CN111675534B - Heat-resistant porcelain with high thermal shock resistance - Google Patents

Heat-resistant porcelain with high thermal shock resistance Download PDF

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CN111675534B
CN111675534B CN202010594513.5A CN202010594513A CN111675534B CN 111675534 B CN111675534 B CN 111675534B CN 202010594513 A CN202010594513 A CN 202010594513A CN 111675534 B CN111675534 B CN 111675534B
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heat
firing
resistant porcelain
resistant
sieving
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CN111675534A (en
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蔡玲玲
赵楠
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Jingdezhen Folk Culture Porcelain Industry Co ltd
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Jingdezhen Folk Culture Porcelain Industry Co ltd
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Abstract

The invention relates to a heat-resistant porcelain with high thermal shock resistance, which adopts natural mineral raw materials and industrial chemical raw materials according to the weight percentage of the materials: 25-30% of lithium porcelain stone, 20-30% of kaolin, 10-15% of magnesium carbonate, 15-20% of bauxite, 2-5% of ammonium molybdate, 5-10% of spodumene and 5-10% of potassium feldspar, and performing the working procedures of proportioning, ball milling, adding 10-15% of a pre-firing material, uniformly mixing, sieving, press-filtering, mud pressing, pugging, ageing, molding, drying, glazing, secondary drying and firing to obtain the heat-resistant porcelain product. The production method is scientific and reasonable, advanced in process technology, easy to implement, high in yield and good in product quality, and can greatly improve the thermal stability and mechanical strength of the product, so that the method has a wide market prospect.

Description

Heat-resistant porcelain with high thermal shock resistance
Technical Field
The invention relates to the technical field of ceramics, in particular to a heat-resistant porcelain with high thermal shock resistance.
Background
Most of the existing heat-resistant ceramic products are added with a large amount of spodumene to generate Li2O·Al2O3·SiO2The system improves the thermal shock resistance of the product, along with the development of the society and the improvement of living standard, the requirements of people on ceramic products are improved more and more, the mechanical strength and the thermal shock resistance of the current heat-resistant ceramic product can not meet the requirements of various cooking modes, the product is easy to break and damage in a rapid cooling and instant heating environment, and the application range of the product is severely limited. Therefore, the invention of a heat-resistant porcelain product with good thermal shock resistance under high temperature conditions is needed.
Disclosure of Invention
The invention aims to solve the technical problem of providing the heat-resistant porcelain with high thermal shock resistance, simple process, low cost and excellent quality.
The technical scheme of the invention is as follows: a heat-resistant porcelain with high thermal shock resistance is characterized in that: the method adopts natural mineral raw materials and industrial chemical raw materials, and comprises the following components in percentage by weight: 25-30% of lithium porcelain stone, 20-30% of kaolin, 10-15% of magnesium carbonate, 15-20% of bauxite, 2-5% of ammonium molybdate, 5-10% of spodumene and 5-10% of potassium feldspar, and performing the working procedures of proportioning, ball milling, adding 10-15% of a pre-firing material, uniformly mixing, sieving, press-filtering, mud pressing, pugging, ageing, molding, drying, glazing, secondary drying and firing to obtain the heat-resistant porcelain product.
The pre-sintering material comprises the following materials in percentage by mass: 25-35% of magnesium phosphate, 20-30% of alumina, 20-25% of quartz and 15-20% of albite.
The particle fineness of the pre-sintered material is that the pre-sintered material is sieved by a 500-mesh sieve, and the residue on the sieve is less than 0.5%; the firing temperature of the pre-firing material is 1200 ℃.
The firing system of the pre-firing material is as follows: the temperature is raised from the normal temperature to 1200 ℃ at the speed of 1.5 ℃/min.
The parameters of the sieving process are as follows: sieving with 300 mesh sieve to obtain residue less than 0.5%.
The forming process adopts press forming.
The time of the staling process is 5 days.
The firing system of the firing procedure is as follows: heating from normal temperature to 900 ℃ at the speed of 3 ℃/min, then heating to 1230 ℃ at the speed of 1 ℃/min, preserving heat for 20min, then heating to 1280-1340 ℃ at the speed of 2 ℃/min, and preserving heat for 30 min.
The glaze used in the glazing procedure comprises the following materials in percentage by mass: 15-40% of spodumene, 20-40% of spodumene, 10-15% of kaolin, 2-10% of quartz, 5-10% of potash feldspar, 5-10% of barium sulfate and 3-6% of zinc oxide nanofiber.
The thermal expansion coefficient of the heat-resistant porcelain product is 0.5-1 multiplied by 10-6The crack is not generated when the heat exchange is carried out for three times at 800-20 ℃, and the breaking strength is 180-200 Mpa.
Because the formula of the raw materials for preparing the heat-resistant porcelain at present can not meet the requirement of the invention on the heat-resistant impact performance of a porcelain body, magnesia-alumina spinel and mullite microcrystal grains are introduced into the formula of a heat-resistant porcelain body through a pre-sintered material, and the mixed growth of spinel and mullite crystal phases in the body is realized by adjusting the formula composition of the body raw materials and strictly controlling the firing system, so that the microstructure components in the heat-resistant porcelain are enhanced, the integral mechanical strength of the heat-resistant porcelain is improved, the firing temperature range of the heat-resistant porcelain is widened, the heat-resistant impact performance of the heat-resistant porcelain under the high-temperature condition is enhanced, and the service performance of the heat-resistant porcelain is further enhanced. The production method is scientific and reasonable, advanced in process technology, easy to implement, high in yield and good in product quality, and can greatly improve the thermal stability and mechanical strength of the product, so that the method has a wide market prospect.
Detailed Description
To further illustrate the present invention and the technical means and effects thereof adopted to achieve the predetermined object, the present invention will be described in detail with reference to the preferred embodiments as follows:
example 1
A heat-resistant porcelain with high thermal shock resistance is characterized in that: the method adopts natural mineral raw materials and industrial chemical raw materials, and comprises the following components in percentage by weight: 25% of lithium porcelain stone, 28% of kaolin, 10% of magnesium carbonate, 20% of bauxite, 2% of ammonium molybdate, 10% of spodumene and 5% of potash feldspar, and the heat-resistant porcelain product is obtained through the working procedures of burdening, ball milling, addition of 10% of pre-firing material, uniform mixing, sieving, press-filtering and mud pressing, pugging, ageing, molding, drying, glazing, secondary drying and firing.
The pre-sintering material comprises the following materials in percentage by mass: 30% of magnesium phosphate, 30% of alumina, 20% of quartz and 20% of albite.
The particle fineness of the pre-sintered material is that the pre-sintered material is sieved by a 500-mesh sieve, and the residue on the sieve is less than 0.5%; the firing temperature of the pre-firing material is 1200 ℃.
The firing system of the pre-firing material is as follows: the temperature is raised from the normal temperature to 1200 ℃ at the speed of 1.5 ℃/min.
The parameters of the sieving process are as follows: sieving with 300 mesh sieve to obtain residue less than 0.5%.
The forming process adopts press forming.
The time of the staling process is 5 days.
The firing system of the firing procedure is as follows: heating from normal temperature to 900 deg.C at 3 deg.C/min, heating to 1230 deg.C at 1 deg.C/min, maintaining for 20min, heating to 1320 deg.C at 2 deg.C/min, and maintaining for 30 min.
