摘要
利用固相反应法制备了高纯、高致密稀土硅酸盐氧基磷灰石RE9.33(SiO4)6O2(RE=La,Nd,Sm,Gd)陶瓷材料,用XRD对所合成的RE9.33(SiO4)6O2粉末和烧结得到的块体材料进行了分析表征。系统研究了RE9.33(SiO4)6O2陶瓷材料的声子速度和弹性模量,结果表明其平均声速小、弹性模型低。另外,利用Cahill模型对其热导率进行了理论计算,其极限热导率在高温下为1.18～1.22W/m.K。从结构等各方面推断了RE9.33(SiO4)6O2陶瓷材料的低热导可能性。
High density and pure silicate oxyapatite RE9.33（SiO4）6O2 （RE=La, Nd, Sin, Gd） ceramics were synthesized by solid state reaction. TheRE9.33（SiO4）6O2 powder and sintered RE9.33（SiO4）6O2bulk were observed by XRD. The sound speed and Young＇s modulus were characterized. Besides, the ultimate thermal conductivity were calculated by Cahill model of 1.18-1.22 W/m.K at high temperature. We inferred the possibility of low thermal conductivity of RE9.33（SiO4）6O2 ceramics.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2009年第A02期220-222,共3页
Rare Metal Materials and Engineering
基金
国家自然科学基金资助(50232020
50572042)
