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Role of Catalysts in the Transformation of Germanium Dioxide
Author(s) -
KOTERA YOSHIHIDE,
YONEMURA MICHIKO
Publication year - 1969
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1969.tb13367.x
Subject(s) - germanium , germanate , alkali metal , catalysis , transformation (genetics) , perovskite (structure) , potassium , inorganic chemistry , lithium (medication) , salt (chemistry) , materials science , chemistry , chemical engineering , crystallography , organic chemistry , silicon , medicine , ion , biochemistry , gene , endocrinology , engineering
The role of some alkali compounds as catalysts in the polymorphic transformation of germanium dioxide was investigated by DTA and high‐temperature X‐ray diffraction. When a lithium or potassium salt is used, a solid state reaction first occurs between, the salt and germanium dioxide to form alkali germanate compounds which, in a crystalline or glassy state, catalyze the transformation. The effects of various catalysts on the transformation are discussed by comparing the activation energies.