固相法によるTazheraniteの粉末合成と導電性 倉持 豪人 小林 秀彦 森 利之 山村 博 三田村 孝 社団法人日本セラミックス協会 日本セラミックス協会学術論文誌 : Nippon Seramikkusu Kyokai gakujutsu ronbunshi 09145400 100 1165 1135 1139 1992-09-01 rights: 社団法人日本セラミックス協会rights: 本文データは学協会の許諾に基づきCiNiiから複製したものであるrelation: IsVersionOf: http://ci.nii.ac.jp/naid/110002290089/Ca_<0.20>Zr_<0.80-x>Ti_xO_y composition (x=0.04-0.25) powders, whose phases were the tazheranite (x=0.04-0.10) and the calzirtite (x=0.20) of single phases, were prepared at 1300℃ for 10h by the solid phase reaction. The range of the tazheranite composition was broadened up to x= 0.15 by firing them at 1500℃ for 4-10h. The conductivity of the sintered bodies, fabricated at 1500℃ for 4h in x=0.04-0.15 and 10h in x=0.20, was measured at 400°-900℃ using the complex impedance method in the air. The activation energies of the conductivity were 120-130 kJ/mol, thus it is presumed that the mechanism of electric conduction was dominated by an oxygen ion conduction in the range of these temperatures. In the case of x=0.04-0.15 composition samples, the resistance of grain decreased with an increase of x, while that of grain boundary increased. With regard to the calzirtite (x=0.20) composition sintered body, it is made ascertained that the specific resistance took a figure up one place. The results have suggested that the elevation of conductivity is due to the increase of dissolved TiO_2 amount, the valence deviation of Ti, the change of grain size and the segregation of a trace amount of calzirtite phase at the grain boundaries of the tazheranite of single phase. 1992-09-01 110002290089 AN10040326 3784289 JPN NDL NII-ELS IR Journal@rchive 3 Preparation of Tazheranite Powders by Solid Phase Reaction and Conductivity of Sintered Bodies KURAMOCHI Hideto KOBAYASHI Hidehiko MORI Toshiyuki YAMAMURA Hiroshi MITAMURA Takashi The Ceramic Society of Japan Journal of the Ceramic Society of Japan Ca_<0.20>Zr_<0.80-x>Ti_xO_y composition (x=0.04-0.25) powders, whose phases were the tazheranite (x=0.04-0.10) and the calzirtite (x=0.20) of single phases, were prepared at 1300℃ for 10h by the solid phase reaction. The range of the tazheranite composition was broadened up to x= 0.15 by firing them at 1500℃ for 4-10h. The conductivity of the sintered bodies, fabricated at 1500℃ for 4h in x=0.04-0.15 and 10h in x=0.20, was measured at 400°-900℃ using the complex impedance method in the air. The activation energies of the conductivity were 120-130 kJ/mol, thus it is presumed that the mechanism of electric conduction was dominated by an oxygen ion conduction in the range of these temperatures. In the case of x=0.04-0.15 composition samples, the resistance of grain decreased with an increase of x, while that of grain boundary increased. With regard to the calzirtite (x=0.20) composition sintered body, it is made ascertained that the specific resistance took a figure up one place. The results have suggested that the elevation of conductivity is due to the increase of dissolved TiO_2 amount, the valence deviation of Ti, the change of grain size and the segregation of a trace amount of calzirtite phase at the grain boundaries of the tazheranite of single phase. 倉持 豪人 KURAMOCHI Hideto 埼玉大学工学部応用化学科 Department of Applied Chemistry, Faculty of Engineering, Saitama University 小林 秀彦 KOBAYASHI Hidehiko 埼玉大学工学部応用化学科 Department of Applied Chemistry, Faculty of Engineering, Saitama University 森 利之 MORI Toshiyuki 東ソー(株)筑波研究所 Tsukuba Research Laboratory, TOSOH Co. 山村 博 YAMAMURA Hiroshi 東ソー(株)筑波研究所 Tsukuba Research Laboratory, TOSOH Co. 三田村 孝 MITAMURA Takashi 埼玉大学工学部応用化学科 Department of Applied Chemistry, Faculty of Engineering, Saitama University