N型和P型Si_(80)Ge_(20)合金制备及热电性能  

Synthesis and properties of n-type and p-type Si_(80)Ge_(20) based thermoelectric materials

作　　者：毛斐[1] 吴振兴[1] 汤皎宁[1] 王涵[2] 刘正楷[2] 龚晓钟[2] 

机构地区：[1]深圳大学材料学院,深圳市特种功能材料重点实验室,广东深圳518060 [2]深圳大学化学与化工学院,深圳市功能高分子重点实验室,广东深圳518060

出　　处：《材料热处理学报》2013年第7期6-11,共6页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金资助项目(51171117);广东省科技计划项目(2006B14001001);深圳市科技计划项目(CXB200903090012A)

摘　　要：对N型Si80Ge20(P4)x及P型Si80Ge20Bx固溶体合金的化学计量比进行了研究,采用已总结出的最佳工艺条件,制备了一系列N型、P型固溶体合金,并比较了各系列样品的热电性能。结果表明,x=1.5的N型Si80Ge20(P4)x固溶体合金具备良好的热电性能,与未掺杂Si80Ge20固溶体合金相比,最高热电优值ZT为0.651,提高了3.34倍。x=1.5的P型Si80Ge20Bx固溶体合金也具备较佳的热电性能,最高热电优值(ZT)值为0.538。The stoichiometric ratio of N-type Si80Ge20（P4）x and P-type Si80Ge20Bx solid solution alloys were investigated.A series of N-type and P-type solid solution alloys were prepared under optimum doping conditions,and the thermoelectric properties of each series of samples were compared.The results indicate that the N-type Si80Ge20（P4）1.5 solid solution alloys have good thermoelectric properties when x=1.5.Significant improvement in ZT with a peak value about 0.651 at 500 ℃ in N-type Si80Ge20（P4）1.5 is obtained,which is 3.34 times than that of the undoped Si80Ge20 solid solution alloys.The P-type Si80Ge20B1.5 solid solution alloys also have good thermoelectric properties achieved the highest ZT of 0.538.

关 键 词：热电材料 Si80Ge20 粉末冶金 热电性能 

分 类 号：TB34[一般工业技术—材料科学与工程] O614.41[理学—无机化学]