Accession Number : ADP007743

Title :   Microwave Sintering of Zirconia 8 MOL % YTTRIA,

Corporate Author : OAK RIDGE NATIONAL LAB TN

Personal Author(s) : Janney, M. A. ; Calhoun, C. L. ; Kimrey, H. D.

Report Date : 27 APR 1992

Pagination or Media Count : 8

Abstract : Microwave sintering of zirconia - 8 mol % yttria in a 2.45 GHz microwave furnace is described. The nominal sintering temperature of the zirconia is 1375 deg C in the conventional furnace, but is only 1200 deg C in the microwave furnace. Difficulties were encountered in producing uncracked sintered parts in the microwave furnace because of the low thermal conductivity and rapid change in dielectric properties of the zirconia. An indirect heating method was developed to alleviate these problems and to make heating more uniform.

Descriptors :   *MICROWAVES, *SINTERING, *CERAMIC MATERIALS, *FIRING(CERAMICS), CONDUCTIVITY, DIELECTRIC PROPERTIES, DIELECTRICS, FURNACES, HEATING, TEMPERATURE, THERMAL CONDUCTIVITY, UNIFORMS, ZIRCONIUM ALLOYS, YTTRIUM, SYMPOSIA.

Subject Categories : Ceramics, Refractories and Glass
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE