摘要
以酚醛树脂为结合剂,分别以100wt%烧结刚玉细粉、100wt%电熔刚玉细粉和50wt%烧结刚玉加50wt%电熔刚玉混合细粉为原料制备试样,试样在N2气氛下经1 500℃和1 600℃烧成,对烧后试样进行XRD、SEM和EDAS表征分析。结果表明:1 500℃烧后试样中生成了γ-AlON(Al5O6N)和12H多型体(Al6O3N4),1 600℃烧后试样中生成了γ-AlON(Al5O6N)、21R多型体(Al7O3N5)和16H多型体(Al8O3N6)。1 600℃烧成试样中生成的阿隆(AlON)含量较1 500℃烧成试样显著增多。在相同温度下,50wt%烧结刚玉加50wt%电熔刚玉混合细粉试样中生成的AlON含量最多,100wt%电熔刚玉细粉试样次之,100%烧结刚玉细粉试样中生成的AlON含量最少。分析了AlON的形成机制并建立了刚玉细粉与碳的反应模型。
Using phenolic resin as binding agent,samples with sintered alumina(100 wt%),fused corundum(100 wt%)and sintered alumina(50 wt%)mixed with fused corundum(50 wt%)were prepared,respectively,then the samples were sintered at 1 500℃and 1 600℃ under flowing nitrogen,respectively.Sintered samples were characterized by XRD,SEM and EDAS.The results show thatγ-AlON(Al5 O6 N)and 12 Hpolytype(Al6 O3 N4)form in samples sintered at 1 500℃,whileγ-AlON(Al5 O6 N),21 Rpolytype(Al7 O3 N5)and 16 Hpolytype(Al8 O3 N6)form in samples sintered at 1 600℃.The content of AlON increases remarkably in samples sintered at 1 600℃compared with samples sintered at 1 500℃.At the same sintering temperature,AlON contents in samples prepared with sintered alumina(50 wt%)mixed with fused corundum(50 wt%),fused corundum(100 wt%)and sintered alumina(100 wt%)decrease inturn.The formation mechanism of AlON was studied and the reaction model of alumina powder and carbonis was presented.
作者
聂熙
李勇
秦海霞
闫明伟
姚桂生
金秀明
NIE Xi;LI Yong;QIN Haixia;YAN Mingwei;YAO Guisheng;JIN Xiuming(School of Material Science and Engineering, University of Science and Technology, Beijing 100083, China)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2018年第12期3393-3399,共7页
Acta Materiae Compositae Sinica
基金
水泥回转窑炉用MgO-Al2O3-FeOx高效低成本制备关键技术研发(BE2016043)
