ペロブスカイト型化合物RERh_3B_x(RE=La, Lu)の合成及びB不定比性, 硬度に関する研究

概要

論文の詳細を見る
Polycrystalline samples of LaRh_3B_x and LuRh_3B_x have been successfully synthesized by the arc melting method. Stoichiometric compositions of LaRh_3B and LuRh_3B have the perovskite-type cubic structure(space group Pm3m)and lattice parameter α=0.4251(1)nm and α=0.4126(1)nm, respectively. LaRh_3B has no nonstoichiometry of boron. On the other hand, perovskite-type LuRh_3B_x exists in the range of 0.3≨x≨1.000;the lattice parameter α of the perovskite-type cubic cell increases with increasing boron content x in the compound. The stoichiometric LaRh_3B and LuRh_3B have micro-Vickers hardness of 4.2(±0.1)GPa and 7.7(±0.5)GPa, respectively. The hardness of the LuRh_3B_x increases with increasing the B content.
社団法人日本セラミックス協会の論文
2000-07-01