中文摘要：

以H2O2为助剂,对氯化镧溶液通过喷雾热解法制备氢氧化镧的工艺进行了研究,首先通过热力学分析获得了H2O2与氯化镧反应的起始温度为288℃,并进一步研究了热解温度、氯化镧溶液质量浓度、H2O2添加量及载气压力对氢氧化镧转化率的影响.通过氯含量测定,XRD及SEM分析,获得了优化的工艺条件为：热解温度600℃,氯化镧溶液质量浓度400 g/L,H2O2加入量5%,载气压力0.4 MPa,在此条件下得到了转化率为99.96%的碎片状La（OH）3.

英文摘要：

Using H2O2 as auxiliary reagent,the preparation of lanthanum hydroxide by spray pyrolysis of lanthanum chloride was studied. The thermodynamic principle was used to calculate the starting temperature of lanthanum chloride reaction with H2O2,and it is 288 ℃. The effect of pyrolysis temperature,La Cl3 solution concentration,H2O2 addition and carrier gas pressure on the conversion ratio of La（ OH）3was experimentally studied. The Cl concent analysis,XRD and SEMindicate that the optimum conditions for the pyrolysis are temperature of 600 ℃,La Cl3 solution concentration of 400 g / L,H2O2 addition of 5% and carrier gas pressure of 0. 4 MPa,resulting in the conversion of 99. 96% with debris shape La（ OH）3.