The glaze used in the glazing procedure comprises the following materials in percentage by mass: 19% of lithium porcelain stone, 40% of spodumene, 10% of kaolin, 10% of quartz, 5% of potassium feldspar, 10% of barium sulfate and 6% of zinc oxide nano fiber.
The thermal expansion coefficient of the heat-resistant porcelain product is 0.56 multiplied by 10-6The crack is avoided after three heat exchanges at 800-20 ℃, and the breaking strength is 183 Mpa.
Example 2
A heat-resistant porcelain with high thermal shock resistance is characterized in that: the method adopts natural mineral raw materials and industrial chemical raw materials, and comprises the following components in percentage by weight: 30% of lithium porcelain stone, 20% of kaolin, 15% of magnesium carbonate, 15% of bauxite, 5% of ammonium molybdate, 5% of spodumene and 10% of potash feldspar, and the heat-resistant porcelain product is obtained through the working procedures of burdening, ball milling, addition of a pre-firing material by 12%, uniform mixing, sieving, press-filtering and mud pressing, pugging, ageing, molding, drying, glazing, secondary drying and firing.
The pre-sintering material comprises the following materials in percentage by mass: 35% of magnesium phosphate, 30% of alumina, 20% of quartz and 15% of albite.
The particle fineness of the pre-sintered material is that the pre-sintered material is sieved by a 500-mesh sieve, and the residue on the sieve is less than 0.5%; the firing temperature of the pre-firing material is 1200 ℃.
The firing system of the pre-firing material is as follows: the temperature is raised from the normal temperature to 1200 ℃ at the speed of 1.5 ℃/min.
The parameters of the sieving process are as follows: sieving with 300 mesh sieve to obtain residue less than 0.5%.
The forming process adopts press forming.
The time of the staling process is 5 days.
The firing system of the firing procedure is as follows: heating from normal temperature to 900 deg.C at a rate of 3 deg.C/min, heating to 1230 deg.C at a rate of 1 deg.C/min, maintaining for 20min, heating to 1290 deg.C at a rate of 2 deg.C/min, and maintaining for 30 min.
The glaze used in the glazing procedure comprises the following materials in percentage by mass: 40% of lithium porcelain stone, 25% of spodumene, 15% of kaolin, 2% of quartz, 10% of potash feldspar, 5% of barium sulfate and 3% of zinc oxide nanofiber.
The thermal expansion coefficient of the heat-resistant porcelain product is 0.62 multiplied by 10-6The crack is avoided after three heat exchanges at 800-20 ℃, and the breaking strength is 188 Mpa.
Example 3
A heat-resistant porcelain with high thermal shock resistance is characterized in that: the method adopts natural mineral raw materials and industrial chemical raw materials, and comprises the following components in percentage by weight: 28% of lithium porcelain stone, 25% of kaolin, 12% of magnesium carbonate, 17% of bauxite, 3% of ammonium molybdate, 6% of spodumene and 9% of potash feldspar, and the heat-resistant porcelain product is obtained through the working procedures of burdening, ball milling, addition of a pre-firing material 13%, uniform mixing, sieving, press-filtering and mud pressing, pugging, ageing, molding, drying, glazing, secondary drying and firing.
The pre-sintering material comprises the following materials in percentage by mass: 34% of magnesium phosphate, 22% of alumina, 24% of quartz and 20% of albite.
The particle fineness of the pre-sintered material is that the pre-sintered material is sieved by a 500-mesh sieve, and the residue on the sieve is less than 0.5%; the firing temperature of the pre-firing material is 1200 ℃.
The firing system of the pre-firing material is as follows: the temperature is raised from the normal temperature to 1200 ℃ at the speed of 1.5 ℃/min.
The parameters of the sieving process are as follows: sieving with 300 mesh sieve to obtain residue less than 0.5%.
The forming process adopts press forming.
The time of the staling process is 5 days.
The firing system of the firing procedure is as follows: heating from normal temperature to 900 deg.C at a rate of 3 deg.C/min, heating to 1230 deg.C at a rate of 1 deg.C/min, maintaining for 20min, heating to 1300 deg.C at a rate of 2 deg.C/min, and maintaining for 30 min.
The glaze used in the glazing procedure comprises the following materials in percentage by mass: 34% of lithium porcelain stone, 30% of spodumene, 12% of kaolin, 5% of quartz, 7% of potassium feldspar, 7% of barium sulfate and 5% of zinc oxide nanofiber.
The thermal expansion coefficient of the heat-resistant porcelain product is 0.7 multiplied by 10-6The crack is avoided by heat exchange at 800-20 ℃ for three times, and the breaking strength is 190 MPa.
Example 4
A heat-resistant porcelain with high thermal shock resistance is characterized in that: the method adopts natural mineral raw materials and industrial chemical raw materials, and comprises the following components in percentage by weight: the heat-resistant porcelain product is prepared by the working procedures of proportioning, ball milling, adding 15% of pre-firing material, uniformly mixing, sieving, press-filtering, mud pressing, pugging, ageing, molding, drying, glazing, secondary drying and firing, wherein the working procedures comprise 26% of lithium porcelain stone, 26% of kaolin, 14% of magnesium carbonate, 15% of bauxite, 4% of ammonium molybdate, 8% of spodumene and 7% of potassium feldspar.
The pre-sintering material comprises the following materials in percentage by mass: 28% of magnesium phosphate, 29% of alumina, 25% of quartz and 18% of albite.
The particle fineness of the pre-sintered material is that the pre-sintered material is sieved by a 500-mesh sieve, and the residue on the sieve is less than 0.5%; the firing temperature of the pre-firing material is 1200 ℃.
The firing system of the pre-firing material is as follows: the temperature is raised from the normal temperature to 1200 ℃ at the speed of 1.5 ℃/min.
The parameters of the sieving process are as follows: sieving with 300 mesh sieve to obtain residue less than 0.5%.
The forming process adopts press forming.
The time of the staling process is 5 days.
The firing system of the firing procedure is as follows: heating from normal temperature to 900 deg.C at a rate of 3 deg.C/min, heating to 1230 deg.C at a rate of 1 deg.C/min, maintaining for 20min, heating to 1340 deg.C at a rate of 2 deg.C/min, and maintaining for 30 min.
The glaze used in the glazing procedure comprises the following materials in percentage by mass: 32% of lithium porcelain stone, 40% of spodumene, 10% of kaolin, 2% of quartz, 5% of potassium feldspar, 5% of barium sulfate and 6% of zinc oxide nano fiber.
The thermal expansion coefficient of the heat-resistant porcelain product is 0.9 multiplied by 10-6The crack is avoided after three heat exchanges at 800-20 ℃, and the breaking strength is 198 MPa.

