Thermoelectric Properties of Silver Antimonate with Mixed Valency of Antimony

• 作者: Hirofumi Kakemoto Hiroshi Irie Kensuke Ozawa
• 来源期刊: 材料科学与化学工程(英文)
• 学科: 工学
• 关键词: THERMOELECTRIC Material SILVER ANTIMONATE SEEBECK Coefficient Electrical CONDUCTIVITY Thermal CONDUCTIVITY
• 年，卷（期）: clkxyhxgcyw_2017,（1）
• 页码范围: 121-128
• 页数: 8页
• 分类号: TB3

摘要

Silver (Ag) and silver antimonate (AgSbO3) composites with different amounts of Sb3+ were synthesized by normal sintering with the aim of realizing a thermoelectric material. The electrical conductivity (σ) increased in the sample containing larger amount of Sb3+, whereas Seebeck coefficient (S) decreased. Producing Sb3+ caused the generation of oxygen vacancies in the material, and thus the corresponding donor levels are created in the bandgap, providing more conduction electrons. The conductive Ag particles would contribute to the conduction path as bypasses for carrier transport. The thermal conductivity (κ) was slightly lower in the presence of Ag defects in AgSbO3.