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Microcrystal glass with Li20-SiO2-P205 as main raw materials and production thereof

A technology of li2o-sio2-p2o5 and main raw materials, which is applied in the field of glass-ceramic and its preparation, can solve the problems of low crystallinity and poor mechanical properties of glass-ceramic, and achieves high crystallinity, good mechanical properties, and high preparation simple craftsmanship

Inactive Publication Date: 2006-05-31
HARBIN INST OF TECH
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AI Technical Summary

Problems solved by technology

[0003] The present invention proposes a Li 2 O-SiO 2 -P 2 o 5 Be the crystallized glass of main raw material and preparation method thereof, the specific technical scheme of this method to solve the problem is as follows:

Method used

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specific Embodiment approach 1

[0012] Specific embodiment one: the glass-ceramics of this embodiment is made of SiO 2 , Li 2 O.P 2 o 5 , ZnO, K 2 O and CaO are raw materials, and the content of each raw material is SiO 2 : 60~75wt%, Li 2 O: 15-18wt%, P 2 o 5 : 2~11wt%, ZnO: 2.5~3.5wt%, K 2 O: 4 to 6.5 wt%, CaO: 1 to 1.5 wt%.

specific Embodiment approach 2

[0013] Specific embodiment two: the glass-ceramics of this embodiment is made of SiO 2 : 64.5wt%, Li 2 O: 18wt%, P 2 o 5 : 8wt%, ZnO: 2wt%, K 2 O: 6.5 wt%, CaO: 1 wt%.

specific Embodiment approach 3

[0014] Specific embodiment three: the glass-ceramic of this embodiment is made of SiO 2 : 71wt%, Li 2 O: 15wt%, P 2 o 5 : 6wt%, ZnO: 2.5wt%, K 2 O: 4wt%, CaO: 1.5wt% composition.

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Abstract

A glass ceramics with Li2O-SiO2-P2O5 as main materials and its production are disclosed. The glass ceramics consists of SiO2:60í½75wt%, Li2O:15í½18wt%, P2O5:2í½11wt%, ZnO:2.5í½3.5wt%, K2O:4í½6.5wt% and CaO:1í½1.5wt%. The process is carried out by ball grinding, drying, melting the powders in crucible, water quenching the obtained glass solution into blocked glass, ball grinding the glass into powder, placing the powder in hot-pressure sintering furnace, pressurizing by single axle, sintering, mould releasing and cooling to obtain glass ceramics with lithium disilicate. The crystal has better devitrification and mechanical performances.

Description

technical field [0001] The present invention relates to glass-ceramic and its preparation method. Background technique [0002] Since the successful development of glass-ceramics in the late 1950s, remarkable achievements have been made in the fields of mechanical electronics, aerospace industry, and biomedicine. In particular, biological glass-ceramic as a new type of oral restorative material has its unique advantages. All-ceramic restoration has become one of the main development trends in fixed oral restorations today. In 1986, Ivoclar and the University of Zurich jointly developed the leucite (leucite) glass ceramic IPS Empress, which has been widely used in the preparation of dental glass ceramic materials by hot pressing into the preparation process. However, the bending strength of leucite-based glass-ceramics is low, only 160-180 MPa, which cannot be used for the repair of fixed bridges. In 1998, the company still adopted the hot-press casting process to launch I...

Claims

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Application Information

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IPC IPC(8): C03C10/00C03B32/02C03C10/10
CPCC03C3/097
Inventor 温广武郑欣宋亮
Owner HARBIN INST OF TECH
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