(中南大學(xué) 化學(xué)化工學(xué)院，長(zhǎng)沙 410083)
摘 要: 研究了超聲波對(duì)兩種不同結(jié)晶形態(tài)的四鉬酸銨結(jié)晶過(guò)程的影響，揭示了超聲波對(duì)鉬酸銨溶液結(jié)晶的晶型、熱化學(xué)性質(zhì)和晶體形貌的影響規(guī)律。研究表明，對(duì)于結(jié)晶速度較慢的反應(yīng)體系，超聲波的影響是非常顯著的。無(wú)超聲波作用下需24～48h制得產(chǎn)物，而在超聲波作用下只需10～20min即可完成。超聲波對(duì)結(jié)晶產(chǎn)物的晶體形貌均有顯著的影響， 無(wú)超聲作用下制得的樣品顆粒大而不均勻，超聲作用下制得的樣品顆粒細(xì)而均勻。
關(guān)鍵字: 超聲波；四鉬酸銨；晶型；晶體形貌
crystallization of ammonium
tetramolybdate
ZHANG Ping-min
（College of Chemistry and Chemical Eengineering，
Central South University，Changsha 410083，China）
Abstract:The crystalline，thermochemistry property and crystal appearance of ammonium tetramolybdate under ultrasonic were discussed. The results in dicate that the ultrasonic has a great effect on slow chemical reaction system. The crystallization time to the slow chemical reaction system is shortened from 24～48h to 10～20min underultrasonic and the crystal becomes more homogeneous under ultrasonic.
Key words: ultrasonic; ammonium tetramolybdate; crystalline; appearance of crystal
