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张静文,张飞鹏,杨新宇,王盼,王翔,张久兴.胶体干燥工艺对制备CaMnO3粉末的影响[J].稀有金属材料与工程(英文),2018,47(10):3213~3217.[ZHANG Jingwen,ZHANG Feipeng,YANG Xinyu,WANG Pan,WANG Xiang and ZHANG Jiuxing.Effect of colloidal drying process on preparation of CaMnO3 powder[J].Rare Metal Materials and Engineering,2018,47(10):3213~3217.]
Effect of colloidal drying process on preparation of CaMnO3 powder
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Received:January 04, 2017  Revised:September 03, 2018
DOI:
Key words: CaMnO3 powder  sol gel method  characterization
Foundation item:国家自然科学(51572066)和第一届河南省自然科学基金(20160162)项目资助
Author NameAffiliation
ZHANG Jingwen,ZHANG Feipeng,YANG Xinyu,WANG Pan,WANG Xiang and ZHANG Jiuxing  
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Abstract:
      The gel was prepared by sol-gel method using metal nitrate as raw materials. All kinds of dry gel precursors were obtained under different drying conditions, then the CaMnO3 polycrystalline powders were obtained by calcinating the dry gel. This paper studies the effects of different drying processes on preparation of CaMnO3 powder, and the obtained powders were characterized by XRD, SEM, TEM and laser particle size analyzer. The results show that the continuous heating step for various drying temperatures is beneficial to obtain dry gel precursor with complete dehydration.The drying process of 90℃+120℃+140℃+160℃ is the best among the four processes. The CaMnO3 polycrystalline powder with good crystallinity, uniform particles and regular morphology was obtained after calcining the dry gel at 950℃, the CaMnO3 polycrystalline particles were composed by single-crystals with different orientations.