EFFECTS OF SINTERING CONDITIONS ON HYDROXYAPATITE FOR USE IN MEDICAL APPLICATIONS - A POWDER DIFFRACTION STUDY

被引:13
作者
ABRAHAMS, I [1 ]
KNOWLES, JC [1 ]
机构
[1] UNIV LONDON,QUEEN MARY & WESTFIELD COLL,IRC BIOMED MAT,LONDON E1 4NS,ENGLAND
关键词
D O I
10.1039/jm9940400185
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
Commercially available hydroxyapatite (HA) has been subjected to different temperatures and sintering-time schedules to examine the effects of these two variables on crystal structure. Small but significant decreases in unit-cell volume and hydroxy-ion channel size are seen on sintering for 1 h at temperatures in excess of 1000-degrees-C. This has been ascribed to the loss of small amounts of carbonate from the channels within the structure. The stability of the HA phase was seen up to a sintering temperature of 1400-degrees-C, with decomposition only seen in the 1450-degrees-C sinter. Extended sintering times at 1300-degrees-C failed to cause decomposition; however, small increases in c-axis length and unit-cell volume were observed.
引用
收藏
页码:185 / 188
页数:4
相关论文
共 10 条