中文摘要：

以金属硝酸盐为起始原料，采用溶胶．凝胶法制备了AgxCa3-xCO4O9（X=0.1-0.6）复合氧化物粉末，SPS烧结了其块体，研究了Ag^＋掺杂量对系统物相组成及电性能的影响。结果表明，在本实验范围内随着Ag^＋掺杂量的增加，出现了单质Ag和CO3O4，与此伴随的是块体各温度点电阻率和Seebeck系数的降低．当X=0.6时，100℃时的电阻率达到最低值1.7×10^-5Ω．m，且块体导电特性由半导体转变为金属。当X=0．3，SPS烧结时间2h时功率因子达7.612×10^-4m.K^-2。

英文摘要：

Polycrystal AgxCa3-xCO4O9 powder and bulks were prepared using sol-gel and SPS method with nitrates as starting materials and the effects of Ag^＋ substitutation of Ca^2＋ on phase structure and electrical performances of bulks were investigated. The results reveals that new phasees of Ag and Co3O4 emerge with increasing substitution of Ag^＋, the Seebeck coefficient and electrical resistivity of bulks decrease accordingly.The resistivity of x=0.6 sample reaches 1.72×10^-5ohm.m at 100℃ and the conductivity exhibits characteristics of metal conduction. The power factor of x=0.3 sample calcined for 2h reaches 7.612×10^-4m.K^-2 at 700℃.