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物理学报. 1984, 33(10): 1427-1433.
doi: 10.7498/aps.33.1427.
Ba2CaWO6-Sr2CaWO6赝二元系的研究
- 收稿日期: 1983-09-23
- 刊出日期: 1984-05-05
摘要: 用差热分析、X射线物相分析和点阵常数的精确测定,研究了Ba2CaWO6-Sr2CaWO6赝二元系的相平衡和相变。发现在高温(860℃以上)时,形成连续固溶体。在室温时,在富Ba2CaWO6一侧,形成以Ba2CaWO6为基的固溶体;在富Sr2CaWO6一侧,形成以Sr2CaWO6为基的固溶体,相变点在成分为Ba2CaWO:Sr2CaWO6=25:75(克分子比)处。同时研究了作为高压钠灯灯丝涂层材料的BaxSr2-xCaWO6的几个重要性质:电子发射和多次启动时的灯压升高等。发现成分为BaSrCaWO6时,性质最好。
English Abstract
INVESTIGATION OF THE PSEUDO-BINARY SYSTEM Ba2CaWO6-Sr2CaWO6
- Received Date:
23 September 1983
- Published Online:
05 May 1984
Abstract: 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.
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