作　　者： ; ; ; ;

机构地区： 中南大学材料科学与工程学院粉末冶金国家重点实验室

出　　处： 《中国有色金属学报》 2008年第5期851-855,共5页

摘　　要： 利用冷压一烧结技术制备BaO掺杂的10NiO-NiFe2O4复合陶瓷，研究BaO掺杂量及烧结温度对10NiO-NiFe2O4复合陶瓷物相组成、显微结构及致密度的影响。结果表明：当BaO掺杂量（质量分数）为0,-4％时，烧结样品中主要含NiO和NiFe2O4，BaO与10NiO-NiFe2O4陶瓷组分反应并形成瞬时液相BaFe2O4和Ba2Fe2O5，且Ba2＋固溶到基体中，促进致密化烧结，降低了烧结致密化温度；1250℃烧结时，1％BaO掺杂样品的相对密度最大，达到98．90％，比未掺杂样品的相对密度提高6．27％；但当BaO掺杂量为2％和4％时，陶瓷样品相对密度基本不变。 The BaO doped 10NiO-NiFe2O4 composite ceramics were prepared with the cold isostatic pressing-sintering process, the effects of BaO contents and sintering temperatures on the phase composition, microstructure and density of 10NiO-NiFe2O4 composite ceramics were studied. The results show that the samples are mainly consisted of NiO and NiFe204 when content of BaO is in the range of 0-4%, BaO reacts with the component of 10NiO-NiFe204 ceramics and forms low melting point phase BaFe204 and Ba2Fe205, and Ba2＋ dissolves into the ceramic base, which is important to accelerate the sintering densification and reduce densification temperature. When sintered at 1 250 ℃, the samples doped with 1% BaO have the maximum relative density 98.90%, which increases 6.27% compared with that of the undoped samples. However, when the BaO content is 2% and 4%, the relative density of 10NiO-NiFe204 composite ceramics sample basically has no change.

关 键 词： 复合陶瓷 掺杂 惰性阳极 铝电解 致密化

领　　域： [冶金工程]