高温N_2气氛下树脂结合刚玉材料中阿隆相的形成机制  

Formation mechanism of AlON in resin bonded corundum materials under N_2-blowing at high temperature

作　　者：聂熙 李勇[1] 秦海霞[1] 闫明伟[1] 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)

机构地区：[1]北京科技大学材料科学与工程学院,北京100083

出　　处：《复合材料学报》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)

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.

关 键 词：电熔刚玉 烧结刚玉 碳热还原氮化 阿隆(AlON) 模型 

分 类 号：TQ175[化学工程—硅酸盐工业]