PHASE AND MORPHOLOGY OF PbNb2O6 OBTAINED BY MOLTEN SALT SYNTHESIS |
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| Authors: | TOSHIO KIMURA TAKASHI YAMAGUCHI R E NEWNHAM |
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| Affiliation: | 1. Faculty of Science and Technology , Keio University , Yokohama, 223, Japan;2. Materials Research Laboratory , Pennsylvania state university , University Park, PA, 16802 |
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| Abstract: | ABSTRACT The morphologic development of lead metanlobate powder particles in KC1 is examined with special emphases on the heating- conditions and starting compositions. Potassium ions are substituted in the Pb-x K2xNb206(PKN) With the Sthorhoobic modifications.The.morophology of particles changed during PKN formation and particle growth. During the formation process of PKN, equiaxed and rod-shaped particles were obtained both above and below the melting temperature of KC1. The rod-shaped particles have a columnar structure but decrease in number with Increasing potassium content in the starting mixtures. During the growth process, equiaxed particles grew to simple rod-shaped particles without a columnar structure. Potassium in the starting oxide was found to promote the formation of simple rod-shaped particles. PKN powder composed of only simple rod-shaped particles is obtainable. |
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