Method for preparing bright-spotted matte glaze using waste porcelain powder

Abstract

The present invention discloses a method for preparing a bright-spotted matte glaze using waste porcelain powder. The matte glaze comprises the following weight percentages: 10-15% potassium feldspar, 25-30% waste porcelain powder, 5-8% Suzhou clay, 10-15% dolomite, 8-12% zinc oxide, 8-12% lithium feldspar, 10-15% glass powder, 2-5% titanium dioxide, 2-5% barium carbonate, and 3-5% coloring oxide; and the brightening agent comprises the following weight percentages: 20-25% potassium feldspar, 10-15% calcite, 6-10% Suzhou clay, 5-10% bone ash, 5-10% zinc oxide, 4-8% strontium carbonate, 5-10% titanium dioxide, 2-6% fluorite powder, 5-10% barium carbonate, and 15-20% coloring oxide. The product is obtained by preparing the raw materials, applying the glaze, and firing the green body. The bright-spotted matte glaze produced by the present invention has a simple process, strong adaptability, and unique effects, and therefore has broad market prospects.

Description

Technical Field

[0001] The invention belongs to the field of ceramic glazes, and in particular relates to a method for preparing bright-spotted matte glaze by using waste porcelain powder. Background Art

[0002] With the improvement of living standards, people are increasingly pursuing a high quality of life. The items used in daily life are no longer simply satisfied with their use value, but also require ornamental value. In order to meet people's high-quality life needs, flower glazes as artistic porcelain decorations have emerged. The so-called flower glazes are made by formula research, using 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 kiln temperature and atmosphere, the various colored oxides in the glaze blend and react with each other at high temperatures to form a variety of colorful and ever-changing colored glazes, which produce some unexpected and unique decorative effects on the glaze surface. Color spot glaze is a kind of flower glaze, which shows a special decorative effect by spreading spotted crystal flowers of different shapes on the glaze surface. However, in the prior art, spotted glazes and surface glazes 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 bright-spotted matte glaze by using waste porcelain powder, which has simple process, strong adaptability and unique effect.

[0004] The present invention is achieved through the following technical solution: a method for preparing bright-spotted matte glaze using waste porcelain powder, characterized in that it comprises the following steps:

[0005] Step 1: Matte Glaze and Brightener

[0006] 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%, and coloring oxide 3-5%.

[0007] The weight percentage composition of the spot brightening agent raw materials is: potassium feldspar 20-25%, calcite 10-15%, Suzhou soil 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%, and coloring oxide 15-20%;

[0008] Step 2: Preparation of matte glaze and brightener

[0009] Matt glaze: After preparing the matte glaze according to the recipe in step 1, the glaze slurry is obtained by ball milling and sieving. The specific gravity of the glaze slurry is 1.2-1.4 g / cm3 ;

[0010] Spot lightening agent: prepare the spot lightening agent according to the formula of step 1, and then ball mill, dry, calcine, cool, grind and sieve to obtain powder;

[0011] Step 3: Glazing

[0012] Mix glycerin and water in a weight ratio of 1:50, add the brightening agent powder prepared in step 2, then use a brush to dip the brightening agent powder with glycerin and apply it on the surface of the unglazed ceramic body. After drying, spray the matte glaze slurry prepared in step 2 on the surface of the ceramic body.

[0013] Step 4: Firing the green body

[0014] The glazed ceramic body is placed in a kiln and fired in an oxidizing atmosphere. The heating rate from 50 to 1100°C is 3.0 to 4.0°C / min, the heating rate from 1100 to 1180°C is 2.0 to 2.5°C / min, the heating rate from 1180°C to the maximum firing temperature is 1.0 to 1.5°C / min, the holding time at the maximum firing temperature is 1 to 2 hours, and then the product is obtained by cooling with the furnace. The maximum firing temperature is 1230 to 1260°C.

[0015] In the step 1, the raw materials zinc oxide and titanium dioxide are pre-calcined before use to remove organic impurities. The pre-calcination temperature is 1150-1200° C. and the holding time is 30-60 minutes.

[0016] The waste porcelain powder in step 1 is medium-temperature feldspar daily-use ceramics.

[0017] The colored oxide in step 1 is one of Co2O3, Fe2O3, and MnO2.

[0018] The time for the matte glaze ball milling process in step 2 is 6 to 8 hours, the sieve mesh number is 250 mesh, and the sieve residue is 0.5%.

