EDTA络合法合成CSLNT陶瓷粉体

华中科技大学学报(自然科学版)(2004)

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Abstract
以乙二胺四乙酸 (EDTA)为络合剂 ,采用液相混合法合成 (1 -x)Ca0 .4Sm0 .4TiO3 -xLi0 .5Nd0 .5TiO3(CSLNT)陶瓷粉体 .探讨了溶液的 pH值对CSLNT粉体制备的影响 .采用XRD和SEM等技术来分析和表征由有机物前驱体得到的粉体 .当x =0 .3时 ,在空气中将CSLNT前驱体于 1 0 0 0℃预烧 3h可得到钙钛矿结构的CSLNT ,用此粉体制备的微波介质陶瓷在 1 2 5 0℃烧结 3h显示出优良的微波介电性能 :εr=98,Qf =6 5 0 0GHz ,τf=7.6× 1 0 -6/℃ .
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Key words
liquid mixing method,ethylenediaminetetraacetic acid(EDTA),microwave dielectric ceramics,ceramic powder
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