湿法制备高纯碲化镉粉末  

Preparation of High Purity CdTe Powder by Hydrometallurgical Method

作　　者：邹发夔 王海北 范艳青 刘巍 ZOU Fa-kui;WANG Hai-bei;FAN Yan-qing;LIU Wei(Beijing General Research Institute of Mining and Metallurgy,Beijing 100160,China;BGRIMM Technology Group,Beijing 100160,China)

机构地区：[1]北京矿冶研究总院,北京100160 [2]矿冶科技集团有限公司,北京100160

出　　处：《有色金属（冶炼部分）》2023年第4期89-95,共7页Nonferrous Metals（Extractive Metallurgy)

基　　金：矿冶科技集团有限公司科研基金重点项目(02-2004)。

摘　　要：以高纯CdCl_(2)、TeO_(2)为原料,(NH_(4))2CO_(3)为沉淀剂,采用共沉淀氢还原的方法制备出碲化镉粉末。结合XRD、SEM、TG等研究手段分析上述过程发生的物相转变和微观结构变化。结合相关化学反应热力学数据,对氢化过程发生的化学反应进行理论分析。结果表明,当CdCl_(2)和TeO_(2)以摩尔比1∶1进行混合得到的碲镉共沉物,Cd^(2+)以1~2μm的CdCO_(3)的形式在TeO_(2)的表面沉淀析出;在500℃氢氩混合气(10%H_(2)+90%Ar)气氛下,成功还原出单一相组成的碲化镉粉末。CdTe powder was prepared by co-precipitation and hydrogen reduction method applying high purity CdCl 2 and TeO_(2) as raw materials and(NH_(4))2CO_(3) as precipitant.The phase transformation and microstructure change during the above process were analyzed by means of XRD,SEM,TG and other research methods.Based on the thermodynamic data of chemical reactions,the chemical reactions occurred in hydrogenation process were theoretically analyzed.The results show that when CdCl_(2) and TeO_(2) are mixed at a molar ratio of 1∶1,the Cd and Te co-precipitation product is obtained.Cd^(2+)precipitates on the surface of TeO_(2) in the form of CdCO_(3) with a size of 1~2μm.The CdTe powder composed of single phase is successfully reduced under the atmosphere of hydrogen argon mixture(10%H_(2)+90%Ar)at 500℃.

关 键 词：碲化镉 共沉淀 氢还原 形貌控制 

分 类 号：TB34[一般工业技术—材料科学与工程]