[0019] The ball milling process of the brightening agent in step 2 is performed for 2 hours, the calcination process is performed at a temperature of 1100° C., the cooling process is firstly quenched to 900° C. for 30 minutes, and then naturally cooled to room temperature, the sieving process has a mesh size of 40 to 60 meshes, and the sieve residue is 0.5%.

[0020] In the step 3, the thickness of the brightening agent powder is 1 to 1.5 mm, and the thickness of the matte glaze slurry is 2 to 4 mm.

[0021] The ceramic body after bisque firing in step 3 is a medium-temperature daily-use ceramic clay body, and its water absorption rate is 6-10%.

[0022] The matte glaze formula of the present invention reduces the glaze expansion coefficient by adding lithium feldspar, promotes its mutual bonding with the body and phase separation with the brightening agent, reduces production costs by adding waste porcelain powder, and increases the viscosity of the glaze at high temperatures to limit crystal growth. The kinetic energy of silicon, zinc and titanium crystallization is increased by adding zinc oxide and titanium dioxide as crystallizing agents, while dolomite and barium carbonate are used to assist. Based on the above raw material formula, the present invention generates microcrystals on the glaze surface by controlling the particle size, specific gravity and firing system of the matte glaze slurry, thereby achieving a matte effect.

[0023] The brightening agent formula of the present invention improves the high-temperature fluidity and glossiness of the brightening agent by adding strontium carbonate and barium carbonate, adjusts the expansion coefficient between the body and the brightening agent, and promotes the bonding of the body and glaze. The addition of zinc oxide and titanium dioxide as crystallizing agents, combined with calcite and barium carbonate, assists in increasing the kinetic energy of silicon-zinc-titanium crystallization. The addition of bone ash and fluorite powder promotes the phase separation of matte glaze and brightening agent. Based on the above raw material formula, the present invention first obtains silicon-zinc-titanium seed crystals through calcination and rapid cooling processes, and then promotes the growth of the crystal phase by controlling the particle size of the brightening agent glaze slurry and the firing system, thereby achieving a brightening effect.

[0024] The bright-spotted matte flower glaze of the present invention forms distinct light and dark crystal flowers on the glaze surface by optimizing the formula composition and process parameters, has a significant three-dimensional effect, and can adjust the color of the crystal flowers by adding different coloring oxides as needed, so it has broad market prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a photo of the product obtained in Example 1. DETAILED DESCRIPTION

[0026] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the present invention is described in detail below in conjunction with preferred embodiments.

[0027] Example 1

[0028] A method for preparing a bright-spotted matte glaze using waste porcelain powder comprises the following steps:

[0029] Step 1: Matte Glaze and Brightener

[0030] 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%, lithium feldspar 8%, glass powder 15%, titanium dioxide 5%, barium carbonate 2%, and coloring oxide 5%;

[0031] The weight percentage composition of the spot brightening agent raw materials is: potassium feldspar 20%, calcite 15%, Suzhou soil 6%, bone ash 10%, zinc oxide 5%, strontium carbonate 8%, titanium dioxide 5%, fluorite powder 6%, barium carbonate 5%, and coloring oxide 20%;

[0032] Step 2: Preparation of matte glaze and brightener

[0033] Matt glaze: After preparing the matte glaze according to the recipe in step 1, the glaze slurry is obtained by ball milling and sieving. The specific gravity of the glaze slurry is 1.2g / cm 3 ;

[0034] Spot lightening agent: prepare the spot lightening agent according to the formula of step 1, and then ball mill, dry, calcine, cool, grind and sieve to obtain powder;

[0035] Step 3: Glazing

[0036] Mix glycerin and water in a weight ratio of 1:50, add the brightening agent powder prepared in step 2, then use a brush to dip the brightening agent powder with glycerin and apply it on the surface of the unglazed ceramic body. After drying, spray the matte glaze slurry prepared in step 2 on the surface of the ceramic body.

[0037] Step 4: Firing the green body

[0038] The glazed ceramic body is placed in a kiln and fired 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, and the heating rate from 1180 to 1230°C is 1.0°C / min. The holding time at the highest firing temperature is 1 hour, and then the product is obtained by cooling the furnace.

[0039] In the step 1, the raw materials zinc oxide and titanium dioxide are pre-calcined before use to remove organic impurities. The pre-calcination temperature is 1150° C. and the holding time is 30 minutes.

[0040] The waste porcelain powder in step 1 is medium-temperature feldspar daily-use ceramics.

