The B-site ion ordering parametrers (S)and elements mapping image of Ba(Mg_(1/3) Ta_(2/3))O_3(BMT) ceramic prepared by different starting materials have been investigated by means of XRD,EPMA, SEM analysis, The microwave properties at X band have also been discussed. 本工作用XRD,EPMA,SEM等测试技术计算和示出了用不同活性粉料制备的Ba(Mg_(1/3)Ta_(2/3))O_3微波陶瓷晶格中B位离子有序度和元素的面分布情况,对它们在X波段下的介电行为作了探讨。
Experimental studies have been carried out on the effects of raw material preparation and hot-pressed conditions on the density, microstructure and
综述了铁氧体粉料的新型制备方法的原理和主要工艺过程,包括自蔓延高温合成法、低温燃烧合成法、机械化学合成法、水热法、冷冻干燥法和超
探讨了在常压下,以轻烧白云石粉料为原料采用二次碳化法制备碱式碳酸镁的反应机理,确定最优工艺条件。
结果表明,在一二次碳化pH值停止点pH1=10、pH2=9,一、二次碳化CO2分压为PCO2 1=0.03MPa、PCO2 2=0.1MPa、碳化液浓度25g/L、搅拌速度400r/min的条件下,制备出长度为60μm左右、截面直径为2μm左右的棒状碱式碳酸镁,其氧化镁含量为42%,氧化钙含量为0.07%,白度为97.3%。