Method for synthesizing high pure superfine biological glass powder

A bio-glass, high-purity technology, applied in glass molding, glass manufacturing equipment, manufacturing tools, etc., can solve the problems of easy introduction of impurities, environmental pollution, uneven system composition, etc., to achieve hard agglomeration, less introduction of impurities, The effect of easy operation

Inactive Publication Date: 2005-03-02
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, the use of sol-gel method to prepare biogel glass powder has disadvantages such as long milling cycle, easy introduction of impurities, and hard agglomeration of the powder.
Especially in the multi-component system using the sol-gel method to prepare powder, it is easy to appear that the solute with a fast hydrolysis rate is preferentially hydrolyzed to form precipitation due to the different hydrolysis and polycondensation rates of each solute, resulting in uneven composition of the entire system. After gelling, it will be aged and dried for as long as 100 hours. During this process, a large number of substances including ethanol, acid, alkoxide or ester will volatilize and cause environmental pollution, and some metal salts will also appear to be preferentially processed. Saturated precipitation, affecting the final uniformity of the powder

Method used

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  • Method for synthesizing high pure superfine biological glass powder

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Effect test

Embodiment 1

[0020] According to the molar ratio of oxide to SiO 2 :CaO:P 2 O 5 :MgO=5:3:1:1 Measure ethyl silicate, calcium nitrate, ethyl phosphate and magnesium nitrate, and mix them with 10 times the molar ratio of absolute ethanol to obtain ethyl phosphate, Ethanol and ethyl silicate / ethanol, calcium nitrate / ethanol and magnesium nitrate / ethanol solutions. Deionized water with a mole number of 1 times the mole number of ethyl silicate was added dropwise to the ethyl silicate / ethanol solution, and pre-hydrolyzed for 0.5 hours. In the order of ethyl phosphate / ethanol, calcium nitrate / ethanol and magnesium nitrate / ethanol solution, they were added dropwise to the ethyl silicate pre-hydrolyzed solution. After each solution is added dropwise, another solution is added after 1 hour of reaction to ensure the full progress of the reaction. Half an hour after all the solutions were added dropwise, deionized water with a mole number of 1 times the mole number of ethyl silicate was added, and then a...

Embodiment 2

[0022] According to the molar ratio of oxide to SiO 2 :CaO:P 2 O 5 :MgO=1:7:1:1 Measure ethyl silicate, calcium nitrate, ethyl phosphate and magnesium nitrate, and mix them with 9 times the molar ratio of absolute ethanol to obtain ethyl phosphate / Ethanol and ethyl silicate / ethanol, calcium nitrate / ethanol and magnesium nitrate / ethanol solutions. Deionized water with a mole number of 0.5 times the mole number of ethyl silicate was added dropwise to the ethyl silicate / ethanol solution, and it was pre-hydrolyzed for 1 hour. In the order of ethyl phosphate, calcium nitrate / ethanol and magnesium nitrate / ethanol solution, they were added dropwise to the ethyl silicate pre-hydrolyzed solution. After each solution is added dropwise, another solution is added after 0.5 hours of reaction to ensure the full progress of the reaction. Half an hour after all the solutions were added dropwise, deionized water with a mole number of 0.5 times the mole number of ethyl silicate was added, and then...

Embodiment 3

[0024] According to the molar ratio of oxide to SiO 2 :CaO:P 2 O 5 :MgO=7:1:1:1 Measure ethyl silicate, calcium nitrate, ethyl phosphate and magnesium nitrate, and mix them with 8 times the molar ratio of absolute ethanol to obtain ethyl phosphate / Ethanol and ethyl silicate / ethanol, calcium nitrate / ethanol and magnesium nitrate / ethanol solutions. Deionized water with a mole number of 0.5 times the mole number of ethyl silicate was added dropwise to the ethyl silicate / ethanol solution, and it was pre-hydrolyzed for 1 hour. In the order of ethyl phosphate / ethanol, calcium nitrate / ethanol and magnesium nitrate / ethanol solution, they were added dropwise to the ethyl silicate pre-hydrolyzed solution. After each solution is added dropwise, another solution is added after 0.5 hours of reaction to ensure the full progress of the reaction. After adding all the solutions for half an hour, add deionized water whose mole number is 0.5 times the mole number of ethyl silicate, and then add cat...

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Abstract

The present invention relates to method of synthesizing high purity superfine biological glass powder, and features that after hydrolyzing ethyl silicate for 0.5-1 hr, ethyl phosphate, ethanol solution of calcium nitrate and ethanol solution of magnesium nitrate are dropped successively into the hydrolyzed ethyl silicate liquid and deionized water and nitric acid are then added to regulate pH value to 0.5-2; the mixed liquid is aged and mixed with urea in the same volume, and the mixture is ignited to burn to obtain glass powder precursor; and the precursor is heated to obtain superfine biological glass powder. The simple process can eliminate devitrification, component segregation and crucible pollution, and has short production period, less introduced impurity and less hard powder aggregation.

Description

Technical field [0001] A method for synthesizing high-purity ultra-fine biological glass powder relates to a method for preparing glass powder for biological glass and ceramic materials. Background technique [0002] At present, the preparation method of bioglass and ceramic material powder is mainly the high-temperature melting method. This method requires complicated equipment, inconvenient operation, volatile raw materials, large component loss, devitrification and component segregation, and it is easy to occur. Crucible pollution, these characteristics will have a certain negative impact on the comprehensive performance of bioglass materials. The sol-gel method solves some of the problems caused by the high-temperature melting method, such as component segregation and crucible contamination, and because it is reacted in a solution, the reaction raw materials can be uniformly mixed at the atomic and molecular level. In addition, the prepared gel powder has high purity and larg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B19/06C03C3/097C03C12/00C04B35/14C04B35/622C04B35/64
Inventor 蔡玉荣周廉于振涛牛金龙
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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