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纳米铬酸锶镧制备及烧结行为

Preparation and Sintering Behavior of Nano-scale La_1-xSr_xCrO₃ Powder

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【Author】 ZHAO Xin-ming~1,AO Qing~1,LI Sheng-li~1,SUN Liang-cheng~(1,2),LI De-hui~2 (1. College of Materials Science and Engineering,Shandong University,Ji′nan Shandong 250061,China; 2. Baotou Research Institute of Rare Earth,Baotou Inner Mongolia 014010,China)

【机构】山东大学材料科学与工程学院；包头稀土研究院山东济南250061；山东济南250061；山东济南250061包头稀土研究院；内蒙古包头014010；内蒙古包头014010；

【摘要】采用sol gel法制备了铬酸锶镧纳米粉体 ,并用纳米粉体制成了烧结体。利用XRD、TEM及SEM方法研究了不同条件下粉末样品的物相组成、形貌及烧结体的形貌。结果表明 ,随着锶掺杂量的增加 ,La1 xSrxCrO3(x =0～0 4 )粉料的粒径逐渐变小。随煅烧温度的增高 ,粒径逐渐增大 ,其最佳合成温度为 80 0℃。粘结剂加入量及成型压力对烧结体的气孔大小和分布影响很大更多还原

【Abstract】 La_1-xSr_xCrO₃ nanometer powder was prepared by sol-gel method. The crystal structure of the calcined powder and morphology of the sintered samples were characterized by X-ray diffraction（XRD） ,TEM and SEM. The results show that the partical-diameters decrease with the increase of Sr quantity,and increase with the synthesize temperature. The best sintered temperature is about 800℃. The influence of binder content and the molding pressure on the distribution and size of the pores in sintered samples is significant.更多还原