稀有金属材料与工程
稀有金屬材料與工程
희유금속재료여공정
RARE METAL MATERIALS AND ENGINEERNG
2009年
z2期
220-222
,共3页
RE_9.33(SiO_4)_6O_2%声速%弹性模量%热导率
RE_9.33(SiO_4)_6O_2%聲速%彈性模量%熱導率
RE_9.33(SiO_4)_6O_2%성속%탄성모량%열도솔
RE_9.33(SiO_4)_6O_2%sound speed%Young's modulus%thermal conductivity
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.
利用固相反應法製備瞭高純、高緻密稀土硅痠鹽氧基燐灰石RE_9.33(SiO_4)_6O_2(RE=La, Nd, Sm, Gd)陶瓷材料,用XRD對所閤成的RE_9.33(SiO_4)_6O_2粉末和燒結得到的塊體材料進行瞭分析錶徵.繫統研究瞭RE_9.33(SiO_4)_6O_2陶瓷材料的聲子速度和彈性模量,結果錶明其平均聲速小、彈性模型低.另外,利用Cahill模型對其熱導率進行瞭理論計算,其極限熱導率在高溫下為1.18～1.22 W/m·K.從結構等各方麵推斷瞭RE_9.33(SiO_4)_6O_2陶瓷材料的低熱導可能性.
이용고상반응법제비료고순、고치밀희토규산염양기린회석RE_9.33(SiO_4)_6O_2(RE=La, Nd, Sm, Gd)도자재료,용XRD대소합성적RE_9.33(SiO_4)_6O_2분말화소결득도적괴체재료진행료분석표정.계통연구료RE_9.33(SiO_4)_6O_2도자재료적성자속도화탄성모량,결과표명기평균성속소、탄성모형저.령외,이용Cahill모형대기열도솔진행료이론계산,기겁한열도솔재고온하위1.18～1.22 W/m·K.종결구등각방면추단료RE_9.33(SiO_4)_6O_2도자재료적저열도가능성.
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.
