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1、Al2O3 ( L 3 5 *苗赫濯(b v S , 100084)Main Problems and Solutions for the Production of Alumina CeramicsMIAO Henullzhuo( State Key Laboratory of New Cer amics and Fine Processing, Tsinghua University , Beijing 100084, China)Abstract: null The problems and solutions for the production of alumina ceramics
2、 were reviewed. The emphasis was paid on the raw materinullals preparation, composition, mixing, forming and sintering of alumina ceramics. The trends on research and development were proposed.null null Keywords: null Alumina ceramics; Process; Raw materials preparation; Forming; SinteringK null 1 :
3、 null Al2O3( L 3 5 , + Y S = Al2O3( L ! a a Z 3 f ? _ , H 4 1 - A E bnull null 1 o M : null Al2O3 ( L ; 3 ; ! ; ; null null m s | :TB756null null D S M : Anull null c I | : 1002null8935( 2002) 03null0001null05l : 2002null05null11* null 0 ( L # b 0 99. 99 99. 99 99. 99 99. 99 99. 99 99. 990.004 0. 00
4、3 0. 002 0.001 0. 004 d , FMgOnullSiO2 Al2O3 L , l , , , 1650 b Al2O3nullSiO2nullCaOnullMgO 8 , ,7 O l , , z ? b , 95% Al2O3 L , MgO, CaO9 F M H , MgO/ CaO z ? , 7 MgO/ CaO 1 M H , MgO z ? , MgO ,E Al2O3 s v , MgO c v 3% , Q 7 ? ( b V 5 9 T , Al2O3nullSiO2nullCaO 8 F F MgO, F F 0. 9%H r T K z , 0. 9
5、%H3 U F , s Yv 7 O ( , g d ; F V V 0.9%H , r T 9 z , MgO V A M , MgAl2O4 A 8 , 9 v A M T ,E , ? , d q 6 , ? / b99% Al2O3 ( L F 4 , 1 L % M L C , 7 . V L 8 b V ,V F F 4 , MgO,TiO2, La2O3, Y2O3, Cr2O3 T B Al2O3 ( L 4 bMgO K B 4 , 1959M S R.L. Coble MgO P B Al2O3( L d i bB MgO Al2O3 / Q , h U F M / , y
6、 Al2O3x L 8 d # , HAl2O3 v , 7 Al2O3 R W d # d , $ v Al2O3 U = d , 7 MgO!Al2O3( h U F ) C , 5 V E Al2O3 v , P d s H W d b MgO 1 ? , V = ( bZnO, NiO 9 ? Al2O3 V s 9 v , 7 O MgO* ? bTiO2, Cr2O3, Fe2O3,Mn2O3 F 4 , Al2O3 1 , ? Al2O3 3 % 8 ,9 F J , , bTiO2 Al2O3 ( L F 4 , y Ti4+ Al3+ 0 1 , M l 15%, ? % 8
7、 , r N | 3 J b J Z T / :3TiO2 2Al2O3 3Ti!Al+ 6OO+ VnullAl( Al 0 b )Al2O3 2TiO3 2AlTi+ 3OO+ V%O( 0 b )b 3 ,9 F 0 q , b V , Al2O3 F 0. 5%1. 0% TiO2, V P 100 150 bL ,TiO2 r z T , r L 8 ? , R T L F4 b B F 4 ? , y L 8= A M , W d 4 s A , b H ? 9 / ,y 3 J ,9 F 0 ,A 9 F f ,V7 E 9 F bLa2O3,Y2O3, Sm2O3 B t r V a i h l b 6 B Al2O3 , 95% Al2O3 Z $ F 0. 5% 0. 7% La2O3 Sm2O3,? P 30 P , h l 7 O ( b3null 5 B Y ( L 3 4 5 B b( L Z E V Y s E A E v b A E ( L ( L ( , )F 8 ,y N A E 9 V bV 2 B s n Z E bm 1 null
