Accession Number : ADD018486

Title :   Electrical Components Formed of Lanthanide Chalcogenides and Method of Preparation.

Descriptive Note : Patent, Filed 30 Jun 93, patented 17 Oct 95,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Novinson, Thomas

Report Date : 17 Oct 1995

Pagination or Media Count : 10

Abstract : Mixed metal chalcogenides formed of lanthanide chalcogenides having the formula MLnX sub 2 where M is selected from the group consisting of Ag, Cu and Au; Ln is one of the elements of the lanthanide family other than Pm and X is selected from the group consisting of S, Se and Te and having electrical properties that range from dielectrics to semiconductors to metallic conductors in a temperature range from -50 deg C. to in excess of +100 deg C. The lanthanide chalcogenides can he prepared by slow fusion of the basic elements such as silver, lanthanum and selenium, in substantially stoichiometric properties, in powder form under an extended time period at elevated temperature, e.g. 650 deg C. to 700 deg C.

Descriptors :   *LANTHANUM, *ELECTRICAL EQUIPMENT, *PATENTS, *CHALCOGENS, METALS, TEMPERATURE, HIGH TEMPERATURE, DIELECTRICS, SEMICONDUCTORS, ELECTRICAL PROPERTIES, COPPER, MIXING, SULFUR, GOLD, RARE EARTH ELEMENTS, TELLURIUM, SILVER, STOICHIOMETRY, ELECTRIC CONDUCTORS, SELENIUM

Subject Categories : Inorganic Chemistry
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE