The Preparation of Cu - doped Ca3Co4O9 Thermoelectric Materials

1st International Conference on Frontiers of Materials Synthesis and Processing

材料科学;化学

Luo, Jiaolian^1,2 ; Tang, Peng^1 ; Chen, Ruxue^1

Special and Key Laboratory of Guizhou Provincial Higher Education for Green Energy-Saving Materials, Guiyang

550025, China^1

School of Materials Science and Engineering, Guizhou Minzu University, Guiyang

550025, China^2

关键词: Crystallinities;    Diffraction intensity;    Muffle furnaces;    Sintering temperatures;    Solid-phase preparation;    Stoichiometric ratio;    Temperature setting;    Thermo-Electric materials;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/274/1/012153/pdf
DOI  :  10.1088/1757-899X/274/1/012153

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this paper, CaCO3, CoO, CuO as raw materials, using solid phase preparation of Ca3Co4O9-based thermoelectric materials doping Cu. The Ca3Co4O9-based thermoelectric material intermediates were prepared according to the stoichiometric ratio x=0.01, and the sintered crystals were prepared by using muffle furnace under different temperature setting conditions. X-ray diffraction (XRD) and Scanning electron microscopy (SEM) were used to analyze the crystallinity and morphology of the samples after sintering. The results show that the crystallinity of Ca3Co4O9-based thermoelectric materials is best when sintered at 800-850°C, and the crystallinity of samples sintered at 850°C is better than that at 800°C, The diffraction intensity ratio is stronger than 800°C. Continue to raise the temperature, Ca3Co4O9-based thermoelectric materials phase transition to Ca3Co2O6-based thermoelectric materials, When the sintering temperature is 1000°C, the product is Cu-doped Ca3Co2O6-based thermoelectric materials.