摘要
采用机械合金化(MA)结合热压烧结(HP)技术制备了n型Bi2Te2.85Se0.15热电材料,在常温下测量了电阻率(ρ)、塞贝克系数(α)和热导率(κ)等热电性能参数,考察了掺杂剂AgI的含量(质量百分比分别为0,0.1,0.2,0.3和0.4%)对材料热电性能的影响。结果表明:试样的电阻率和塞贝克系数的绝对值均随AgI掺杂量的提高而增大,热导率则随AgI掺杂量的提高而大幅降低,在AgI掺杂量为0.2%(质量)时有最大热电优值,为2.0×10-3/K。
The thermoelectric material of n type Bi2 Te2.82 Se0.12 was prepared by mechanical alloying （MA） method combined with hot-pressing （HP） technology,and the thermoelectric generating parameters were measured at nor mal temperature, such as resistivity（p）, seebeck coefficient （a） and thermal conductivity （k）. We investigated how the content of doping agent AgI 0,0.1,0. 2,0. 3,0. 4wt%, respectively, would affect the thermoelectric properties of the material. The result indicates： with the increasing of doping amount of AgI, the absolute value of resistivity and seebeck coefficient o{ test sample increased but heat conductivity reduced sharply, the maximum figure of merit is 2.0×10-3/K, it can be acquired when doping amount gets 0.2 wt%.
出处
《金属功能材料》
CAS
2012年第4期4-6,共3页
Metallic Functional Materials
