title: [Effect of K2O addition on the crystallization property of dental glass-ceramics].
abstract: 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.
authors.affiliation: Dept. of Prosthodontics, School of Stomatology, Jilin University, Changchun 130041, China.
authors.forename: Xiao-Qiu
authors.initials: XQ
authors.lastname: Liu
authors.forename: Wen-Zhi
authors.initials: WZ
authors.lastname: Song
authors.forename: Hong-Chen
authors.initials: HC
authors.lastname: Sun
authors.forename: Hai-Bin
authors.initials: HB
authors.lastname: Yang
authors.forename: Guang-Tian
authors.initials: GT
authors.lastname: Zou
authors.forename: Jing-Yun
authors.initials: JY
authors.lastname: Wang
authors.forename: Chang-Li
authors.initials: CL
authors.lastname: Ye
mesh_terms: D002516:Ceramics; D003460:Crystallization; D003776:Dental Porcelain; D005898:Glass; D006358:Hot Temperature; D008855:Microscopy, Electron, Scanning; D012822:Silicon Dioxide; D014961:X-Ray Diffraction
chemical_list: C493120:lithia disilicate; D003776:Dental Porcelain; D012822:Silicon Dioxide; C023506:Glass ceramics