scispace - formally typeset
Search or ask a question

Showing papers on "Mixed oxide published in 1975"


Patent
12 Sep 1975
TL;DR: In this article, a solid vanadium (IV) phosphate having an improved intrinsic surface area is prepared by precipitating the solid from an essentially organic liquid medium at a temperature in the range 0° C to 200° C.
Abstract: A solid vanadium (IV) phosphate having an improved intrinsic surface area is prepared by precipitating the solid from an essentially organic liquid medium at a temperature in the range 0° C. to 200° C.

42 citations


Journal ArticleDOI
TL;DR: In this paper, the composition and stability of thin oxide films (?35 A), thermally grown on Pb-In alloy substrates at room temperature and various oxygen pressures, were studied quantitatively by Auger electron spectroscopy.
Abstract: The composition and stability of thin oxide films (?35 A), thermally grown on Pb–In alloy substrates at room temperature and various oxygen pressures, were studied quantitatively by Auger electron spectroscopy. The results indicate that all oxide films are enriched in indium in varying amounts, depending on the alloy composition and oxygen pressure. For alloys contaning more than 10 at.% In, the surface layer of the oxide consists of pure In2O3 only; for alloys of lower In concentrations a mixture of PbO and In2O3 is formed. The mixed oxide appears to be unstable since the Auger data monitored during vacuum storage are indicative of the reduction of PbO with attendant formation of additional In2O3 occuring near the alloy–oxide interface.

22 citations


Patent
01 Dec 1975
TL;DR: In this paper, a method of making mixed oxide especially UO 2 -PuO 2 nuclear fuel by impregnation is described, where the green pellets of nuclear fuel oxide are partially sintered, then impregnated with a second nuclear fuel dioxide, and then given a final and complete sintering step.
Abstract: A method of making mixed oxide especially UO 2 -PuO 2 nuclear fuel by impregnation wherein the green pellets of nuclear fuel oxide are partially sintered, then impregnated with a second nuclear fuel oxide, and then given a final and complete sintering step.

16 citations


Patent
Manabe Toshikatsu1, Masao Ohta1, Tetsuichi Kudo1, Mochizuki Shouji1, Gejyo Tetsuo1 
20 Jun 1975
TL;DR: In this paper, Nitric acid is added to an aqueous solution of organic acid salts of metals to be included in a resulting complex oxide powder, into which an inorganic salt of other metal component has been incorporated according to need.
Abstract: Nitric acid is added to an aqueous solution of organic acid salts of metals to be included in a resulting complex oxide powder, into which an aqueous solution of an inorganic salt of other metal component has been incorporated according to need, and the resulting solution is heated until the organic acid salts are decomposed and the decomposition product is heated, whereby a intended complex powder which is very fine and highly bulky and has a large specific surface area is obtained.

14 citations




Patent
05 Sep 1975
TL;DR: In this article, a method of reducing the electrostatic charge aquired by a plastic composition by incorporating therein an antistatically effective amount of a mixed oxide of phosphorus and one or more metals selected from the group consisting of silicon, aluminum, titanium and iron, having been prepared by flame hydrolysis; as well as the plastic composition containing said mixed oxide.
Abstract: A method of reducing the electrostatic charge aquired by a plastic composition by incorporating therein an antistatically effective amount of a mixed oxide of phosphorus and one or more metals selected from the group consisting of silicon, aluminum, titanium and iron, said mixed oxide having been prepared by flame hydrolysis; as well as the plastic composition containing said mixed oxide.

2 citations


Book ChapterDOI
H. Wise1
01 Jan 1975
TL;DR: In this article, the properties of some metal-oxide catalysts for ammonia, and for HC and CO will be discussed with special application to the auto-exhaust problem, with a focus on a dual-bed catalytic converter.
Abstract: Because of the problem of ammonia formation during the conversion of NOx by reaction with reducing gases in a dual bed catalytic converter the need has arisen for an NH3 oxidation catalyst of high N2-selectivity. Examination of a number of candidate systems has demonstrated that several metal-oxide catalysts are available that exhibit high N2-selectivity, activity, and stability in ammonia oxidation. However selective oxidation of NH3 to N2 runs counter to the complete oxidation of HC and CO. The properties of some oxidation catalysts for ammonia, and for HC and CO will be discussed with special application to the auto-exhaust problem.

2 citations


Journal Article
TL;DR: In this paper, the MICHAELIS-MENTEN equation was used to describe the catalytic depolymerization of paraldehyde by Si02-Zr02, Zr02-Ti02, AhOrZr 02, Ti02-XR02, A120 3- Ti02 catalysts and also by Mo03, W03, V 205 oxides supported on Si02 and AI20 3.
Abstract: The catalytic depolymerization of paraldehyde by Si02-Zr02, Zr02-Ti02, AhOrZr02, Ti02-Zr02, A120 3- Ti02 catalysts and also by Mo03 , W03 , V 205 oxides supported on Si02 and AI20 3 proceeds according to enzyme kinetics. The kinetic data with the above mixed oxides fit well the MICHAELIS-MENTEN's equation and hence the mechanism is considered similar to enzymatic reaction.