REFRACTORY SUPPORT FOR FIRING CERAMIC RADIO COMPONENTS AND METHOD OF MANUFACTURE THEREOF Russian patent published in 1997 - IPC

FIELD: refractory materials. SUBSTANCE: support consists of (i) a basis made from blend containing alumina, quartz sand, and material of broken alumina articles, and (ii) engobed coating made from suspensions based on polyvinyl alcohol aqueous solution with zirconate (selected from calcium, zirconium, and barium zirconates) powders and zirconium oxide powder. Blend is shaped and covered by spraying technique with preliminary layer of zirconium powder-based suspension. Preliminary layer is then covered by the same technique with working layer of engobed coating, which is fixed on the basis by means of high-temperature treatment when firing support. EFFECT: reduced cost, increased service life, and widened process capability of support with simultaneously increased insulating properties of coating. 2 cl, 3 tbl