Tm_2O_3超微粉末的制备与性质  

Preparation and Properties of Tm_2O_3 Ultrafine Powders

作　　者：董相廷[1] 洪广言[1] 于得财 

机构地区：[1]长春光学精密机械学院材料工程系,中国科学院长春应用化学研究所

出　　处：《无机材料学报》1996年第3期542-546,共5页Journal of Inorganic Materials

基　　金：中国科学院稀土化学与物理开放实验室与长春光机学院青年基金

摘　　要：以乙醇为分散剂和保护剂，用沉淀法制备了Ｔｍ（ＯＨ）_３、Ｔｉｎ_２Ｏ_３超微粉末．ＸＲＤ分析表明，Ｔｍ（ＯＨ）_３为无定形；不同温度焙烧所得到的Ｔｍ_２Ｏ_３均为立方晶系，空间群为Ｔ５－１２１３．计算表明，随焙烧温度的升高，Ｔｍ_２Ｏ_３晶粒增大，平均晶格畸变率减小．ＴＥＭ分析表明，超微粒子呈球形．在酸中溶解性试验表明，Ｔｍ_２Ｏ_３粒子越小，溶解百分率越大．红外光谱分析表明，超微Ｔｍ_２Ｏ_３比多晶Ｔｍ_２Ｏ_３具有更高的表面活性，Ｔｍ－Ｏ键的吸收具有微小的蓝移，吸收强度减弱．Tin(OH)3 and Tm_2O_3 ultrafine powders were prepared by precipitation method using alcohol as dispersive and protective reagent. XRD analysis revealed that Tin(OH)_3 ultrafine powders were amorphous, Tm_2O_3 ultrafine powders calcined at different temperatures were cubic in structure, space group was T￣5-12_13. Calculation indicated that Tm_2O_3 crystallite size increased with the increase of calcination temperatures, but average crystal lattice distortion rate decreased with the increase of calcining temperature and crystallite size. Solubility test in concentrated nitric acid indicated that the smaller Tm_2O_3 crystallite size was, the higher solubility percentage was. FTIR spectrum analysis showed that ultrafine Tm_2O_3 had higher surfaCe activity than that of polycrystal Tm_2O_3, the absorbance of Tm-O bond was blue-shifted, the absorbance intensity of Tm-O bond deereased.

关 键 词：超微粉末 沉淀法 氧化物 氧化铥 

分 类 号：O614.345[理学—无机化学]