Lithium, aluminum and silicon series microcrystalline glass for dentistry and preparation method thereof

A glass-ceramic, lithium aluminum silicon technology, applied in dental preparations, dentistry, dental prostheses, etc., can solve the problems of inability to improve strength and toughness at the same time, complex preparation process, unimproved toughness, etc., to achieve high-strength performance, preparation Simple process conditions and the effect of reducing production costs

Active Publication Date: 2017-12-29
XI AN JIAOTONG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

However, the prepared lithium-aluminum-silicon-based glass ceramics mainly improved the strength, but did not improve the toughness.
[0004] At present, the difficulties faced by lithium-aluminum-silicon g...

Method used

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  • Lithium, aluminum and silicon series microcrystalline glass for dentistry and preparation method thereof
  • Lithium, aluminum and silicon series microcrystalline glass for dentistry and preparation method thereof
  • Lithium, aluminum and silicon series microcrystalline glass for dentistry and preparation method thereof

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Embodiment Construction

[0026] The content of the present invention will be further described below in conjunction with the accompanying drawings and embodiments, but the protection scope of the present invention should not be limited thereby.

[0027] The invention provides a method for preparing lithium-aluminum-silicon glass-ceramics, comprising the following steps:

[0028] 1) Obtaining mullite whiskers: mix deionized water, ethyl orthosilicate and absolute ethanol according to a certain ratio, wherein the concentration of deionized water is 0.3-0.6mol / L, and the concentration of ethyl orthosilicate Concentration is 0.4-0.8mol / L, stirs 48 hours, obtains silica sol; AlF 3 , Nano Al 2 o 3 (30nm), ammonia water (concentration is 20wt%) and ethanol are mixed according to a certain ratio, wherein nanometer Al 2 o 3 The concentration is 0.4-1mol / L, AlF 3 The concentration is 0.2-0.4mol / L, ammonia water (NH 3 ·H 2O) the concentration is 0.5-3.5mol / L, fully stirred for 24 hours to obtain a mixed a...

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Abstract

The invention discloses lithium, aluminum and silicon series microcrystalline glass for dentistry and a preparation method thereof. The preparation method includes: using Li2CO3, SiO2, K2CO3 and La2O3 as raw materials, and adopting a method of melt cooling combined with water quenching to prepare lithium-silicon binary glass powder; using A12O3, AlF3 and tetraethyl orthosilicate as raw materials, and adopting a sol gel-sintering method to prepare mullite crystal whisker with high dispersity; subjecting the glass powder and the mullite crystal whisker to mixing and hot-pressing sintering, wherein in the process of sintering, the mullite crystal whisker is in in-situ reaction with the glass powder to be converted into beta-spodumene crystal whisker; finally to obtain the lithium, aluminum and silicon series microcrystalline glass taking the beta-spodumene crystal whisker, lithium disilicate and lithium metasilicate as main crystal phase. The lithium, aluminum and silicon series microcrystalline glass has the advantages of high strength, high toughness, low thermal expansion coefficient and translucence and has wide application prospect in the field of restorative dentistry.

Description

technical field [0001] The invention relates to a glass-ceramic suitable for the field of dental restoration, in particular to a lithium-aluminum-silicon-based glass-ceramic and a preparation method thereof. Background technique [0002] Lithium-aluminum-silicon glass-ceramics is a kind of composite material combining crystal phase and glass phase prepared by various oxides through melting, molding, and heat treatment processes. It belongs to an important ceramic material in the field of glass-ceramics and has excellent properties. Chemical stability, good semi-permeability, low thermal expansion coefficient and other characteristics. Its unique aesthetics and biological properties are unmatched by metal materials and polymer materials, and it has broad application prospects in the field of dental restoration. The usual preparation of lithium-aluminum-silicon-based glass-ceramics is to melt various oxides containing relatively high amounts of alumina at high temperature and...

Claims

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Application Information

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IPC IPC(8): C03C10/12A61K6/027
CPCA61K6/836C03C10/0027
Inventor 杨建锋张亚明郭海霞张辉张南龙王波
Owner XI AN JIAOTONG UNIV
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