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	SiO_2—Al_2O_3—MgO—K_2O—MgF_2系玻璃陶瓷析晶机理及断裂机制
	邱丽莉 ; 梁开明 ; QIU Lili ; LIANG Kaiming
	2016-03-30 ; 2016-03-30
关键词	玻璃陶瓷 云母 断裂机制 析晶机理 glass-ceramics mica fracture mechanism crystallization TQ174.1
其他题名	Crystallization and Fracture Mechanism of SiO_2—Al_2O_3—MgO—K_2O—MgF_2 Glass-ceramics
中文摘要	以SiO2—Al2O3—MgO—K2O—MgF2体系玻璃为基础,采用整体析晶法,在高温条件下制备出堇青石/氟金云母玻璃陶瓷。借助于综合热分析仪、X射线衍射仪和扫描电子显微镜等分析手段,研究了玻璃陶瓷的析晶机制、显微形貌和断裂机制。结果表明:所制备的玻璃陶瓷主晶相为板条状氟金云母和β-堇青石,经1 000℃保温3h热处理后,主晶相转变为镁橄榄石;以堇青石和氟金云母为主晶相的玻璃陶瓷断裂机理为穿晶断裂,以镁橄榄石为主晶相的玻璃陶瓷为沿晶断裂。在基础玻璃中添加5%B2O3,可抑制氟金云母相的析出,并提高玻璃陶瓷的致密度。; Cordierite/fluorphlogopite glass-ceramics were fabricated with SiO2—Al2O3—MgO—K2O—MgF2composition systemvia volume crystallization during heat treatment at high temperature.The crystallization,microstructure and fracture mechanism were investigated by differential thermal analysis,X-ray diffraction and scanning electron microscopy,respectively.The results show that the main phases of the glass-ceramics are plate-like fluorphlogopite andβ-cordierite,and the main phase transforms into forsterite after heat-treated at 1 000 ℃for 3h.The fracture mechanism of cordierite/fluorphlogopite glass-ceramics is a trans-granular fracture,and that of forsterite containing glass-ceramics appears an inter-granular fracture.The addition of 5% B2O3in the material system can suppress the crystallization of fluorphlogopite and improve the density of the glass-ceramics.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/141706]
专题	清华大学
推荐引用方式 GB/T 7714	邱丽莉,梁开明,QIU Lili,等. SiO_2—Al_2O_3—MgO—K_2O—MgF_2系玻璃陶瓷析晶机理及断裂机制[J],2016, 2016.
APA	邱丽莉,梁开明,QIU Lili,&LIANG Kaiming.(2016).SiO_2—Al_2O_3—MgO—K_2O—MgF_2系玻璃陶瓷析晶机理及断裂机制..
MLA	邱丽莉,et al."SiO_2—Al_2O_3—MgO—K_2O—MgF_2系玻璃陶瓷析晶机理及断裂机制".(2016).

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