双掺杂钙钛矿型复合氧化物La_(0.7)Sr_(0.3)Co_(1-x)M_xO_3的电性能研究

Studies on Conductive Performance of Double Doped Perovskite mixed Oxides La_(0.7) Sr_(0.3) Co_(1-x) M_x O_3

以开发新型激光器阴极材料和固体氧化物燃料电池阴极材料为目的 ,合成一系列钙钛矿型复合氧化物 La0 .7Sr0 .3 Co1- x Mx O3 ( M:过渡族金属元素 ) ,并对 Co位掺杂过渡族元素后样品的高温电阻率和热电动势进行研究 ,发现 Co位掺杂不同元素显著影响材料的电导率和导电类型 ,并对其相应的物理机制进行探讨 .

In order to develop novel cathod materials for gas laser and solid oxide fuel cells, a series of complex oxide materials of La 0.7 Sr 0.3 Co 1-x M x O 3 (M=Fe, Ni, Mn, Cu; x =0.2, 0.4, 0.6) with the perovskite structure was synthesized. The high temperature conductivity and the thermal electric mobile force of these materials with the substitution of transition metal for Co were studied. According to the results, the conductivity and electrical conduction type were influenced by the substitution of different elements for Co. The corresponding mechanisms were discussed.