| RE_(9.33)(SiO_4)_6O_2陶瓷的制备及其热学性能 |
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| 引用本文： | 吴瑞芬,瞿志学,潘伟.RE_(9.33)(SiO_4)_6O_2陶瓷的制备及其热学性能[J].稀有金属材料与工程,2009,38(Z2). |
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| 作者姓名： | 吴瑞芬 瞿志学 潘伟 |
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| 作者单位： | 清华大学,新型陶瓷与精细工艺国家重点实验室,北京100084 |
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| 基金项目： | 国家自然科学基金资助 |
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| 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RE_9.33(SiO_4)_6O_2(RE=La, Nd, Sm, Gd)陶瓷材料,用XRD对所合成的RE_9.33(SiO_4)_6O_2粉末和烧结得到的块体材料进行了分析表征.系统研究了RE_9.33(SiO_4)_6O_2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1.18～1.22 W/m·K.从结构等各方面推断了RE_9.33(SiO_4)_6O_2陶瓷材料的低热导可能性.
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| 关 键 词： | 声速 弹性模量 热导率 |
Synthesis and Thermal Performance of RE_(9.33)(SiO_4)_6O_2 Ceramics |
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| Wu Ruifen,Qu Zhixue,Pan Wei.Synthesis and Thermal Performance of RE_(9.33)(SiO_4)_6O_2 Ceramics[J].Rare Metal Materials and Engineering,2009,38(Z2). |
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| Authors: | Wu Ruifen Qu Zhixue Pan Wei |
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| Affiliation: | Wu Ruifen,Qu Zhixue,Pan Wei (State Key Lab of New Ceramics , Fine Processing,Tsinghua University,Beijing 100084,China) |
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| Abstract: | High density and pure silicate oxyapatite RE_9.33(SiO_4)_6O_2 (RE=La, Nd, Sm, Gd) ceramics were synthesized by solid state reaction. The RE_9.33(SiO_4)_6O_2 powder and sintered RE_9.33(SiO_4)_6O_2 bulk 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 RE_9.33(SiO_4)_6O_2 ceramics. |
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| Keywords: | RE_9 33(SiO_4)_6O_2 RE_9 33(SiO_4)_6O_2 sound speed Young's modulus thermal conductivity |
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