Reference

Thermodynamics of antimony, arsenic and copper in sodium carbonate slags at 1473 K

Thermodynamics of antimony, arsenic and copper in sodium carbonate slags at 1473 K. Kojo, Ilkka V.; Taskinen, Pekka; Lilius, Kaj (Inst. Process Metall., Helsinki Univ. Technol., Espoo SF-02150/15, Finland). Erzmetall, 37(1), 21-6 (English) 1984. CODEN: ERZMAK.There are some reagents with their cas registry numbers 15432-85-6 and 497-19-8 are used in this study. ISSN: 0044-2658. DOCUMENT TYPE: Journal CA Section: 54 (Extractive Metallurgy) Section cross-reference(s): 68 The equil. distribution of Sb and As between Na2CO3 melts and O-contg. Cu was investigated at 1473 K in CO2. Activity coeff. of the dissolved species was calcd. The soly. of Sb was higher than that of As in Cu melts contg. 0.01-1.0% O. Formation of Na3SbO4, NaSbO3, and Na3AsO4 was confirmed. .

Polycrystalline insulating material seals between spaced members such as a terminal pin and a ferrule

Polycrystalline insulating material seals between spaced members such as a terminal pin and a ferrule. Kyle, James C. (USA ). U.S. US 4421947 A 20 Dec 1983,15 pp. Cont. of U.S. Ser. No. 840,740, abandoned. (English). (United States of America). CODEN: USXXAM. CLASS: IC: H01B017-26; C03C027-02; C03C003-22. NCL: 174152000GM. APPLICATION: US 81-229151 28 Jan 1981. PRIORITY: US 77-840740 11 Oct 1977. DOCUMENT TYPE: Patent CA Section: 57 (Ceramics) Section cross-reference(s): 63 A polycryst. insulating material (contg. 32 different cryst. materials) for hermetic seals between Ti or a Ti alloy and a noble metal such as Pt, esp. as in pin-ferrule seals for heart pacemakers, is described. The seals are resistant to acids and alkalis and mech. and thermal shocks. The material consists of 2 fluxes having different m.p. and a stuffing material that contains ZnO and ZrO2. The latter oxides crystallize at the interface with one of the metals or alloys with an O valence bond being produced. The sealing material is more amorphous at the boundary with the noble metal. The seal is formed by progressive heating at least 2 times, each of which is insufficient to crystd. all of the material, with rapid cooling after each heating. The fluxes may contain PbO 68.5, B2O3 10.5, and SiO2 21.0 wt.% and 80 PbO and 20 wt.% B2O3. Other oxides, e.g., Na2O, TiO2, Li2O, and ZrO2 may be added. An example of a stuffing material, suitable for seals with Ti, contains SiO2 33.3, ZnO 33.3, CoO 10.0, ZrSiO4 15.0, and MoO3 5.0 wt.Except for chemicals metioned above, 15432-85-6 and 1317-36-8 are also used. parts. .