Open AccessINVESTIGATION OF THE PSEUDO-BINARY SYSTEM Ba2CaWO6-Sr2CaWO6
Author(s) -
Fu Zhengmin,
Wenxiu Li,
Xu Pan-Xiang,
Zhan Jing-Zi,
Qi Xiao-Zhen
Publication year - 1984
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.33.1427
Subject(s) - solid solution , materials science , binary number , diffraction , phase transition , analytical chemistry (journal) , voltage , thermodynamics , optics , physics , chemistry , arithmetic , mathematics , chromatography , quantum mechanics , metallurgy
The phase equilibrium and transition in the pseudo-binary system Ba2CaWO6-Sr2CaWO6 have been investigated by means of DTA, X-ray powder diffraction, precise measurement of lattice parameters and other methods. A continuous solid solution was formed at high temperatures (above 860℃). At room temperature, a solid solution based on the structure of Ba2CaWO6 was formed on Ba2CaWO6-rich side and a solid solution with the structure of Sr2CaWO6 on Sr2CaWO6-rich side and a phase transition point was found at 25mol. per-cent of Ba2CaWO6.As a coating material for the filaments of high voltage sodium lamp, the important characters of BaxSr2-xCaWO6, the electron emission and the rise of the lamp voltage during multiswiching, were investigated. The best performance was found at the composition of BaSrCaWO6.