| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention relates to refractory materials and engineering ceramics and can be used in production of refractory ceramic articles, including industrial containers used during synthesis of high-purity materials based on niobiuim and tantalum pentaoxides, as well as for refractory lining of chemical apparatus, furnaces and structural elements. The refractory ceramic article has a base made from several flat blocks of quartz ceramic with moderate porosity, between which there are seams filled with solder of niobium or tantalum pentaoxide, and an outer coating of niobiuim or tantalum pentaoxide applied on the base. The edges of the blocks of the base are rounded and the corners of the blocks are smoothed. The solder in the seams has a double-tee cross-section with concave sides of the support. The width of the seam is not greater than twice the thickness of the block. The spherical radius of the edges of the blocks is not greater than half the thickness of the block. ^ EFFECT: increase in resistance of the refractory article to thermal shock by 14,6-34% during repeated use in heating-cooling mode, which increases the service life of the refractory article. ^ 2 cl, 2 ex, 2 dwg |
