| 摘要 |
<p>A ceramic material having good thermal shock resistance consists of a matrix of zircon within which there is a dispersion of zirconia particles having a bimodal particle size distribution. The zirconia phases have mean particle sizes of (a) less than 4 micrometres, and (b) from 4 to 25 micrometres, each being 2 to 20 per cent (preferably 10 per cent) by weight of the material. The zirconia particles are admixed with particulate zircon; the mixture is then moulded and fired at 1400 to 1700oC. Alternatively, the finer particles of the mixture may be produced in situ by solid state reaction of alumina and dissociated zircon at firing. </p> |
