新型氧化物(Ca_(0.85-x)Nd_xOH)_(1.16)CoO_2的水热合成及热电性能(英文)

Hydrothermal Synthesis and Thermoelectric Properties of New Oxides(Ca_(0.85-x)Nd_xOH)_(1.16)CoO_2

采用水热法制备了一系列具有片状形貌的(Ca0.85OH)1.16CoO2热电材料,并研究了Nd掺杂对该材料结构及热电性能的影响.结果表明,所制备的样品均为p型材料,在473K以下,材料的热电系数随着Nd含量的增加而增大;Nd掺杂后,材料的载流子浓度和载流子迁移率均发生变化,因此材料的电导率随着Nd含量的增加先增大后减小;在573K时,(Ca0.75Nd0.1OH)1.16CoO2材料的功率因子达到7.06×10-5W/(m·K2).

Plate-like particles of（Ca0.85OH）1.16CoO2 were prepared in which Nd was partially substituted for Ca to improve the thermoelectric performance.The values of Seebeck coefficient of as-synthesized oxides are all positive,showing that these oxides are p-type materials.The electrical conductivity initially decreases then increases with increasing Nd-doped amount,which is the coeffect of carrier concentration and carrier mobility.The Seebeck coefficient increases with the increasing Nd-doped amount below 473K.The power factor reaches 7.06×10^-5 W/（m·K^2） at 573K for（Ca0.75Nd0.1OH）1.16CoO2.