[0041] The coloring oxide in step 1 is Co2O3.

[0042] The matte glaze ball milling process in step 2 takes 6 hours, the sieve mesh is 250 mesh, and the sieve residue is 0.5%.

[0043] The ball milling process of the brightening agent in step 2 is performed for 2 hours, the calcination process is performed at a temperature of 1100° C., the cooling process is performed by rapidly cooling to 900° C. for 30 minutes, and then naturally cooling to room temperature, the sieving process is performed with a mesh size of 40 and a sieve residue of 0.5%.

[0044] In the step 3, the thickness of the brightening agent powder is 1 mm, and the thickness of the matte glaze slurry is 2 mm.

[0045] The ceramic body after bisque firing in step 3 is a medium-temperature daily-use ceramic clay body, and its water absorption rate is 6%.

[0046] Example 2

[0047] A method for preparing a bright-spotted matte glaze using waste porcelain powder comprises the following steps:

[0048] Step 1: Matte Glaze and Brightener

[0049] The weight percentage composition of the matte glaze raw materials is: 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%, and coloring oxide 3%;

[0050] The weight percentage composition of the spot brightening agent raw materials is: potassium feldspar 25%, calcite 10%, Suzhou soil 10%, bone ash 5%, zinc oxide 10%, strontium carbonate 4%, titanium dioxide 10%, fluorite powder 2%, barium carbonate 9%, and coloring oxide 15%;

[0051] Step 2: Preparation of matte glaze and brightener

[0052] Matt glaze: After preparing the matte glaze according to the recipe in step 1, the glaze slurry is obtained by ball milling and sieving. The specific gravity of the glaze slurry is 1.4g / cm 3 ;

[0053] Spot lightening agent: prepare the spot lightening agent according to the formula of step 1, and then ball mill, dry, calcine, cool, grind and sieve to obtain powder;

[0054] Step 3: Glazing

[0055] Mix glycerin and water in a weight ratio of 1:50, add the brightening agent powder prepared in step 2, then use a brush to dip the brightening agent powder with glycerin and apply it on the surface of the unglazed ceramic body. After drying, spray the matte glaze slurry prepared in step 2 on the surface of the ceramic body.

[0056] Step 4: Firing the green body

[0057] The glazed ceramic body is placed in a kiln and fired 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, and the heating rate from 1180 to 1260°C is 1.5°C / min. The holding time at the highest firing temperature is 2 hours, and then the product is obtained by cooling the furnace.

[0058] In the step 1, the raw materials zinc oxide and titanium dioxide are pre-calcined before use to remove organic impurities. The pre-calcination temperature is 1200° C. and the holding time is 60 minutes.

[0059] The waste porcelain powder in step 1 is medium-temperature feldspar daily-use ceramics.

[0060] The colored oxide in step 1 is Fe2O3.

[0061] The matte glaze ball milling process in step 2 takes 8 hours, the sieve mesh is 250 mesh, and the sieve residue is 0.5%.

[0062] The ball milling process of the brightening agent in step 2 is performed for 2 hours, the calcination process is performed at a temperature of 1100° C., the cooling process is performed by rapidly cooling to 900° C. for 30 minutes, and then naturally cooling to room temperature, the sieving process is performed with a mesh size of 60 and a sieve residue of 0.5%.

[0063] The thickness of the brightening agent powder in step three is 1.5 mm, and the thickness of the matte glaze slurry is 4 mm.

[0064] The ceramic body after bisque firing in the step 3 is a medium-temperature daily-use ceramic clay body, and its water absorption rate is 10%.

[0065] Example 3

[0066] A method for preparing a bright-spotted matte glaze using waste porcelain powder comprises the following steps:

[0067] Step 1: Matte Glaze and Brightener

[0068] 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%, and coloring oxide 4%.

[0069] The weight percentage composition of the spot brightening agent raw materials is: potassium feldspar 23%, calcite 14%, Suzhou soil 8%, bone ash 6%, zinc oxide 6%, strontium carbonate 6%, titanium dioxide 7%, fluorite powder 3%, barium carbonate 10%, and coloring oxide 17%;

[0070] Step 2: Preparation of matte glaze and brightener

[0071] Matt glaze: After the matte glaze is prepared according to the recipe in step 1, it is ball-milled and sieved to obtain the glaze slurry. The specific gravity of the glaze slurry is 1.3g / cm 3 ;

[0072] Spot lightening agent: prepare the spot lightening agent according to the formula of step 1, and then ball mill, dry, calcine, cool, grind and sieve to obtain powder;

[0073] Step 3: Glazing

[0074] Mix glycerin and water in a weight ratio of 1:50, add the brightening agent powder prepared in step 2, then use a brush to dip the brightening agent powder with glycerin and apply it on the surface of the unglazed ceramic body. After drying, spray the matte glaze slurry prepared in step 2 on the surface of the ceramic body.

