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Infrared Spectra of Rapidly Quenched Glasses in the Systems Li 2 O‐RO‐Nb 2 O 5 (R=Ba, Ca, Mg)
Author(s) -
TATSUMISAGO MASAHIRO,
HAMADA AKIRA,
MINAMI TSUTOMU,
TANAKA MASAMI
Publication year - 1983
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.1151-2916.1983.tb09986.x
Subject(s) - natural bond orbital , ionic radius , octahedron , ion , crystallography , quenching (fluorescence) , crystallization , ionic bonding , infrared spectroscopy , materials science , radius , analytical chemistry (journal) , inorganic chemistry , mineralogy , chemistry , crystal structure , fluorescence , optics , molecule , physics , computer security , organic chemistry , chromatography , computer science
Twin‐roller quenching produced wide ranges of glass formation in the systems Li 2 O‐RO‐Nb 2 O 5 (R=Ba,Ca,Mg). The glass‐forming ability is improved with an increase in the ionic radius of R 2+ ions. The crystallization temperature is increased as Li 2 O is replaced by RO or the ionic radius of R 2+ ions is increased. Infrared spectra revealed that the glass LiNbO 3 (=50Li 2 O‐0Nb 2 O 5 ) was composed of six‐coordinated NbO 6 octahedra, which were joined together by corner‐sharing only. In the Li 2 O‐RO‐Nb 2 O 5 glasses there exist edge‐shared as well as corner‐shared NbO 6 octahedra. The edge‐shared NbO 6 octahedra in the glasses are increased with an increase in the content of RO or Nb 2 O 5 , and also with an increase in the ionic radius of R 2+ ions.