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http://dx.doi.org/10.3740/MRSK.2002.12.3.169

Preparation and PTCR Characteristics of Semiconductive Nano (Ba1-xSbx)TiO3 Ceramic PowderS by Hydrothermal Process  

Choe, Yong-Gak (Dept. of Metallurgical Eng., Chungnam National University)
Lee, Jong-Hyeon (Rapidly Solidified Advanced Materials Research Center, Chungnam National University)
Lee, Hyeok-Hui (Korea research Institute of Chemical Technology)
Won, Chang-Hwan (Dept. of Metallurgical Eng., Chungnam National University)
Publication Information
Korean Journal of Materials Research / v.12, no.3, 2002 , pp. 169-175 More about this Journal
Abstract
Semiconductive nano $(Ba_{1-x}Sb_x)TiO_3$ powders were synthesized by the hydrothermal process and Sb was simultaneously doped in the hydrothermal condition. $(Ba_{1-x}Sb_x)TiO_3$ powders obtained from optimum condition(at 20$0^{\circ}C$ for 3hr) exhibited spherical shape, high purity and nano size. The PTCR characteristics was observed when 0.1 and 0.2 mole% Sb were added and sintered at over 130$0^{\circ}C$ for 1 hour, respectively. And The ceramics exhibit the PTCR characteristics with a resistively jump $ratio($\rho$_{max}/$\rho$_{min})$ of about $10^4$. Also we found that PTCR characteristics were dependent on the microstructure.
Keywords
Semiconductive $({Ba_{1-x}}Sb_{x})TiO_3$; Hydrothermal process; PTCR effects;
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