Effect of K2O addition on the crystallization property of dental glass-ceramics.
- Author:
Xiao-qiu LIU
1
;
Wen-zhi SONG
;
Hong-chen SUN
;
Hai-bin YANG
;
Guang-tian ZOU
;
Jing-yun WANG
;
Chang-li YE
Author Information
- Publication Type:Journal Article
- MeSH: Ceramics; Crystallization; Dental Porcelain; Glass; Hot Temperature; Microscopy, Electron, Scanning; Silicon Dioxide; X-Ray Diffraction
- From: West China Journal of Stomatology 2006;24(5):407-409
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo evaluate the effect of K2O addition on the crystallization property of dental glass-ceramics in the Li2O-SiO2-Al2O3-P2O5-ZnO system.
METHODSDifferent content of K2O was added into Li2O-SiO2-Al2O3-P2O5-ZnO glass system. The heat-treated system of the glass-ceramics was determined by differential thermal analyses (DTA), then the crystallization components and the microstmcture of the glass-ceramics with different content of K2O were investigated from X-ray diffraction (XRD) analyses and scanning electron microscopy (SEM).
RESULTSAddition of K2O helped to reduce the viscosity of the glass system and improved crystallization. More lithium disilicate crystals appeared after heated-treatment of the glass system which contained 5.3 wt% addition of K2O, and the homogeneously lath-shaped crystals were 4 gm in length.
CONCLUSIONCertain content of K2O can improve the crystallization property of dental glass-ceramics in the Li2O-SiO2-Al2O3-P2O5-ZnO system.
