Accession Number : AD0163801

Title :   Preparation of Ultrafine Mixed Metallic-Oxide Powders.

Descriptive Note : Patent,

Corporate Author : OFFICE OF THE SECRETARY OF THE ARMY WASHINGTON D C

Personal Author(s) : Messier,Donald R. ; Gazza,George E.

Report Date : 01 AUG 1972

Pagination or Media Count : 2

Abstract : The patent describes a method for the preparation of ultrafine mixed metallic-oxide powders comprising the steps of: comelting stoichiometric amounts of hydrated nitrates of at least two cations, freezing the melt to produce an intimate mixture of the solid hydrated nitrates, partially dehydrating the solid mixture at a subliquidus temperatures and heating the dehydrated mixture in order to drive off the nitrogen and decompose the mixture to the oxide.

Descriptors :   (*ALUMINATES, SYNTHESIS(CHEMISTRY)), (*MAGNESIUM COMPOUNDS, SYNTHESIS(CHEMISTRY)), (*YTTRIUM COMPOUNDS, SYNTHESIS(CHEMISTRY)), (*SPINEL, SYNTHESIS(CHEMISTRY)), (*ALUMINATES, *PATENTS), CHEMICAL PRECIPITATION, NITRATES, PARTICLE SIZE, CRYOGENICS

Subject Categories : Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE