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实验采用固相合成方法成功的制备了Ca3Co4O9热电材料。通过对不同烧成温度和时间的样品微观结构的分析研究,从而得到最佳的制备工艺。实验结果表明:二次研磨烧结有利于Ca3Co4O9片状组织的生长;900℃二次研磨烧结能够制备出较纯的Ca3Co4O9热电材料。 相似文献
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Synthesis of high-purity Ti2AlN ceramic by hot pressing 总被引:2,自引:0,他引:2
High-purity Ti2AIN ceramic was prepared at 1300℃ by hot pressing(HP) of Ti/Ai/TiN powders in stoichiometric proportion. The sintered product was characterized using X-ray diffraction(XRD) and MDI Jade 5.0 software (Materials Data Inc, Liverpool, CA). Scanning electron microscopy(SEM) and electron probe micro-analysis(EPMA) coupled with energy-dispersive spectroscopy(EDS) were utilized to investigate the morphology characteristics. The results show that Ti2AIN phase is well-developed with a close and lamellar structure. The grains are plate-like with the size of 3-5 μm, thickness of 8-10 μm and elongated dimension. The density of Ti2AlN is measured to be 4.22 g/cm^3, which reaches 97.9% of its theory value. The distribution of Ti2AlN grains is homogeneous. 相似文献