| 单词 | starting powder |
| 释义 | > as lemmasstarting powder starting powder n. †(a) a combustible powder whose ignition begins a firework's display, before any explosion, emission of stars, etc. (obsolete); (b) Materials Science a powder used as the starting material in the synthesis of products (esp. ceramics) by sintering. ΘΚΠ the world > matter > light > firework > [noun] > parts of quill1629 report1653 red fire1680 cartouche1719 blue light1761 sun case1765 choke1786 settle1873 touchpaper1873 wheel-case1875 lance1878 starting powder1886 pastille1890 1886 Encycl. Brit. XX. 135/2 Such are the starting-powder, which first catches the fire, the bursting-powder, which causes the final explosion, and the quick-match (cotton-wick, dried after being saturated with a paste of gunpowder and starch). 1956 Vacuum 6 232 Deoxidation is preferably effected by adding fixed amounts of carbon to the starting powder. 1991 Sci. News 21 Dec. 414/1 The finer the starting powder, the finer the grain in the finished ceramic. 2009 Ceramic Engin. & Sci. Proc. 30 1 The starting powder is a mixture of commercially available alumina, yttria, and neodymia powders. < as lemmas |
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