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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 simple equipment

Inactive Publication Date: 2007-02-14
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] According to the ratio of oxide molar ratio to SiO 2 :CaO:P 2 o 5 : The amount of MgO=5:3:1:1 measures ethyl silicate, calcium nitrate, ethyl phosphate and magnesium nitrate, and mixes them with dehydrated alcohol whose molar ratio is 10 times respectively to obtain ethyl phosphate, Ethanol and ethyl silicate / ethanol, calcium nitrate / ethanol and magnesium nitrate / ethanol solutions. Add the deionized water whose mole number is 1 times the mole number of ethyl silicate to the ethyl silicate / ethanol solution, and make it pre-hydrolyze for 0.5 hour. According to the sequence of ethyl phosphate / ethanol, calcium nitrate / ethanol and magnesium nitrate / ethanol solutions, they were added dropwise to the ethyl silicate prehydrolyzate. After each solution was added dropwise, another solution was 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 1 times the mole...

Embodiment 2

[0022] According to the ratio of oxide molar ratio to SiO 2 :CaO:P 2 o 5 : MgO=1: 7: 1: 1 measure ethyl silicate, calcium nitrate, ethyl phosphate and magnesium nitrate, mix with dehydrated alcohol that its molar ratio is 9 times respectively, make ethyl phosphate / Ethanol and ethyl silicate / ethanol, calcium nitrate / ethanol and magnesium nitrate / ethanol solutions. Deionized water with a mole number 0.5 times that of ethyl silicate was added dropwise to the ethyl silicate / ethanol solution for prehydrolysis for 1 hour. According to the sequence of ethyl phosphate, calcium nitrate / ethanol and magnesium nitrate / ethanol solutions, they were added dropwise to the ethyl silicate prehydrolyzate. After each solution is added dropwise, another solution is added after 0.5 hours of reaction to ensure that the reaction is fully carried out. Half an hour after all the solutions were added dropwise, deionized water with a mole number 0.5 times the mole number of ethyl silicate was added,...

Embodiment 3

[0024] According to the ratio of oxide molar ratio to SiO 2 :CaO:P 2 o 5 : The amount of MgO=7:1:1:1 measures ethyl silicate, calcium nitrate, ethyl phosphate and magnesium nitrate, and mixes them with dehydrated alcohol whose molar ratio is 8 times respectively, makes ethyl phosphate / Ethanol and ethyl silicate / ethanol, calcium nitrate / ethanol and magnesium nitrate / ethanol solutions. Deionized water with a mole number 0.5 times that of ethyl silicate was added dropwise to the ethyl silicate / ethanol solution for prehydrolysis for 1 hour. According to the sequence of ethyl phosphate / ethanol, calcium nitrate / ethanol and magnesium nitrate / ethanol solutions, they were added dropwise to the ethyl silicate prehydrolyzate. After each solution is added dropwise, another solution is added after 0.5 hours of reaction to ensure that the reaction is fully carried out. Half an hour after all the solutions were added dropwise, deionized water with a mole number 0.5 times the mole number...

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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 ultrafine biological glass powder relates to a method for preparing biological glass and glass powder of ceramic materials. Background technique [0002] At present, the preparation method of bioglass and its ceramic material powder is mainly high-temperature melting method. This method requires complex equipment, inconvenient operation, volatile raw materials, large loss of components, and difficult elimination of devitrification and component segregation. Crucible pollution, these characteristics will have a certain negative impact on the comprehensive performance of bioglass materials. The sol-gel method solves some problems caused by the high-temperature melting method, such as component segregation and crucible pollution, and, because it reacts in a solution, the reaction raw materials can be uniformly mixed at the atomic and molecular levels. In addition, the prepared gel powder has high purity and large spe...

Claims

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Application Information

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