| 摘要 |
<p>In the procedure a substructure (4) is produced by modelling directly on a master model (1) to which has been applied a layer of distance material (2) and a layer of separation material (3). After drying of the master model (1) with applied substructure material for one minute at 80 °C the substructure material (4) can be removed from the master model (1) as an independent substructure, which is heat treated first by heating to 500 °C for at most 10 minutes, whereby the bonding agent is removed, and thereafter by heating to 1120 °C for 2 hours, whereby the material is sintered. After cooling the substructure (4) is checked on the master model (1), whereafter a layer of glass is applied and thereafter heated to 1100 °C for 2-4 hours whereby an infiltration of glass in the substructure material takes place. After removal of the excess glass a ceramic can be applied in the known manner. The separation material (2) consists of a mixture of completely combustible plasticine and chloroform in a mixing ratio enabling the material to be applied with a brush at 22 °C, but to harden at approx. 20 °C. The substructure material (4) consists of demineralised water, cellulose powder, sugar and oxide ceramic.</p> |
