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Al2O3 ceramics doping with Y3+ and La3+ are synthesized by conventional solid state reaction method. The structures, thermal conductivities properties and the effects of sintering temperature on the electrical properties of the samples are measured. X-ray diffraction results indicate that all the ceramics are formed to be of pure solid solution when the samples are sintered at 1500℃. Thermal conductivities of Al2O3 ceramics reach up to 8.60 W/(m· K). All the ceramics show temperature-stable dielectric characteristics. Typical dielectric relaxation behaviors are observed in Y- and La-doped Al2O3 ceramics, and the relaxation mechanism is also analyzed.
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Keywords:
- Al2O3 /
- ceramics /
- thermal conductivity /
- dielectric relaxation
[1] Svilainis L 2008 Displays 29 506
[2] Kee R J, Almand B B, Blasi J M, Rosen B L, Hartmann M, Sullivan N P, Zhu H Y, Manerbino A R, Menzer S, Grover Coors W, Martin J L 2011 Appl. Thermal. Eng. 31 2004
[3] Yin L Q, Yang L Q, Yang W Q, Guo Y S, Ma K J, Li S Z, Zhang J H 2010 Solid-State Electron 54 1520
[4] Peng R, Zhou H P, Ning X S, Xu W, Lin Y B 2002 J. Inorg. Mater. 17 731 (in Chinese) [彭榕, 周和平, 宁晓山, 徐伟, 林渊博 2002 无机材料学报 17 731]
[5] Mu B C, Sun X D 2002 J. Chin. Rare Earth Soc. 20 z104 (in Chinese) [穆柏春, 孙旭东 2002 中国稀土学报 20 z104]
[6] Yang Q H, Zeng Z J, Xu J, Su L B 2006 Acta Phys. Sin. 55 2726 (in Chinese) [杨秋红, 曾智江, 徐军, 苏良碧 2006 55 2726]
[7] Yao Y J, Qiu T, Jiao B X, Shen C Y 2005 J. Chin. Rare Earth Soc. 23 158 (in Chinese) [姚义俊, 邱泰, 焦宝祥, 沈春英 2005 中国稀土学报 23 158]
[8] Chen D G, Tang X G, Jia Z H, Wu J B, Xiong H F 2011 Acta Phys. Sin. 60 127701 (in Chinese) [陈东阁, 唐新桂, 贾政华, 伍君博, 熊惠芳 2011 60 127701]
[9] Huang L P, Zhao H F, Fu X R, Dong L J 1989 J. Inorg. Mater. 4 217 (in Chinese) [黄莉萍, 赵惠芬, 符锡仁, 董良金 1989 无机材料学报 4 217]
[10] Zhou H P, Zhou J S 1995 J. Inorg. Mater. 10 439 (in Chinese) [周和平, 周劲松 1995 无机材料学报 10 439]
[11] Ferrarelli M C, Sinclair D C, West A R, Dabkowska H A, Dabkowski A, Luke G M 2009 J. Mater. Chem. 19 5916
[12] Sarkar S, Jana P K, Chaudhuri B K 2008 Appl. Phys. Lett. 92 022905
[13] Cole K S, Cole R H 1941 J. Chem. Phys. 9 341
[14] Sinclair D C, West A R 1989 Phys. Rev. B 39 13486
[15] Kim J S, Choi B C, Jeong J H, Chung S T, Cho S B, Kim I W 2009 J. Kor. Phys. Soc. 55 879
[16] Elissalde C, Ravez J 2001 J. Mater. Chem. 11 1957
[17] Kuang S J, Tang X G, Li L Y, Jiang Y P, Liu Q X 2009 Scripta Mater. 61 68
[18] Tang X G, Wang J, Wang X X, Chan H L W 2004 Solid State Commun. 131 163
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[1] Svilainis L 2008 Displays 29 506
[2] Kee R J, Almand B B, Blasi J M, Rosen B L, Hartmann M, Sullivan N P, Zhu H Y, Manerbino A R, Menzer S, Grover Coors W, Martin J L 2011 Appl. Thermal. Eng. 31 2004
[3] Yin L Q, Yang L Q, Yang W Q, Guo Y S, Ma K J, Li S Z, Zhang J H 2010 Solid-State Electron 54 1520
[4] Peng R, Zhou H P, Ning X S, Xu W, Lin Y B 2002 J. Inorg. Mater. 17 731 (in Chinese) [彭榕, 周和平, 宁晓山, 徐伟, 林渊博 2002 无机材料学报 17 731]
[5] Mu B C, Sun X D 2002 J. Chin. Rare Earth Soc. 20 z104 (in Chinese) [穆柏春, 孙旭东 2002 中国稀土学报 20 z104]
[6] Yang Q H, Zeng Z J, Xu J, Su L B 2006 Acta Phys. Sin. 55 2726 (in Chinese) [杨秋红, 曾智江, 徐军, 苏良碧 2006 55 2726]
[7] Yao Y J, Qiu T, Jiao B X, Shen C Y 2005 J. Chin. Rare Earth Soc. 23 158 (in Chinese) [姚义俊, 邱泰, 焦宝祥, 沈春英 2005 中国稀土学报 23 158]
[8] Chen D G, Tang X G, Jia Z H, Wu J B, Xiong H F 2011 Acta Phys. Sin. 60 127701 (in Chinese) [陈东阁, 唐新桂, 贾政华, 伍君博, 熊惠芳 2011 60 127701]
[9] Huang L P, Zhao H F, Fu X R, Dong L J 1989 J. Inorg. Mater. 4 217 (in Chinese) [黄莉萍, 赵惠芬, 符锡仁, 董良金 1989 无机材料学报 4 217]
[10] Zhou H P, Zhou J S 1995 J. Inorg. Mater. 10 439 (in Chinese) [周和平, 周劲松 1995 无机材料学报 10 439]
[11] Ferrarelli M C, Sinclair D C, West A R, Dabkowska H A, Dabkowski A, Luke G M 2009 J. Mater. Chem. 19 5916
[12] Sarkar S, Jana P K, Chaudhuri B K 2008 Appl. Phys. Lett. 92 022905
[13] Cole K S, Cole R H 1941 J. Chem. Phys. 9 341
[14] Sinclair D C, West A R 1989 Phys. Rev. B 39 13486
[15] Kim J S, Choi B C, Jeong J H, Chung S T, Cho S B, Kim I W 2009 J. Kor. Phys. Soc. 55 879
[16] Elissalde C, Ravez J 2001 J. Mater. Chem. 11 1957
[17] Kuang S J, Tang X G, Li L Y, Jiang Y P, Liu Q X 2009 Scripta Mater. 61 68
[18] Tang X G, Wang J, Wang X X, Chan H L W 2004 Solid State Commun. 131 163
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