钐对K_3PW_(12)O_(40)配合物气相扩渗的物相及导电性研究  

Study on phase relation and conductivity of K_(3)PW_(12)O_(40) treated by Sm chemistry-heated diffused permeation

作　　者：王蕴鹏[1] 周百斌[1] 刘永[1] 所艳华[1] 徐学勤[1] 

机构地区：[1]哈尔滨师范大学化学系,黑龙江哈尔滨150025

出　　处：《分子科学学报》2006年第6期372-375,共4页Journal of Molecular Science

基　　金：国家自然科学基金资助项目(20371014);黑龙江省教育厅科研基金资助项目(10531070);黑龙江省自然科学基金资助项目(ZTB2005-33);哈尔滨市学科后备带头人基金资助项目(2002AFXXJ050);黑龙江省高校骨干教师创新基金资助项目(1055G016)

摘　　要：采用气相扩渗的方法,对K3PW12O40.7H2O配合物进行稀土Sm的化学热扩渗.利用IR,XRD,TG-DTA和XPS等手段对扩渗后配合物的结构进行了表征和研究,发现在720℃下扩渗后的主要产物是β-W2N.XPS能谱分析证实了稀土的存在且与化合物有一定的键合作用.采用四极法对扩渗前后的试样进行了导电性能测试,扩渗后试样的导电性提高了3.1×104倍.分析了电阻、电导率与温度变化的关系曲线,发现此材料的导电性在672℃后电阻趋于0.Chemistry-heated diffused permeation is used to treat K3PW12O40· 7H2O with Sin. IR,XRD, TGDTA and XPS were used to characterize the permeated complex. The experimental results show that Sm can be permeated into the body of this sample,ehemieal bonds are formed between Sm and other components, and found that the main product isβ-W2N under 720 ℃. The conductivity was obtained by DC four-probe method and AC impedance spectra in the mean time. The conductivity of permeated sample is 3. 1×10^4 times of that of untreated one,and a PTC property was also found in the plot of relationship between conductivity and temperature,whieh gives a promising application for heteropoly complex.

关 键 词：杂多配合物 化学热扩渗 导电性 钐 

分 类 号：O614.6[理学—无机化学]