Accession Number : ADD014953

Title :   Silver Lined Ceramic Vessel and Method of Preparation.

Descriptive Note : Patent Application, Filed 10 May 91,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Ferrando, William A ; DiVecha, Amarnath P ; Kerr, James

Report Date : 10 May 1991

Pagination or Media Count : 9

Abstract : This invention relates to reaction vessels and more particularly high temperature reaction vessels having inert metal surfaces. Many of the component elements, oxides and nitrates used in synthesizing high temperature superconductor (HTS) compounds (and perhaps other classes of compounds) tend to react with most containment vessels during the high temperature processing required to form or sinter the materials. The noble metals are the only materials which remain essentially non-reactive under the required processing conditions. The noble metals (gold and silver) have been shown to protect the HTS compounds during thermal treatment and impart beneficial properties as additives. In achieving the purity of final HTS product necessary for high transport current, introduction of second phases during heat treatment must be minimized.

Descriptors :   ADDITIVES, CONTAINMENT(GENERAL), GOLD, HEAT TREATMENT, HIGH POWER, HIGH TEMPERATURE, INERT MATERIALS, MATERIALS, METALS, NITRATES, OXIDES, PHASE, POTENCY, PRECIOUS METALS, PREPARATION, PROCESSING, PURITY, RESPONSE, SILVER, SINTERING, SUPERCONDUCTORS, SURFACES, SYNTHESIS, TRANSPORT

Subject Categories : Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE