[Effect of K2O addition on the crystallization property of dental glass-ceramics].
OBJECTIVE
To evaluate the effect of K2O addition on the crystallization property of dental glass-ceramics in the Li2O-SiO2-Al2O3-P2O5-ZnO system.


METHODS
Different 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).


RESULTS
Addition 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.


CONCLUSIONS
Certain content of K2O can improve the crystallization property of dental glass-ceramics in the Li2O-SiO2-Al2O3-P2O5-ZnO system.
Liu
Xiao-Qiu
XQ
Dept. of Prosthodontics, School of Stomatology, Jilin University, Changchun 130041, China.
Song
Wen-Zhi
WZ
Sun
Hong-Chen
HC
Yang
Hai-Bin
HB
Zou
Guang-Tian
GT
Wang
Jing-Yun
JY
Ye
Chang-Li
CL
D002516:Ceramics; D003460:Crystallization; D003776:Dental Porcelain; D005898:Glass; D006358:Hot Temperature; D008855:Microscopy, Electron, Scanning; D012822:Silicon Dioxide; D014961:X-Ray Diffraction
C493120:lithia disilicate; D003776:Dental Porcelain; D012822:Silicon Dioxide; C023506:Glass ceramics