Dependance of Microstructure and Properties on Preparation Process for Ca-Doped LaCrO_3

The powder of LaCrO_3 was prepared by the soild reaction method.The microstructure of the sintered samples was studied by SEM.The influence of the Ca content,different sythesized conditions and sintered time on the shrinkage ratio and electrical resistivity was investigated.It was found that electrical resistivity decreased,shrinkage ratio increased,sintered property improved with the Ca content increasing.The shrinkage ratio of samples increases appreciably with increasing sythesied temperature of the powder.The change of the electrical resistivity is not obvious,but the shrinkage ratio and density increase with the sintering time..