摘要
制备了一系列非化学计量比镁铝尖晶石粉体及透明陶瓷(MgO.nAl2O3,n=1,1.5,2,4),研究了n值对粉体物相的影响以及n值与陶瓷中波红外透过率、抗弯强度的关系。n值为1.5、2、4时,MgO.nAl2O3粉体仍可保持纯尖晶石相。MgO.1.5Al2O3透明陶瓷在具备与计量比镁铝尖晶石透明陶瓷(MgAl2O4,即MgO.Al2O3)相当的优良中波红外透过率的同时,抗弯强度从152 MPa提高至215 MPa,提高幅度达41%。力学性能的提升有利于镁铝尖晶石透明陶瓷的应用。
A series of non-stoichiometric magnesia-alumina spinel powder and transparent ceramics were prepared（MgO · nAl2O3, n = 1, 1.5, 2, 4）. The effect of ＂n＂ on the powder phase, optical property and flexural strength of transparent ceramics were investigated in this paper. When n = 1.5, 2, 4, MgO · nAl2O3 powder are in pure spinel phase. The flexural strength of MgO · 1.5 Al2O3 is improved greatly from 152 MPa（MgO · Al2O3） to 215 MPa（MgO · 1.5 Al2O3） by a growth rate of 41%, Mid-IR transmittance of MgO · 1.5 Al2O3 and stoichiometrie magnesia-alumia spinel （ MgA1204, MgOoAl2O3 ） are matched also. The improvement of flexural strength is advantageous to the application of magnesia-alumia spinel transparent ceramics.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2011年第4期891-894,共4页
Bulletin of the Chinese Ceramic Society
关键词
镁铝尖晶石
透明陶瓷
非化学计量比
中波红外
抗弯强度
magnesia-alumina spinel
transparent ceramics
non-stoichiometric
mid-IR
flexural strength
