slurry prepared in Step 2 on the surface of the ceramic body; Step 4: Firing the body Put the glazed ceramic body into a kiln and fire it in an oxidizing atmosphere. The heating rate from 50 to 1100 °C is 3.0 °C / min, the heating rate from 1100 to 1180 °C is 2.0 °C / min, the heating rate from 1180 to 1230 °C is 1.0 °C / min, and the holding time at the highest firing temperature is 1 h. Then cool it with the furnace to obtain the product.

[0017] In the above Step 1, the raw materials zinc oxide and titanium dioxide need to be pre-calcined before use to remove organic impurities. The pre-calcination temperature is 1150 °C and the holding time is 30 min.

[0018] The waste porcelain powder in Step 1 is medium-temperature feldspar-based daily-use ceramics.

[0019] The coloring oxide in Step 1 is Co2O3.

[0020] In Step 2, the time for the ball milling process of the matte glaze is 6 h, the sieving mesh size is 250 mesh, and the screen residue is 0.5%.

[0021] In Step 2, the time for the ball milling process of the bright spot agent is 2 h, the temperature for the calcination process is 1100 °C, the cooling process is to first rapidly cool to 900 °C in 30 min and then naturally cool to room temperature, the mesh size for the sieving process is 40 mesh, and the screen residue is 0.5%.

[0022] In Step 3, the thickness of the bright spot agent powder is 1 mm, and the thickness of the matte glaze slurry is 2 mm.

[0023] The bisque-fired ceramic body in Step 3 is a medium-temperature daily-use ceramic body with a water absorption rate of 6%.

[0024] Example 2

[0025] A method for preparing bright spot matte decorative glaze using waste porcelain powder, comprising the following steps: Step 1: Matte glaze and bright spot agent The weight percentage composition of the raw materials for the matte glaze is as follows: potassium feldspar 15%, waste porcelain powder 30%, Suzhou clay 8%, dolomite 10%, zinc oxide 9%, lithium feldspar 10%, glass powder 10%, titanium dioxide 2%, barium carbonate 3%, coloring oxide 3%; The weight percentage composition of the raw materials for the bright spot agent is as follows: potassium feldspar 25%, calcite 10%, Suzhou clay 10%, bone ash 5%, zinc oxide 10%, strontium carbonate 4%, titanium dioxide 10%, fluorite powder 2%, barium carbonate 9%, coloring oxide 15%; Step 2: Preparation of the matte glaze and the bright spot agent Matte glaze: After proportioning the matte glaze according to the formula in Step 1, glaze slurry is obtained through ball milling and sieving. The specific gravity of the glaze slurry is 1.4 g / cm 3 ; Bright spot agent: After proportioning the bright spot agent according to the formula in Step 1, powder is obtained through ball milling, drying, calcination, cooling, grinding, and sieving; Step 3: Glazing Mix glycerol and water evenly at a weight ratio of 1:50, put the powder of the bright spot agent prepared in Step 2 into it, then dip a writing brush in the bright spot agent powder with glycerol and apply it on the surface of the bisque-fired ceramic body. After air drying, spray the glaze slurry of the matte glaze prepared in Step 2 on the surface of the ceramic body; Step 4: Firing of the body Put the glazed ceramic body into a kiln and fire it in an oxidizing atmosphere. The heating rate from 50 to 1100 °C is 4.0 °C / min, the heating rate from 1100 to 1180 °C is 2.5 °C / min, the heating rate from 1180 to 1260 °C is 1.5 °C / min, the holding time at the highest firing temperature is 2 h, and then cool it with the furnace to obtain the product.

[0026] In Step 1, before use, the raw materials zinc oxide and titanium dioxide need to be pre-calcined to remove organic impurities. The pre-calcination temperature is 1200 °C and the holding time is 60 min.

[0027] The waste porcelain powder in Step 1 is medium-temperature feldspar-based daily-use ceramics.

[0028] The coloring oxide in Step 1 is Fe2O3.

[0029] In Step 2, the time for the ball milling process of the matte glaze is 8 h, the sieving mesh number is 250 meshes, and the sieve residue is 0.5%.

[0030] In Step 2, the time for the ball milling process of the bright spot agent is 2 h, the temperature for the calcination process is 1100 °C, the cooling process is to first rapidly cool to 900 °C in 30 min and then naturally cool to room temperature, the mesh number for the sieving process is 60 meshes, and the sieve residue is 0.5%.

[0031] In Step 3, the thickness of the bright spot agent powder is 1.5 mm, and the thickness of the matte glaze slurry is 4 mm.

[0032] In Step 3, the bisque-fired ceramic body is a medium-temperature daily-use ceramic body, and its water absorption rate is 10%.

[0033] Example 3

[0034] A method for preparing bright spot matte decorative glaze using waste porcelain powder includes the following steps: Step 1: Matte glaze and bright spot agent The weight percentage composition of the matte glaze raw materials is: potassium feldspar 11%, waste porcelain powder 25%, Suzhou clay 6%, dolomite 11%, zinc oxide 12%, lithium feldspar 12%, glass powder 11%, titanium dioxide 3%, barium carbonate 5%, coloring oxide 4%; The weight percentage composition of the bright spot agent raw materials is: potassium feldspar 23%, calcite 14%, Suzhou clay 8%, bone ash 6%, zinc oxide 6%, strontium carbonate 6%, titanium dioxide 7%, fluorite powder 3%, barium carbonate 10%, coloring oxide 17%; Step 2: Preparation of matte glaze and bright spot agent Matte glaze: After proportioning the matte glaze according to the formula in Step 1, it is ball-milled and sieved to obtain a glaze slurry, and the specific gravity of the glaze slurry is 1.3 g / cm 3 ; Bright spot agent: After proportioning the bright spot agent according to the formula in Step 1, it is ball-milled, dried, calcined, cooled, ground, and sieved to obtain a powder; Step 3: Glazing Mix glycerol and water evenly at a weight ratio of 1:50, put the bright spot agent powder prepared in Step 2 into it, then dip a writing brush into the bright spot agent powder with glycerol and apply it on the surface of the bisque-fired ceramic body. After air-drying, spray the matte glaze slurry prepared in Step 2 on the surface of the ceramic body; Step 4: Firing of the body Put the glazed ceramic body into a kiln and fire it in an oxidizing atmosphere. The heating rate from 50 to 1100 °C is 3.5 °C / min, the heating rate from 1100 to 1180 °C is 2.2 °C / min, the heating rate from 1180 to 1240 °C is 1.3 °C / min, the holding time at the highest firing temperature is 1.5 h, and then it is cooled with the furnace to obtain the product.

