镧掺杂对CdO－SnO_2系物相及性能的影响

Effect of La_2O_3 Doping on the Phase Constituents and Properties of the CdO-SnO_2 System

在ＣｄＯ－ＳｎＯ＿２体系中加入Ｌａ￣（３＋）可以提高学钛铁矿型β－ＣｄＳｎＯ＿３的热稳定性。通过对掺镧材料的物相及微结构的研究、认为Ｌａ￣（３＋）部分固溶到β－ＣｄＳｎＯ＿３品格中是提高其稳定性的主要原因。并可控制掺镧方式及热处理温度来合成不同相组成的气敏材料，改善ＣｄＯ－ＳｎＯ＿２系的气敏性能。

The phase constituents andmiceostructure of La_2O_3 doped CdO-SnO_2 systemhave been studied by means of X-ray diffraction(XRD)and transmission electron microscope(TEM).It appears that a small amount of La_2O_3added into the bulk of ilmente type β-CdSnO_3 canimprove its themal stability.The differnt phaseconstituents of gas-sensing materials can becontrolled by La_2O_3,doping and calcination temperature,which can improve the gas- sensingproperty of the CdO-SnO_2 system.