銅ハース水平移動式アーク溶融法によるペロブスカイト型CeMO_3(M=Al, Ga)の合成, ミクロ組織及び結晶構造

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A large volume of the perovskite-type CeMO_3(M=Al, Ga)are synthesized by the arc-melting method with a horizontal-traveling hearth under Ar stream. The colour of the product for the M=Al is dark green. Evaporation of the raw materials is not observed. The single phase region of CeAlO_3 in volume of 〜3mm^3 is obtained. In the case of M=Ga, the product is light grey in colour. The arc-melting procedure resulted in a loss of the raw material of Ga_2O_3, hence CeO_2 is remained and distributed in the matrix of CeGaO_3. As a result, the single phase region of CeGaO_3 is not obtained. Both of CeAlO_3 and CeGaO_3 are crystallized in tetragonal structure(space group:P4/mmm)and number of molecules per unit cell, Z=1. The lattice parameters of a=0.37669(9)nm and c=0.37967(7)nm for CeAlO_3, and a=0.3873(1)nm, c=0.3880(1)nm for CeGaO_3, are obtained.
社団法人日本セラミックス協会の論文
1998-05-01