[0035] In Step 1, before using the raw materials zinc oxide and titanium dioxide, they need to be pre-calcined to remove organic impurities. The pre-calcination temperature is 1170 °C, and the holding time is 45 min.

[0036] The waste porcelain powder in Step 1 is medium-temperature feldspathic daily-use ceramics.

[0037] The coloring oxide in Step 1 is MnO2.

[0038] In the second step, the time of the matte glaze ball milling process is 7 h, the mesh number for sieving is 250 meshes, and the sieve residue is 0.5%.

[0039] In the second step, the time of the bright spot agent ball milling process is 2 h, the temperature of the calcination process is 1100 °C, the cooling process is to rapidly cool to 900 °C in 30 min first, and then naturally cool to room temperature. The mesh number of the sieving process is 50 meshes, and the sieve residue is 0.5%.

[0040] In the third step, the thickness of the bright spot agent powder is 1.2 mm, and the thickness of the matte glaze slurry is 3 mm.

[0041] In the third step, the unfired ceramic body is a medium-temperature daily-use ceramic clay body, and its water absorption rate is 8%.

Claims

1. A method for preparing a bright-spot matte glaze using waste porcelain powder, characterized in that: It includes the following steps: Step 1: Matte glaze and bright spot agent The weight percentage composition of the matte glaze raw materials is: potassium feldspar 10 - 15%, waste porcelain powder 25 - 30%, Suzhou clay 5 - 8%, dolomite 10 - 15%, zinc oxide 8 - 12%, lithium feldspar 8 - 12%, glass powder 10 - 15%, titanium dioxide 2 - 5%, barium carbonate 2 - 5%, coloring oxide 3 - 5%; The weight percentage composition of the bright spot agent raw materials is: potassium feldspar 20 - 25%, calcite 10 - 15%, Suzhou clay 6 - 10%, bone ash 5 - 10%, zinc oxide 5 - 10%, strontium carbonate 4 - 8%, titanium dioxide 5 - 10%, fluorite powder 2 - 6%, barium carbonate 5 - 10%, coloring oxide 15 - 20%; Step 2: Preparation of matte glaze and bright spot agent Matte glaze: After formulating the matte glaze according to the recipe in Step 1, the glaze slurry is prepared by ball milling and sieving. The specific gravity of the glaze slurry is 1.2 - 1.4 g / cm 3 ; Bright spot agent: After proportioning the bright spot agent according to the formula in Step 1, it is made into a powder through ball milling, drying, calcination, cooling, grinding, and sieving; Step 3: Glazing Mix glycerol and water evenly at a weight ratio of 1:50, put the bright spot agent powder prepared in Step 2 into it, then dip a writing brush in the bright spot agent powder with glycerol and apply it on the surface of the bisque-fired ceramic body. After air drying, spray the matte glaze slurry prepared in Step 2 on the surface of the ceramic body; Step 4: Firing of the body Put the glazed ceramic body into a kiln and fire it in an oxidizing atmosphere. The heating rate from 50 to 1100 °C is 3.0 - 4.0 °C / min, the heating rate from 1100 to 1180 °C is 2.0 - 2.5 °C / min, the heating rate from 1180 °C to the highest firing temperature is 1.0 - 1.5 °C / min, the holding time at the highest firing temperature is 1 - 2 h, and then it is cooled with the furnace to obtain the product. The highest firing temperature is 1230 - 1260 °C.

2. The method according to claim 1, wherein: In the above Step 1, the raw materials zinc oxide and titanium dioxide need to be pre-calcined before use to remove organic impurities. The pre-calcination temperature is 1150 - 1200 °C, and the holding time is 30 - 60 min.

3. The method according to claim 1, characterized in that: The waste porcelain powder in the above Step 1 is medium-temperature feldspar-based household ceramics.

4. The method according to claim 1, characterized in that: The coloring oxide in the above Step 1 is one of Co2O3, Fe2O3, and MnO2.

5. The method according to claim 1, characterized in that: In the above Step 2, the time of the ball milling process for the matte glaze is 6 - 8 h, the sieving mesh number is 250 meshes, and the sieve residue is 0.5%.

6. The method according to claim 1, characterized in that: In the above Step 2, the time of the ball milling process for the bright spot agent is 2 h, the temperature of the calcination process is 1100 °C, the cooling process is to first rapidly cool to 900 °C in 30 min and then naturally cool to room temperature, the sieving mesh number of the sieving process is 40 - 60 meshes, and the sieve residue is 0.5%.

7. The method according to claim 1, wherein: In the above Step 3, the thickness of the bright spot agent powder is 1 - 1.5 mm, and the thickness of the matte glaze slurry is 2 - 4 mm.

8. The method according to claim 1, wherein: The bisque-fired ceramic body in the above Step 3 is a medium-temperature household ceramic body, and its water absorption rate is 6 - 10%.

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