期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 40, 期 2, 页码 463-471出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2019.09.044
关键词
Crystallization; Y2O3; Glass ceramics; Structure
资金
- National Natural Science Foundation of China [51974168, 51662033, 51362019]
- Natural Science Foundation of the Inner Mongolia Autonomous Region [2016JQ05]
The crystallization of four Y2O3-Al2O3-SiO2 (YAS) glasses were investigated to prepare YAS glass ceramics precipitated singly/mainly Y2Si2O7 or Y-4.67(SiO4)(3)O apatite, and to explore the crystallization difference between the stoichiometric parent glass (SPG) and non-stoichiometric parent glass (NSPG). The DSC results revealed that glass locating at the higher liquidus surface temperature has lower crystallization peak temperature, which indicating that the corresponding glass has higher crystallization potential to crystallize easily. Crystallization of the NSPG samples is along surface and caused by phase separation, while SPG sample is the surface crystallization at the first exothermic peak temperature and overall crystallization at the second exothermic peak temperature. Glass ceramics only containing y-Y2Si2O7 or Y-4.67(SiO4)(3)O apatite are obtained successfully, and which are illustrated by fitting FUR spectra. These results can provide technical guide for controlling the crystallization process and the types of precipitated crystals in YAS glass for different application potentials.
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