Synergy Materials Research Center, National Institute of Advanced Industrial Science and Technology (AIST), 2268-1 Shimo-shidami, Moriyama-ku Nagoya 463-8687.

摘要

Microstructure and pore-size distribution of the porous CaZrO_3/MgO in situ composites were modified by the addition of SiC. A porous composite with bimodal pore-size distribution (peaks at approx 1/#mu#m and approx 17#mu#m, porosity V_p=59 percent) was obtained by the pressureless reactive sintering of CaMg(CO_3)_2 (dolomite), ZrO_2 and SiC mixtures with a small amount of LiF in air. In an oxidative sintering atmosphere, SiC presumably acted as a "precursor" of SiO_2 at elevated temperatures, and contributed to the "partial" liquid phase sintering in the powder compact.