PREPARING ZIRCONIUM DIBORIDE DIRECTLY FROM ZIRCON
Technical Report
·
OSTI ID:4015000
The synthesis is based on the reaction 2ZrO/sub 2/. SiO/sub 2/ + B/sub 4/C + 5C -- 2ZrB/sub 2/ + 2SiO + 6C0. Charges consisted of 76% zircon, 13% B/sub 4/C, and 11% lampblack. The optimum conditions for synthesis were determined by heating at 1200 to 1700 deg C, under a starting vacuum of 50 mu for 10 min to 12 hr. The reaction began at 1350 plus or minus 25 deg C and continued when the application of heat was discontinued. The quality of the product was found comparable to commercially produced ZrB/sub 2/. The quantities of residual carbon and SiO/sub 2/ are not excessively high, but refinements in procedure may lower the amounts. (B.O.G.)
- Research Organization:
- Bureau of Mines. Norris Research Lab., Norris, Tenn.
- NSA Number:
- NSA-15-018481
- OSTI ID:
- 4015000
- Report Number(s):
- BM-RI-5770
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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