柠檬酸钠与草酸铌合成NaNbO3粉体的反应机理

摘要

Sodium niobate(NaNbO3) was synthesized by the thermal decomposion method using sodium citrate and niobium oxalate as raw materials. The reaction mechanism for the synthesis of sodium niobate (NaNbO3) was investigated. Thermal gravimetrie analysis(TGA) and fourier transform infrared spectroscopy(FTIR) were used for the analyzing the precusor. The results showed that the metathesis reaction took place in the grinding of raw materials, when the precursor was heated, its decomposition mainly occurred at the temperature of 200～430℃. Sodium niobate (NaNbO3) was obtained at 425℃.%以柠檬酸钠和草酸铌为原料,采用热分解法合成了铌酸钠,研究了铌酸钠合成的反应机理.利用傅里叶变换红外光谱仪(FTIR),热重分析仪(TG)对前躯体进行分析.结果表明,在研磨过程中原料发生复分解反应.前躯体加热过程中,其分解主要发生在200～430℃温度段内,在425℃生成了铌酸钠(NaNbO3).