| Studies on Eutectic Liquid Sintering of
Zirconium Dioxide |
A. NAIK, G. N. AGRAWAL AND v. c. JOSHI
Pages : 130-133
DOI : 10.1080/0371750X.1981.10822534 |
| Abstract |
| Investigations were carried out on eutectic sintering of zirconium
dioxide powder (- 451- particle size, calcined at I000°C for 1 hour)
with tri-component eutectics. An intimate mixture of the eutectics
from the Ca0-AI20 3-Si02 and Mg0-AI,03-Si02 compositions was
prepared at 1350° and 1400°C respectively. It was then powdered and
sieved to - 45t< particle size. Pellets of ZrO. were prepared at 15
tons/inch sq with varying amount of eutectic mixtures (0.05% to
0.25% by weight), and sintered at temperatures 1150°, 1250°, 1350°
and 1450°C with different soaking periods ranging from 10 to 300
minutes. The data obtained were analysed using the empirical equa-
JL
tions (i) D = k log t + C and (ii) - = Ktn. The shrinkage data
Lo
were analysed to understand the mechanism of sintering. The study
revealed that ZrOa pellets of specified density and grain development
could be obtained by making a suitable choice of the additive and
varying its content. |
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