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Electrolytic Preparation of Titanium and Zirconium Diborides from Their Oxides and Mineral Concentrates.

Authors
Gomes-JM; Uchida-K; Wong-MM
Source
NTIS: PB 245 561 :14 pages
Link
NIOSHTIC No.
10007633
Abstract
The Bureau of Mines investigated electrolytic techniques for preparing diborides of the group IVB metals. Tib2, zrb2, and hfb2 were electrodeposited from their respective oxides dissolved in borate-chloride-cryolite electrolytes. Titanium diboride was also electrodeposited from rutile (tio2) dissolved in a na2b4o7-na2co3- na3alf6-nacl electrolyte at 1,050 deg c; 14 kw-hr were required to produce 1 pound of tib2. Major impurities in the tib2 produced in a 10-deposition cycle experiment, in weight-percent, were a1, 0.2; Cr, 0.3; Fe, 0.1; V, 0.3; C, 1.4; and o, 1.0. Zirconium diboride was electrodeposited from zircon (zrsio4) dissolved in a na2b4o7-naoh- na3alf6xdacl-naf electrolyte at 1,050 deg c. The zrb2 produced in a 10-deposition cycle experiment contained the following impurities in weight-percent: fe, 0.1; Si, 0.5; C, 0.3; and o, 0.6. Energy required to produce 1 pound of zrb2 was 9.3 Kw-hr.
Publication Date
19750101
Document Type
IH; Report of Investigation;
Fiscal Year
1975
NTIS Accession No.
PB-245561
NTIS Price
A03
Identifying No.
RI 8053
NIOSH Division
RERC;
Source Name
NTIS: PB 245 561
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