(中南大学 粉末冶金国家重点实验室，长沙 410083)
摘 要: 利用冷压—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；1
关键字: 10NiO-NiFe2O4复合陶瓷；BaO掺杂；惰性阳极；铝电解；致密化
（State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China）
Abstract: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 NiFe2O4 when content of BaO is in the range of 0−4%, BaO reacts with the component of 10NiO-NiFe2O4 ceramics and forms low melting point phase BaFe2O4 and Ba2Fe2O5, 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-NiFe2O4 composite ceramics sample basically has no change.
Key words: 10NiO-NiFe2O4 composite ceramics; BaO doping; inert anode; aluminum electrolysis; densification
