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本研究通过真空烧结和热等静压两步烧结制备了一系列的镁铝尖晶石透明陶瓷.我们利用XRD对粉体和陶瓷的物相成分进行了实验分析,并发现配比为0≤χ≤0.20 的Mg_((1-3χ))Al_((2-2χ))O_4 粉体具有单一的尖晶石成分.SEM 观察发现陶瓷主晶相边界上有利于增韧陶瓷的氧化铝晶粒.通过氧化铝颗粒的透过率和增韧效果的综合考虑,在较小的光损失条件下,采用配比χ为1.4的Mg_((1-3χ))Al_((2-2χ))O_4 粉体制备的陶瓷的显微结构将会最有利于陶瓷的强韧化.

A series of transparent spinel ceramics were prepared by a two-step sintering process, vacuum sintering followed by hot isostatic pressing. Phase analysis of the powders and the ceramics were performed by X-ray Diffraction (XRD). The calcined Mg_((1-3χ))Al_((2-2χ))O_4 powders with 0≤χ≤0.20 are mono-phased spinel structure. SEM images show that corundum grains deposited on the main grain boundaries, which are beneficial for toughening the ceramics. Taking consideration of transparency and toughening effect of corundum, the microstructure of the ceramic prepared using Mg_((1-3χ))Al_((2-2χ))O_4 powder with χ of 0.14 is expected better for toughening and strengthening ceramic at less expense of transmittance.

参考文献

[1] Roy D M;Roy R;Osborn E F .The system MgO-Al_2O_3-H_2O and influence of carbonate and nitrate ions on the phase equilibria[J].Journal of the American Ceramic Society,1953,251:337-361.
[2] Roy D W .Hot-pressed MgAl_2O_4 for ultraviolet (UV),visible and infrared (IR) optical requirements[J].PROCEEDINGS OF THE SPIE,1981,297:13-18.
[3] Wang C T;Lin L S;Yang S J .Preparation of MgAl_2O_4 spinel powders via freeze drying of alkoxide precursors[J].Journal of the American Ceramic Society,1992,75:2240-2243.
[4] Tsai D S;Wang C T;Yang J et al.Hot isostatic pressing of MgAl_2O_4 spinel infrared windows[J].Materials and Manufacturing Processes,1994,9:709-719.
[5] Hing P .Fabrication of translucent magnesium aluminate spinel and its compatibility in sodium vapor[J].Journal of Materials Science,1976,11:1919-1926.
[6] Ting C J;Lu H Y .Hot-pressing of magnesium aluminate spinel.I[J].Acta Mater[J].,1999,47:817-830.
[7] Ting C J;Lu H Y .Hot-pressing of magnesium aluminate spinel.II[J].Acta Mater[J].,1999,47:831-840.
[8] Gilde G;Patel P;Paterson M .A comparison of hot-pressing,rate controlled sintering and microwave sintering of magnesium aluminate spinel[J].PROCEEDINGS OF THE SPIE,1999,94:3705-3708.
[9] Bailey J T;Russell R .Al_2O_3-TiO_2 system[J].Transactions Journal of the British Ceramic Society,1969,68(04):159-164.
[10] Shimada M;Endo T;Saito et al.Fabrication of transparent spinel polycrystalline materials[J].Materials Letters,1996,28:413-415.
[11] Sarkar R;Das S K;Banerjee G .Calcination effect on magnesium hydroxide and aluninium hydroxide for the development of magnesium aluminate spinel[J].Ceramics International,2000,26(01):25-28.
[12] Teoreanu I;Ciocea N .Magnesia-alumina spinel for refractories[J].Ceramics International,1987,4:19-21.
[13] Bailey J T;Russell R .Magnesia rich MgAl_2O_4 spinel[J].American Ceramic Society Bulletin,1971,50:493-496.
[14] Park H C;Lee Y B;Oh K D et al.Grain growth in sintered MgAl_2O_4 spinel[J].Journal of Materials Science,1997,16:1841-1844.
[15] Gentilman R L .Fusion-casting of transparent spinel[J].Journal of the American Ceramic Society,1981,60(09):906-909.
[16] Li H B;Wu D X;Lin L B .AlNH_4(SO_4)_2@12H_2O-MgSO_4@7H_2O system and the preparation of magnesium aluminate spinel powder[J].Journal of the Chinese Ceramic Society,1994,22(03):304-307.
[17] Garapan C;Manaa H;Moncorge R .Adsorption and fluorescence properties of chromium (3+) -doped nonstoichiometric green spinel[J].Journal of Chemical Physics,1991,95(08):5501-5512.
[18] Jing SY.;Huang NK.;Zhang J.;Lu Y.;Lin LB. .Investigation on lattice constants of Mg-Al spinels[J].Journal of Materials Science Letters,2000(3):225-227.
[19] Kostic J;Petkovic J;Merkovic V .The influence of the atmosphere on the reaction sintering in Al_2O_3-MgO system[J].Ceramurigia,1976,6(02):81-86.
[20] Alper A M.High Temperature oxide (Part Ⅳ)[M].New York and London:Academic Press,1970:77-80.
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