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Method for preparing machinable microcrystal glass material with high bioactivity

A bioactive, glass-ceramic technology, applied in the field of bioactive materials, can solve the problems of high raw material requirements, high price, and high sintering temperature, and achieve the effects of improving biological activity, shortening sintering time, and reducing sintering temperature

Active Publication Date: 2012-05-02
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the three methods have their shortcomings. The melting method and sintering method have high sintering temperature and low activity; the sol-gel method has complicated procedures, high raw material requirements, and expensive prices.

Method used

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  • Method for preparing machinable microcrystal glass material with high bioactivity

Examples

Experimental program
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Effect test

Embodiment 1

[0029] (1) Preparation of hydroxyapatite powder: Dissolve 125mL ethanol in 375mL deionized water to prepare an ethanol solution with a mass fraction of 25%, dissolve 6.84g ammonium dihydrogen phosphate in the ethanol solution, add ammonia water to adjust the pH value 10-11, prepare an ethanol solution of ammonium dihydrogen phosphate with a molar concentration of 0.12mol / L; dissolve 16.27g of calcium nitrate in 20mL of deionized water to prepare a calcium nitrate solution with a molar concentration of 3.5mol / L; The ammonium hydrogen ethanol solution was stirred at a high speed at 270rpm, while calcium nitrate solution was added to it, and a pH regulator was added to adjust the pH value to 7; high-speed centrifugation at 4000rpm for 10min, the obtained lower layer precipitate was washed with ethanol and then freeze-dried at -10°C 30h to obtain powder; calcining the above powder at 700°C for 3h, cooling, grinding, and passing through a 200-mesh sieve to obtain hydroxyapatite powd...

Embodiment 2

[0035] (1) Preparation of hydroxyapatite powder: Dissolve 125mL ethanol in 375mL deionized water to prepare an ethanol solution with a mass fraction of 25%, dissolve 6.84g ammonium dihydrogen phosphate in the ethanol solution, add ammonia water to adjust the pH value 10-11, prepare an ethanol solution of ammonium dihydrogen phosphate with a molar concentration of 0.12mol / L; dissolve 16.27g of calcium nitrate in 20mL of deionized water to prepare a calcium nitrate solution with a molar concentration of 3.5mol / L; The ammonium hydrogen ethanol solution was stirred at a high speed at 400rpm, while calcium nitrate solution was added to it, and the pH value regulator was added to adjust the pH value to 7; it was centrifuged at a high speed of 5000rpm for 5min, and the obtained lower precipitate was washed with ethanol and then freeze-dried at -5°C 40h to obtain powder; calcining the above powder at 750°C for 2.5h, cooling, grinding, and passing through a 200-mesh sieve to obtain hydr...

Embodiment 3

[0041] (1) Preparation of hydroxyapatite powder: Dissolve 125mL ethanol in 375mL deionized water to prepare an ethanol solution with a mass fraction of 25%, dissolve 6.84g ammonium dihydrogen phosphate in the ethanol solution, add ammonia water to adjust the pH value 10-11, prepare an ethanol solution of ammonium dihydrogen phosphate with a molar concentration of 0.12mol / L; dissolve 16.27g of calcium nitrate in 20mL of deionized water to prepare a calcium nitrate solution with a molar concentration of 3.5mol / L; The ammonium hydrogen ethanol solution was stirred at a high speed at 350rpm, while calcium nitrate solution was added to it, and the pH value regulator was added to adjust the pH value to 7; it was centrifuged at a high speed of 4500rpm for 8min, and the obtained lower precipitate was washed with ethanol and then freeze-dried at -8°C 35h to obtain powder; calcining the above powder at 800°C for 2h, cooling, grinding, and passing through a 200-mesh sieve to obtain hydrox...

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Abstract

The invention discloses a method for preparing a machinable microcrystal glass material with high bioactivity, which comprises the steps of: preparing hydroxyapatite powder by using ammonium dihydrogen phosphate and calcium nitrate as raw materials; preparing fluorophlogopite powder by the melting-water quenching method; preparing 45S5 bioactive glass powder by the sol-gel method; uniformly mixing the three precursor powders and adding the polyvinyl alcohol used as a binding agent, compression moulding and then crystallizing and sintering to obtain the machinable microcrystal glass material with high bioactivity. The microcrystal glass prepared by the invention has good bioactivity, machinability and mechanical properties and performances can be realized by adjusting the ratio of the three precursor powders and are easy to control. With adoption of co-firing at low temperature, the invention greatly reduces the sintering temperature, shortens the sintering time and lowers the cost while ensuring that components are uniformly distributed at the same time.

Description

technical field [0001] The invention belongs to the field of bioactive materials, and relates to a method for preparing glass-ceramic, in particular to a method for preparing a highly bioactive machinable glass-ceramic material. Background technique [0002] Machinable glass-ceramics, also known as machinable glass-ceramics, is a new type of glass-ceramics. In addition to the excellent properties shared by ordinary glass-ceramics, it also has machinability properties similar to metal materials. To a certain extent, metal processing tools can be used for cutting processing. For example, ordinary machine tools can be used for precision dimension processing such as turning, milling, planing, grinding, sawing, drilling or tapping, so as to manufacture precision dimension parts and complex shape components. This is What other glass or glass-ceramic materials do not have, has broad engineering application prospects. By adding the apatite phase to the machinable glass-ceramics to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/16C03C10/02C03B32/02
Inventor 陈晓峰张海希李玉莉苗国厚罗小刚韩雪
Owner SOUTH CHINA UNIV OF TECH
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