| 释义 |
preˈfire, v.
[pre- A. 1.]
trans. To fire (pottery, clay, etc.) beforehand, spec. before glazing. Hence preˈfired ppl. a., preˈfiring vbl. n.
1944E. Rosenthal Porcelain & Other Ceramic Insulating Materials I. viii. 203 Originally, pressed and other thin-walled articles were pre-fired at a temperature of between 800°–950°C. in order to give them the necessary mechanical strength so that they would not be deformed during the dipping process, but with the introduction of the aerograph for mass-production glazing pre-firing of the articles becomes superfluous. 1960W. D. Kingery Introd. Ceramics xiii. 428 The fine structure in the grog (prefired clay)..consists of fine mullite crystals in a siliceous matrix. 1961M. Francis tr. Salmang's Ceramics viii. 210 The grog should also be pre-fired at the temperature at which the brick will subsequently be used, so as to prevent the texture of the brick loosening owing to aftershrinkage of grog grains. 1965G. J. Williams Econ. Geol. N.Z. xx. 366/1 Some use has been made of these materials for refractories at Kamo, where the shrinkage is controlled by prefiring part of the mix. |