Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Lithium disilicate microcrystalline glass material prepared by using hybrid reaction sintering method and method

A lithium disilicate and glass-ceramic technology, which is applied in the field of lithium disilicate glass-ceramic materials, can solve the problems of reducing color matching, difficulties, and toughening of melting methods, and achieves reduced production costs, excellent performance, and improved fracture toughness Effect

Active Publication Date: 2014-02-05
XI AN JIAOTONG UNIV
View PDF8 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned problems in the prior art, the object of the present invention is to provide a lithium disilicate glass-ceramic material prepared by a mixed reaction sintering method and a method thereof, which reduces the production cost and allows the required pigment to be sintered before sintering. Adding it to the mixed powder solves the problems of color matching difficulties in the fusion method, and can prepare long rod-shaped grains up to 5 times the size of a single glass powder sintered, opening up a new way for toughening lithium disilicate glass-ceramics

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Lithium disilicate microcrystalline glass material prepared by using hybrid reaction sintering method and method
  • Lithium disilicate microcrystalline glass material prepared by using hybrid reaction sintering method and method
  • Lithium disilicate microcrystalline glass material prepared by using hybrid reaction sintering method and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] The preparation method of the lithium disilicate glass-ceramic material prepared by the mixed reaction sintering method of the present invention comprises the following steps:

[0029] Step 1: According to the raw material composition ratio of the original lithium metasilicate glass, Li 2 O:SiO 2=1:1 (molar ratio) Weigh the oxide raw material, put the oxide raw material in a corundum jar and wet mix it for 2 hours, then use a rotary evaporator to dry the evenly mixed slurry, and then put it into a quartz crucible In silicon-molybdenum rod resistance furnace, heat up to 1200-1400°C at a heating rate of 2°C / min-10°C / min and keep it warm for 1-3 hours. The original lithium metasilicate glass powder obtained after ball milling at a speed of 300 rpm for 1 to 15 hours has a particle size of 5 to 30 μm; the process parameters of spe...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
flexural strengthaaaaaaaaaa
flexural strengthaaaaaaaaaa
Login to View More

Abstract

The invention provides a lithium disilicate microcrystalline glass material prepared by using a hybrid reaction sintering method and the method. Raw materials for the material comprise lithium metasilicate crystal powder M, quartz sand glass powder S and lithium disilicate basic glass powder D, wherein a mol ratio of M to S to D is 1: 1-2: 0-8. The method comprises the following steps: subjecting lithium metasilicate glass and lithium disilicate basic glass to melting, water quenching and ball milling so as to prepare glass powder; subjecting lithium metasilicate glass powder to crystallization to obtain a crystal; adding the quartz sand glass powder and the lithium disilicate basic glass powder D; and uniformly mixing the above-mentioned three powders and carrying out sintering in a vacuum hot-pressing furnace so as to prepare lithium disilicate microcrystalline glass. The lithium disilicate microcrystalline glass produced by using the method has bending strength of 255 to 420 MPa and fracture toughness of 2.6 MPa.m1 / 2 to 3.5 MPa.m1 / 2. Compared with the prior art, the invention has the following advantages: production cost is reduced; desired pigments can be added into the mixed powder before sintering, which enables the problem of difficult color matching in a melting method to be overcome; a long rod-like crystal grain with length 5 times the size of a single glass powder sintered body is prepared; and a novel approach is opened up for toughening the lithium disilicate microcrystalline glass.

Description

technical field [0001] The invention belongs to the technical field of engineering ceramic preparation, and in particular relates to a lithium disilicate glass-ceramic material prepared by a mixed reaction sintering method and a method thereof. Background technique [0002] Lithium disilicate glass-ceramic is a series of precipitated lithium disilicate (Li 2 Si 2 o 5 ) is a general term for glass-ceramics with the main crystal phase. Its main component is Li 2 O and SiO 2 , in addition to adding P 2 o 5 , B 2 o 3 , ZrO 2 、K 2 O, Al 2 o 3 , CaO, CeO 2 , La 2 o 3 and other components to play the role of flux, nucleating agent and so on. In recent decades, researchers have conducted a lot of exploration and research on the composition design technology of basic glass, the nucleation and crystallization mechanism of glass-ceramics, the preparation technology of glass-ceramics and the relationship between composition-structure-performance, but fracture toughness, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/04
Inventor 杨建锋赵婷秦毅张佩王波李春芳
Owner XI AN JIAOTONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com