CaMnO3有效弹性性能研究

Scientific Bulletin of Valahia University Materials and Mechanics Pub Date : 2018-04-01 DOI:10.1515/bsmm-2018-0004

Prapawan Thongsri

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引用次数: 0

摘要

摘要采用固态反应(SSR)和热压(HP)法制备了氧化钙锰(CaMnO3)多晶。将CaCO3和MnO2粉末经球磨混合，850℃煅烧10 h, 850℃热压1 h，得到CaMnO3样品。用x射线衍射(XRD)分析了样品的晶体形貌。用扫描电镜(SEM)观察了样品的显微组织。结果表明，烧结工艺影响着CaMnO3的结晶完善程度，直接影响着CaMnO3的力学性能和时效行为。结果表明，CaMnO3的有效弹性模量为6 GPa，抗弯强度为0.417 MPa，符合高性能n型热电腿的要求。

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Study on Effective Elastic Properties of CaMnO3

Abstract Calcium manganese oxide (CaMnO3) polycrystalline was synthesized by solid state reaction (SSR) and hot-press (HP) methods. The powder of CaCO3 and MnO2 were mixed by ball milling then calcined at 850°C for 10 h and hotpressing at 850 °C for 1 h to obtain the CaMnO3 samples. The crystallography of the samples was analyzed by the X-ray diffraction (XRD). The microstructures of the samples were observed by scanning electron microscope (SEM). It was found that, the sintering process influence the crystalline perfection and have a direct impact on the mechanical properties of CaMnO3 and their aging behavior. The values of the effective elastic modulus was 6 GPa and Flexural strength was 0.417 MPa of CaMnO3 were found to be in the range of corresponding values for high performance and possibility fabricated n-type thermoelectric leg.

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来源期刊

Scientific Bulletin of Valahia University Materials and Mechanics

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审稿时长

4 weeks