[0075] Step 4: Firing the green body

[0076] The glazed ceramic body is placed in a kiln and fired 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, and the heating rate from 1180 to 1240°C is 1.3°C / min. The holding time at the highest firing temperature is 1.5h, and then the product is obtained by cooling the furnace.

[0077] In the step 1, the raw materials zinc oxide and titanium dioxide are pre-calcined before use to remove organic impurities. The pre-calcination temperature is 1170° C. and the holding time is 45 minutes.

[0078] The waste porcelain powder in step 1 is medium-temperature feldspar daily-use ceramics.

[0079] The coloring oxide in step 1 is MnO2.

[0080] The matte glaze ball milling process in step 2 takes 7 hours, the sieve mesh is 250 mesh, and the sieve residue is 0.5%.

[0081] The ball milling process of the brightening agent in step 2 is performed for 2 hours, the calcination process is performed at a temperature of 1100° C., the cooling process is performed by rapidly cooling to 900° C. for 30 minutes, and then naturally cooling to room temperature, the sieving process is performed with a mesh size of 50 and a sieve residue of 0.5%.

[0082] The thickness of the brightening agent powder in step three is 1.2 mm, and the thickness of the matte glaze slurry is 3 mm.

[0083] The ceramic body after bisque firing in step 3 is a medium-temperature daily-use ceramic clay body, and its water absorption rate is 8%.

Claims

1. A method for preparing bright-spotted matte glaze using waste porcelain powder, characterized by: The process includes the following steps: Step 1: Matte Glaze and Brightener 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%, and coloring oxide 3-5%. The weight percentage composition of the spot brightening agent raw materials is: potassium feldspar 20-25%, calcite 10-15%, Suzhou soil 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%, and coloring oxide 15-20%; Step 2: Preparation of matte glaze and brightener Matt glaze: After preparing the matte glaze according to the recipe in step 1, the glaze slurry is obtained by ball milling and sieving. The specific gravity of the glaze slurry is 1.2-1.4 g / cm 3 ; Spot lightening agent: prepare the spot lightening agent according to the formula of step 1, and then ball mill, dry, calcine, cool, grind and sieve to obtain powder; Step 3: Glazing Mix glycerin and water in a weight ratio of 1:50, add the brightening agent powder prepared in step 2, then use a brush to dip the brightening agent powder with glycerin and apply it on the surface of the unglazed ceramic body. After drying, spray the matte glaze slurry prepared in step 2 on the surface of the ceramic body. Step 4: Firing the green body The glazed ceramic body is placed in a kiln and fired in an oxidizing atmosphere. The heating rate from 50 to 1100°C is 3.0 to 4.0°C / min, the heating rate from 1100 to 1180°C is 2.0 to 2.5°C / min, the heating rate from 1180°C to the maximum firing temperature is 1.0 to 1.5°C / min, the holding time at the maximum firing temperature is 1 to 2 hours, and then the product is obtained by cooling the furnace. The maximum firing temperature is 1230 to 1260°C. The matte glaze ball milling process in step 2 is performed for 6 to 8 hours, the sieve mesh is 250 mesh, and the sieve residue is 0.5%; The ball milling time of the brightening agent in step 2 is 2 hours, the calcination temperature is 1100 ° C, the cooling process is first quenched to 900 ° C for 30 minutes, and then naturally cooled to room temperature, the sieving process is 40-60 mesh, and the sieve residue is 0.5%; In the step 3, the thickness of the brightening agent powder is 1 to 1.5 mm, and the thickness of the matte glaze slurry is 2 to 4 mm.

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

3. The method according to claim 1, wherein: The waste porcelain powder in step 1 is medium-temperature feldspar daily-use ceramics.

4. The method according to claim 1, wherein: The colored oxide in step 1 is one of Co2O3, Fe2O3, and MnO2.

5. The method according to claim 1, wherein: The ceramic body after bisque firing in step 3 is a medium-temperature daily-use ceramic clay body, and its water absorption rate is 6-10%.

Images