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benix新蟲 (初入文壇)
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[求助]
發(fā)現(xiàn)很多做陶瓷時候先壓再燒然后又磨了再壓和燒,為什么 已有1人參與
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看到這樣的過程,我覺得頗為蛋疼,好不容易壓好了高溫?zé)Y(jié)了竟然又磨細(xì)了重來,舉個例子: The β-CS powders were prepared by the chemical precipitated reaction of Ca(NO3)2·4H2O with Na2SiO3·9H2O. Briefly, 1000 ml of 0.4 mol Ca(NO3)2·4H2O solution was vigorously stirred at room temperature, and 1000 ml of 0.4 mol Na2SiO3·9H2O solution was added dropwise over 40~60 min to produce a white precipitate. After stirring for 12 h, the precipitate was filtered, and washed three times with distilled water followed by one-time wash with ethanol. The white precipitate was dried at 80 C overnight and calcined at 800 C for 2 h to obtain β-CS powders. Then, the obtained β-CS powders were uniaxially pressed into disks under a pressure of 10 MPa. Subsequently, they were sintered in air at 1070 C for 3 h. After sintering, the disks were triturated and sieved to obtain β-CS particulates with a size of 150~300 mm.——引自一篇2013年的biomaterials。 本科時候做過陶瓷,所以大致知道流程,但也不深入,所以希望解答(兩次壓燒之間有個磨,篩的過程,但是如果只是為了實現(xiàn)顆粒小,那么直接磨,篩也行。 |
銀蟲 (小有名氣)
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