Claims (8)

1. A heat-resistant porcelain with high thermal shock resistance is characterized in that: the method adopts natural mineral raw materials and industrial chemical raw materials, and comprises the following components in percentage by weight: 25-30% of lithium porcelain stone, 20-30% of kaolin, 10-15% of magnesium carbonate, 15-20% of bauxite, 2-5% of ammonium molybdate, 5-10% of spodumene and 5-10% of potassium feldspar, and performing the working procedures of batching, ball milling, adding 10-15% of pre-firing material, uniformly mixing, sieving, press-filtering, mud pressing, mud refining, ageing, molding, drying, glazing, secondary drying and firing to obtain a heat-resistant porcelain product;
the pre-sintering material comprises the following materials in percentage by mass: 25-35% of magnesium phosphate, 20-30% of alumina, 20-25% of quartz and 15-20% of albite;
the glaze used in the glazing procedure comprises the following materials in percentage by mass: 15-40% of spodumene, 20-40% of spodumene, 10-15% of kaolin, 2-10% of quartz, 5-10% of potash feldspar, 5-10% of barium sulfate and 3-6% of zinc oxide nanofiber.
2. The heat-resistant porcelain according to claim 1, wherein: the particle fineness of the pre-sintered material is that the pre-sintered material is sieved by a 500-mesh sieve, and the residue on the sieve is less than 0.5%; the firing temperature of the pre-firing material is 1200 ℃.
3. The heat-resistant porcelain according to claim 2, wherein: the firing system of the pre-firing material is as follows: the temperature is raised from the normal temperature to 1200 ℃ at the speed of 1.5 ℃/min.
4. The heat-resistant porcelain according to claim 1, wherein: the parameters of the sieving process are as follows: sieving with 300 mesh sieve to obtain residue less than 0.5%.
5. The heat-resistant porcelain according to claim 1, wherein: the forming process adopts press forming.
6. The heat-resistant porcelain according to claim 1, wherein: the time of the staling process is 5 days.
7. The heat-resistant porcelain according to claim 1, wherein: the firing system of the firing procedure is as follows: heating from normal temperature to 900 ℃ at the speed of 3 ℃/min, then heating to 1230 ℃ at the speed of 1 ℃/min, preserving heat for 20min, then heating to 1280-1340 ℃ at the speed of 2 ℃/min, and preserving heat for 30 min.
8. The heat-resistant porcelain according to claim 1, wherein: the thermal expansion coefficient of the heat-resistant porcelain product is 0.5-1 multiplied by 10-6The crack is not generated when the heat exchange is carried out for three times at 800-20 ℃, and the breaking strength is 180-200 Mpa.
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