Microstructure examination and peak crystallization activation energy of MS-11A molybdenum sealing glass-ceramic
Differential thermal analysis was used to determine the crystallization characteristics of a molybdenum sealing glass-ceramic designated as MS-11A. This glass--ceramic's crystalline phase is zinc orthosilicate. By varying the heating rates from 2/sup 0/C/min to 40/sup 0/C/min, the initiation of crystallization, the peak crystallization temperature and the activation energy of crystallization were determined. Both annealed and unannealed glass-ceramic samples were evaluated; however, there was no significant difference between the results of these two parameters. The activation energy of crystallization was calculated at approximately 40 kcal/mole. The minimum temperature of crystallization was 790/sup 0/C at a rate of 2/sup 0/C/min and 930/sup 0/C for a rate of 40/sup 0/C/min. The microstructure of all DTA samples was examined. A typical structure consisted of submicron grains of crystalline Zn/sub 2/SiO/sub 4/ in a glass matrix.
- Research Organization:
- General Electric Co., St. Petersburg, FL (USA). Neutron Devices Dept.
- DOE Contract Number:
- AC04-76DP00656
- OSTI ID:
- 6592870
- Report Number(s):
- GEPP-TIS-533
- Country of Publication:
- United States
- Language:
- English
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