Alkali Bismuth Niobates, RbBi_2Nb_5O<16> and CsBi_2Nb_5O_<16> with a Pyrochlore Structure

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概要

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• A phase equilibrium study of the ternary system A_2O-Bi_2O_3-Nb_2O_5 (A=K, Rb or Cs) has been made. An extended range of a solid solution with the pyrochlore-type structure was found in the respective system. The composition of this new phase is described by a representative formula ABi_2Nb_5O_<16>, which exists mainly along a composition range BiNbO_4-ANb_1O_8. Phase diagrams of BiNbO_4-ANb_3O_8 systems with A=K, Rb and Cs were determined. Large single crystals of RbBi_2Nb_5O_<16> and CsBi_2Nb_5O_<16> were grown by the pulling method. They exhibit dielectric anomalies at 120-130 K.

• 社団法人応用物理学会の論文
• 1986-06-20

著者

• SUGAI Tokuko

  Research Institute Electrical Communication, Tohoku University

• Sugai Tokuko

  Research Institute Of Electrical Communication Tohoku University

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