摘要
用TG-DTA-DTG,XRD,IR谱方法研究了掺钴锂锰氧化物LiCoxMn2-xO4的合成机理及红外光谱变化规律,并通过磁化率的测定考查了化合物中Co3+,Mn3+的价电子填充规律.结果表明:蒸发Li2CO3,Co(CH3COO)2·4H2O,Mn(CH3COO)2·4H2O混合溶液之后,对其烧结制备LiCoxMn2-xO4的过程大致可分为吸附水的失去,结晶水的失去,Li2CO3,Co(CH3COO)2,Mn(CH3COO)2的分解并生成LiCoxMn2-xO44个阶段,烧结产物LiCoxMn2-xO4的红外光谱图形状基本相同,但吸收峰的位置随烧结温度和钴含量(摩尔分数)的不同而略有变化,但其磁化率的变化只与温度有关.
The synthetic mechanism and the change regularity of IR spectra on LiCo_xMn_(2-x)O_4 were studied by means of TG-DTA-DTG,XRD and IR spectra,and magnetic susceptibility measurements indicated the types of electronic configurations of Co^(3+) and Mn^(3+) in LiCo_xMn_(2-x)O_4.The results show that the synthesis of (LiCo_xMn_(2-x)O_4) by evaporating a mixture solution of Li_2CO_3,Co(CH_3COO)_2·4H_2O and (Mn(CH_3COO)_2·4H_2O) and then sintering consists of four stages:loss of adsorbed water,loss of water of crystallization,resolution of Li_2CO_3,Co(CH_3COO)_2,Mn(CH_3COO)_2 and produce of LiCo_xMn_(2-x)O_4.The figures of the infrared spectra of LiCo_xMn_(2-x)O_4 are quite similar while the position of the transmission peaks change with the sintering temperature and cobalt content.However,its magnetic susceptibility is only dependent on sintering temperature,independent of cobalt content.
出处
《郑州轻工业学院学报（自然科学版）》
CAS
2003年第3期21-23,共3页
Journal of Zhengzhou University of Light Industry:Natural Science
