| Development and Study of Zirco-mullite Ceramics |
B. L. MITRA, M. K. BANERJEE, N.c. BISWAS
AND P. S. AGGARWAL
Pages : 33-34
DOI :10.1080/0371750X.1985.10822728 |
| Abstract |
| Several compositions of zirco-mullite were prepared from ground
zircon sand and technical alumina. Different shapes like thermocouple
sheaths, pots, crucibles etc were fabricated and fired at temperatures
1500° and 1550°C, X-ray diffraction of the products sintered
at 1500°C showed the presence of mullite, monoclinic zirconia
and alpha alumina. The yttria containing batches developed tetragonal
zirconia. The modulus of rupture (water absorption 0-8.8 %) varied
between 566 and 1243 kg.cm-2. In the thermal shock resistance test,
from 1200"C to the ambient, all the test pieces survived through 15
cycles of quenching. Corrosion of the samples by borosilicate glass
after heat treatment at 1500°C was not evident by visual inspection. |
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