A kind of low-temperature low-alkali metal lead-free glaze and its preparation process

An alkali metal, low temperature technology, applied in the field of low temperature and low alkali metal lead-free glaze and its preparation process, can solve the problems of harmful health of users and easy precipitation of lead, and achieves improved fluidity, improved acid corrosion resistance, and reduced thermal expansion. The effect of coefficients

Active Publication Date: 2022-04-12
潮州市广嘉陶瓷制作有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, lead glaze products are easy to precipitate lead during people's daily use, which is harmful to the health of users.

Method used

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  • A kind of low-temperature low-alkali metal lead-free glaze and its preparation process
  • A kind of low-temperature low-alkali metal lead-free glaze and its preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Weigh ZnO 55%, B 2 o 3 18%, SiO 2 17%, Al 2 o 3 6%, BaO 4%, mixed evenly, put it in a muffle furnace to raise the temperature to 1230°C at 5°C / min, keep it warm for 30 minutes, then pour the molten glass into cold water to quench to obtain a glass frit. Then, the dried glass frit was ball milled at a speed of 80 rpm for 40 hours using a ball mill. Then the ball-milled slurry was filtered into a beaker with a filter screen, and dried at 100°C. Finally, pass the dried glass powder through a 300-mesh sieve to obtain low-temperature lead-free glass powder. Then weigh 24 parts of potassium feldspar, 9 parts of quartz, 45 parts of low-temperature lead-free glass powder, 10 parts of talc and 12 parts of limestone according to the formula percentage of low-temperature low-alkali metal lead-free glaze. Use alumina balls as grinding balls, use absolute ethanol as solvent, material: ball: solvent = 1:4:2, and large ball: medium ball: small ball = 1:1:1, then put the ball m...

Embodiment 2

[0022] Weigh ZnO 30%, B 2 o 3 22%, SiO 2 30%, Al 2 o 3 10%, BaO 5%, TiO 2 3%, mixed evenly, placed in a muffle furnace to raise the temperature to 1230°C at 5°C / min, keep the temperature for 30 minutes, then pour the molten glass into cold water to quench to obtain a glass frit. Then, the dried glass frit was ball milled at a speed of 80 rpm for 40 hours using a ball mill. Then the ball-milled slurry was filtered into a beaker with a filter screen, and dried at 100°C. Finally, pass the dried glass powder through a 300-mesh sieve to obtain low-temperature lead-free glass powder. Then weigh 20 parts of potassium feldspar, 7 parts of quartz, 54 parts of low-temperature lead-free glass powder, 9 parts of talc, and 10 parts of limestone according to the percentage of the low-temperature lead-free glaze formula. Use alumina balls as grinding balls, use absolute ethanol as solvent, material: ball: solvent = 1:4:2, and large ball: medium ball: small ball = 1:1:1, then put th...

Embodiment 3

[0025] Weigh ZnO 47%, B 2 o 3 20%, SiO 2 22%, Al 2 o 3 5%, BaO 6%, mixed evenly, placed in a muffle furnace to raise the temperature to 1230°C at 5°C / min, keep it warm for 30 minutes, then pour the molten glass into cold water to quench to obtain a glass frit. Then, the dried glass frit was ball milled at a speed of 80 rpm for 40 hours using a ball mill. Then the ball-milled slurry was filtered into a beaker with a filter screen, and dried at 100°C. Finally, pass the dried glass powder through a 300-mesh sieve to obtain low-temperature lead-free glass powder. Then weigh 22 parts of potassium feldspar, 7 parts of quartz, 52 parts of low-temperature lead-free glass powder, 9 parts of talc and 10 parts of limestone according to the formula percentage of low-temperature low-alkali metal lead-free glaze. Use alumina balls as grinding balls, use absolute ethanol as solvent, material: ball: solvent = 1:4:2, and large ball: medium ball: small ball = 1:1:1, then put the ball mi...

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Abstract

The invention relates to a low-temperature low-alkali metal lead-free glaze and a preparation process thereof, mainly comprising the following components and parts by weight: 20-24 parts of potassium feldspar, 7-9 parts of quartz, and 45-54 parts of low-temperature lead-free glass powder , 9‑10 parts of talc, 10‑12 parts of limestone; the low-temperature lead-free glass powder is ZnO–B 2 o 3 – SiO 2 Glass, including ZnO 30-55%, B 2 o 3 18-22%, SiO 2 17~30%, Al 2 o 3 5~10%, BaO 4~6%, TiO 2 0~3%. The present invention adds ZnO-B in the glaze 2 o 3 – SiO 2 Glass is used to replace lead-containing flux and alkali metal oxides. When the content of alkali metals is less than 3%, the acid corrosion resistance of the glaze is greatly improved, and the strength and wear resistance of the glaze are better. It can ensure that the sintering temperature is below 800°C, and it can also reduce the thermal expansion coefficient of the glaze, and at the same time, it will not precipitate heavy metals such as lead and cadmium, which meets the requirements of health and environmental protection. In addition, the invention also effectively reduces the viscosity of the glaze by adding talc and limestone, and improves the fluidity and gloss of the glaze.

Description

technical field [0001] The invention belongs to the technical field of inorganic non-metallic materials, and in particular relates to a low-temperature low-alkali metal lead-free glaze and a preparation process thereof. Background technique [0002] Lead is a heavy metal element, which is toxic and extremely harmful to the human body. Therefore, the existence of lead in daily life has attracted more and more people's general attention. When the lead content in the human body reaches a certain level (that is, 6 parts per million), lead will affect the functions of human hematopoiesis, nerves, blood vessels, kidneys and other organs, thereby poisoning the human body. In severe cases, it can even endanger people's lives. Especially when lead-glazed products are in contact with acidic food, lead will be dissolved out and mixed into the food, causing human poisoning. [0003] In the production of ceramics, the glaze with lead as the main component has excellent properties such...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C8/20C03C8/04
Inventor 邱伟彬郑华强张伟蓝彩凤王双喜
Owner 潮州市广嘉陶瓷制作有限公司
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