Reference

Manufacturing method of high temperature superconductor of yttrium system

Manufacturing method of high temperature superconductor of yttrium system. Lee, Eun Hong (Samsung Electro-Mechanics Co., Ltd, S. Korea). Repub. Korea KR 144727 B1 17 Aug 1998, No pp. given (Korean). (Korea, Republic Of). CODEN: KRXXFC. CLASS: ICM: H01B012-00. APPLICATION: KR 1989-19404 23 Dec 1989. DOCUMENT TYPE: Patent CA Section: 76 (Electric Phenomena) A method for fabricating an yttrium based super cond. is provided to improve a crit. transfer temp. and a crit. c.d. by adding NaNO3 to Y2O3, BaCO3 and CuO compd. 7631-99-4 and 513-77-9 which are cas registry numbers are also used here. A compd. including Y2O3, BaCO3 and CuO in the mole ratio of 1 : 4 : 6 was used to manuf. an yttrium based super cond. A predetd. amt. of NaNO3 is added to the compd. Then, the compd. is dried and in the atm. at 890-950° for ~20-30 h. The NaNO3 is added to the compd. in the ratio of 0.5 to 4.5 wt. % so that a crit. c.d. is continuously increased. .

Gold-base catalysts supported on carbonate for low-temperature CO oxidation

Gold-base catalysts supported on carbonate for low-temperature CO oxidation. Lian, Honglei; Jia, Mingjun; Pan, Weicheng; Li, Yong; Zhang, Wenxiang; Jiang, Dazhen (College of Chemistry, Jilin University, Changchun 130023, Peop. Rep. China). Catalysis Communications, 6(1), 47-51 (English) 2005 Elsevier B.V. CODEN: CCAOAC. ISSN: 1566-7367. DOCUMENT TYPE: Journal CA Section: 67 (Catalysis, Reaction Kinetics, and Inorganic Reaction Mechanisms) Section cross-reference(s): 59 Au/MeCO3 (Me = Ca, Sr, Ba) catalysts prepd. by co-pptn. method were studied for low-temp. CO oxidn. 471-34-1 and 513-77-9 which are cas registry numbers are also used here. in the presence/absence of water in the feed stream. The type of support and the calcination temps. have considerable effect on the activity of the catalysts. Among them, Au/BaCO3 calcined at 473 K shows the highest activity, full conversion of CO can be obtained at ambient reaction temp. in the presence of moisture. The addn. of water vapor in feed stream has pos. influence on the activity of Au/MeCO3 catalysts for CO oxidn., which might be due to water can participate CO oxidn. reaction directly. .