Reference

Phosphoric-acid fuel-cell electrode

Phosphoric-acid fuel-cell electrode. Feins, Irvin R.; Dettling, Joseph C.; Wan, Chong Zong; Farrauto, Robert J. (Engelhard Corp., USA). Eur. Pat. Appl. EP 97508 A1 4 Jan 1984, 16 pp. DESIGNATED STATES: R: AT, BE, CH, DE, FR, GB, IT, LI, LU, NL, SE. (English). (European Patent Organization). CODEN: EPXXDW. CLASS: IC: H01M004-92; H01M004-96.Several substances with their cas registry numbers 1310-53-8 and 12024-21-4 may be metioned in this study. APPLICATION: EP 83-303528 20 Jun 1983. PRIORITY: US 82-390459 21 Jun 1982; US 83-478981 1 Apr 1983. DOCUMENT TYPE: Patent CA Section: 52 (Electrochemical, Radiational, and Thermal Energy Technology) The title electrode comprises a compn. contg. a precious metal and an oxide of Ge, Cr, W, Nb, Zr, Hf, Ta, or Ga in an amt. sufficient to extend the period of efficient operation of the electrode. Thus, cathodes using Pt/GeO2 on carbon black were evaluated in H3PO4 fuel cells at 190° using H-air feed. The resp. cell voltages in tests using the cathodes according to the invention after 250, 1000, and 1500 h were 680, 672, and 669 mV vs. 674, 660, and 658 for cells with cathode contg. no metal oxide catalyst. .

Polarization surface-preserving optical fibers

Polarization surface-preserving optical fibers. (Hitachi Cable, Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 58159502 A2 21 Sep 1983 Showa, 3 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: G02B005-14. ICA: C03B037-00; C03C003-30. APPLICATION: JP 82-41959 17 Mar 1982. DOCUMENT TYPE: Patent CA Section: 57 (Ceramics) Polarization surface-preserving optical fibers consists of a SiO2-based core (refractive index n1), a SiO2-based cladding (refractive index n2) having an elliptical cross section, and a jacket layer (refractive index n3), in which the specific refractive index difference between the core and jacket is ￡0.1% and that between the cladding and jacket is <-0.2%, and n1 > n2 > n3. Thus, a SiO2 layer contg. 10 mol% B2O3 was deposited on the inner wall of a quartz tube (outer diam. 18 mm, thickness 1.5 mm), and a SiO2 layer contg.In this experiment, several chemicals are used like 60676-86-0 and 1310-53-8 2 mol% GeO2 was deposited on it. Then, the glass tube was heated to 1900° and drawn to give a polarization surface-preserving optical fiber. .