Preparation method of bismuth silicate micro crystal

A bismuth silicate and microcrystal technology, applied in chemical instruments and methods, bismuth compounds, inorganic chemistry, etc., can solve the problem that it is difficult to obtain high-purity bismuth silicate nanopowder, and it is not suitable for batch production of bismuth silicate nanopowder , Low production efficiency and other issues, achieve the effect of low raw material price, less impurity phase, and reduce the formation of impurity phase

Inactive Publication Date: 2010-05-19
SHAANXI UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

However, the mechanical alloying method takes a long time and the production efficiency is low, so it is not suitable as a practical method for mass production of bismuth silicate nanopowders.
Moreover, it is difficult to obtain high-purity bismuth silicate nanopowders due to the inevitable introduction of impurities from the grinding system (including grinding containers and grinding balls) during the long-term high-energy ball milling process.
This is very unfavorable for the application of bismuth silicate in the fields of optoelectronics and photocatalysis

Method used

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  • Preparation method of bismuth silicate micro crystal
  • Preparation method of bismuth silicate micro crystal

Examples

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Effect test

Embodiment 1

[0021] The first step: preparation of bismuth silicate glass

[0022] Firstly, after cleaning and drying the quartz glass with a purity of 4-6N, put it into a ball mill jar and grind it to 300 mesh to make quartz glass powder; then, according to the molar ratio Bi 2 o 3 : SiO 2 = 1: 1 mix bismuth trioxide powder (content is 99.99%) and quartz glass powder and put into the agate emulsion ball mill jar and ball mill for 30min to obtain the batching material; secondly, add the batching material into the muffle furnace in advance In the high-purity alumina crucible with a cover, the temperature of the first feeding is 950°C, and the rest of the batch is added after holding the heat for 30 minutes, and the temperature is raised to 1080°C at 20°C / min. Stir the molten glass with a stainless steel rod for 1 minute every 1 hour; after the heat preservation is over, pour the molten glass into the middle of the rotating iron roller cooled by water, and make the molten glass into a glas...

Embodiment 2

[0028] The first step: preparation of bismuth silicate glass

[0029] Firstly, after cleaning and drying the quartz glass with a purity of 4-6N, put it into a ball mill jar and grind it to 300 mesh to make quartz glass powder; then, according to the molar ratio Bi 2 o 3 : SiO 2 = 1: 1 mix bismuth trioxide powder (content is 99.99%) and quartz glass powder and put into the agate emulsion ball mill jar and ball mill for 50min to obtain the batching material; secondly, add the batching material into the muffle furnace in advance In the high-purity alumina crucible with a cover, the temperature of the first feeding is 960°C, and the rest of the batch is added after keeping it for 25 minutes, and the temperature is raised to 1090°C at 22°C / min. Stir the molten glass for 1 minute, then pour the molten glass into the middle of the iron roller that is rotating on the ground and use water to cool it, and make the molten glass into a glass sheet with a thickness of 1-5mm during the co...

Embodiment 3

[0034] The first step: preparation of bismuth silicate glass

[0035] Firstly, after cleaning and drying the quartz glass with a purity of 4-6N, put it into a ball mill jar and grind it to 300 mesh to make quartz glass powder; then, according to the molar ratio Bi 2 o 3 : SiO 2 = 1: 1 mix bismuth trioxide powder (content is 99.99%) and quartz glass powder and put into agate emulsion ball mill jar and ball mill for 60min to obtain batching material; secondly, add batching material into the muffle furnace in advance In the high-purity alumina crucible with a cover, the temperature of the first feeding is 970°C, and the rest of the batch is added after holding the heat for 20 minutes, and the temperature is raised to 1100°C at 30°C / min. Stir the molten glass with a stainless steel rod for 1 minute every 1 hour; after the heat preservation is over, pour the molten glass into the middle of the rotating iron roller cooled by water, and make the molten glass into a glass with a thi...

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Abstract

The invention relates to a preparation method of a bismuth silicate micro crystal, which comprises the following steps: mixing bismuth trioxide powder and quartz glass powder to obtain a mixture; adding the mixture into a high-purity alumina crucible which has a cover and is put into a muffle furnace in advance for melting, then pouring the molten glass metal into the middle part of a rotary water-cooled iron roller, and manufacturing the glass metal into a glass sheet in the cooling process; putting the glass sheet into the muffle furnace for heating and cooling to obtain the bismuth silicate glass; and putting the alumina crucible containing bismuth silicate glass into the muffle furnace for heating and insulating, and then, quickly taking out the alumina crucible and cooling to obtain the bismuth silicate micro crystal. In the invention, the amorphous quartz glass powder is used for preparing the bismuth silicate crystal; and the prepared bismuth silicate micro crystal has high purity, very few impurities, low cost of raw materials, rich sources, lower synthesis temperature and simple preparation processes, is beneficial to industrial production, and can be used as a high-quality raw material and a high-performance catalytic material for preparing the high-quality transparent bismuth silicate single crystal.

Description

technical field [0001] The present invention relates to a kind of preparation method of silicate crystal containing bismuth, particularly a kind of bismuth silicate (Bi 2 SiO 5 ) Microcrystal preparation method. Background technique [0002] Searching for new functional crystals is the frontier of international crystal materials science, and the research on new functional crystals prediction, raw material preparation, crystallization behavior, crystal growth and other aspects is the basis of new functional crystal research. In recent years it has been discovered that Bi 2 o 3 -SiO 2 The system is a system with great value for further research. Since elements Si and Ge belong to the same main group in the periodic table of chemical elements and have similar properties, Bi 2 o 3 -SiO 2 System and Bi 2 o 3 -GeO 2 The systems have many similarities in structure and performance. Currently against Bi 2 o 3 -GeO 2 Systematic research has been relatively mature, and f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G29/00
Inventor 郭宏伟王秀峰杨新平郭晓琛高档妮田鹏龚煜轩
Owner SHAANXI UNIV OF SCI & TECH
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