Controlled crystallization of xenotime and monazite-type crystals in glass-ceramics

被引：0

作者：

Ritzberger, C. ^{[1
]}

Apel, E. ^{[1
]}

Rheinberger, V. M. ^{[1
]}

Schweiger, M. ^{[1
]}

Hoeland, W. ^{[1
]}

机构：

[1] Ivoclar Vivadent AG, Res & Dev, FL-9494 Schaan, Liechtenstein

来源：

PHYSICS AND CHEMISTRY OF GLASSES-EUROPEAN JOURNAL OF GLASS SCIENCE AND TECHNOLOGY PART B | 2013年 / 54卷 / 05期

关键词：

D O I：

暂无

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Glasses derived from the chemical system of SiO2-Al2O3-CaO/SrO-Y2O3/La2O3-P2O5-F with further additives of B2O3, Na2O, K2O were formed by producing glass fits. Glass-ceramic powder compacts were produced by heat treating the glass grains in a temperature range of 800 up to 1050 degrees C. Special glass-ceramic compositions were shown to precipitate xenotime (YPO4) and monazite-type (LaPO4) crystals in the glass matrix. The microstructure of glass-ceramics with main crystals of monazite and xenotime and secondary phases was analyzed by scanning electron microscopy (SEM). The glass-ceramics in question are characterized by a coefficient of thermal expansion (CTE) of 9.5 to 10.6x10(-6) K-1 (100-400 degrees C). According to biomaterials standards for dental products, these glass-ceramics show good chemical durability (in acetic acid) and translucency (measured as a contrast ratio value of 60-70).

引用

页码：228 / 231

页数：4

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