喷涂氧化铝粉体及其在等离子焰流下的变化  

SPUTTERED ALUMINA POWDER AND IT'S CHANGE IN PLASMA FLAME.

作　　者：罗玉长[1] 

机构地区：[1]山东铝业公司研究院,山东淄博255061

出　　处：《无机盐工业》2002年第2期3-4,13,共3页Inorganic Chemicals Industry

摘　　要：用烧结法生产喷涂氧化铝。试验采用水冷非转移式等离子喷枪 ,工作气体N2 、H2 ,其纯度 99 9%。稳定相α -Al2 O3 经等离子焰流熔融、淬冷后 ,转变为亚稳相γ -Al2 O3 ,经试验确定Al2 O3 的相变历程 :喷涂Al2 O3 粉体经等离子焰流熔融、淬冷 ,得γ -Al2 O3 ,经 80 0℃焙烧转变为δ -Al2 O3 ,再经 110 0℃热处理 ,转变为α-Al2The sputtered alumina was prepared by sintering process.In test the water cooling non-transference type plasma spray gun was used,the working gases were N 2,H 2,with purity of 99.9%.After melted by the plasma flame and quenched,the stabilizing phase α-Al 2O 3 is transformed to sub-stabilizing phase γ-Al 2O 3.The tests show that the procedure of the phase transfomation is as following: α-Al 2O 3 plasma flamemelted bodyquenchingγ-Al 2O 3800 ℃ δ-Al 2O 3 1 100 ℃α-Al 2O 3.

关 键 词：喷涂氧化铝粉体 等离子体 相变 球化低钠氧化铝 

分 类 号：TQ133.1[化学工程—无机化工]