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Preparation method of bismuth-containing eulytite bismuth silicate crystals

A technology of sphalerite and bismuth silicate, which is applied in the field of silicate crystal preparation, can solve the problem that it is difficult to obtain high-purity bismuth silicate nanopowder, which is not suitable for mass production of bismuth silicate nanopowder, and the disadvantage of bismuth silicate and other problems, to achieve the effect of low price, less impurity phase, and reduce the generation of impurity phase

Inactive Publication Date: 2010-05-19
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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-containing eulytite bismuth silicate crystals
  • Preparation method of bismuth-containing eulytite bismuth silicate crystals

Examples

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Effect test

Embodiment 1

[0016] Example 1, first, after cleaning and drying the quartz glass, 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 30min to obtain batch; batch batch is put into high-purity alumina crucible, and then Put the crucible with the batch material into the muffle furnace, and fire it according to the following process: from room temperature to 550°C at a heating rate of 5°C / min and keep it warm for 30 minutes; then at a heating rate of 10°C / min. 550 ° C to 900 ° C and keep it warm for 6 hours; then quickly take out the crucible from the muffle furnace and put it into flowing water, let the sample cool to room temperature at 400 ° C / min, take out the water-quenched sample after cooling, and finally , the sample was dried and ball-milled to obtain bismuth-cont...

Embodiment 2

[0018] Example 2, first, after cleaning and drying the quartz glass, 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 mixes bismuth trioxide powder (content is 99.99%) and quartz glass powder and puts into agate emulsion ball mill jar and ball mills for 30min to obtain batch; Put the crucible with batch materials into the muffle furnace, and fire it according to the following process system: raise the temperature from room temperature to 550°C at a heating rate of 5°C / min and keep it for 30 minutes; then heat it at a heating rate of 10°C / min Rise from 550°C to 920°C and keep it warm for 12 hours; then quickly take out the crucible from the muffle furnace and put it into flowing water, cool the sample to room temperature at 400°C / min, take out the water-quenched sample after cooling, Finally, the sample was dried and ball-milled to obtain bismuth-containing bismuth bismuth silicate (Bi ...

Embodiment 3

[0020] Example 3, first, after cleaning and drying the quartz glass, put it into a ball mill jar and mill it to 300 mesh to make quartz glass powder; then according to the molar ratio Bi 2 o 3 : SiO 2 = 1: 1 mixes bismuth trioxide powder (content is 99.99%) and quartz glass powder and puts into agate emulsion ball mill jar and ball mills for 40min to obtain batch; Put the crucible with the batch material into the muffle furnace, and fire it according to the following process system: raise the temperature from room temperature to 550°C at a heating rate of 5°C / min and keep it for 30 minutes; then heat it at a heating rate of 12°C / min Rise from 550°C to 890°C and keep it warm for 16 hours; then quickly take out the crucible from the muffle furnace and put it into flowing water, cool the sample to room temperature at 400°C / min, take out the water-quenched sample after cooling, Finally, the sample was dried and ball-milled to obtain bismuth-containing bismuth bismuth silicate (B...

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Abstract

The invention relates to a preparation method of bismuth-containing eulytite bismuth silicate crystals, which comprises the following steps: mixing bismuth trioxide powder and quartz glass powder into a batch mixture; putting the batch mixture into a high purity alumina crucible; and firing according to the following technical system: ascending from room temperature to 550 DEG C at a heating rate of 5 DEG C / minute and insulating for 30 minutes; ascending the temperature from 550 DEG C to 880-920 DEG C at the heating rate of 10-12 DEG C / minute and insulating for 6-24 hours; then rapidly taking the crucible out of a muffle furnace and putting the crucible in running water, so that the sample is cooled to room temperature at a cooling rate of 400 DEG C / minute; after cooling, taking out the water-quenched sample; and finally, drying and ball milling the sample to obtain the bismuth-containing eulytite bismuth silicate crystal powder. In the invention, high purity amorphous quartz glass is used as a raw material, thereby avoiding reacting with bismuth trioxide at low temperature. The prepared bismuth silicate crystals feature high purity, very few impurities, low cost and rich sources of raw materials, and simple preparation processes.

Description

technical field [0001] The invention relates to a preparation method of bismuth-containing silicate crystals, in particular to a bismuth-containing sphalerite Bi 4 SiO 12 Preparation method of bismuth silicate crystal. 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/34
Inventor 郭宏伟王秀峰杨新平郭晓琛高档妮田鹏
Owner SHAANXI UNIV OF SCI & TECH
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