棒状形貌三水碳酸镁晶体结晶动力学研究
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摘要
以MgCl_2·6H_2O与NH_4HCO_3为反应原料,采用低温液相法合成了棒状三水碳酸镁晶体,采用XRD,SEM对制备试样进行了测试表征,确定了棒状三水碳酸镁晶体的制备条件。在此基础上,分别采用Avrami方程和Nielsen方程,初步建立了棒状三水碳酸镁晶体的动力学模型
MgCl_2·6 H_2O and NH_4HCO_3 were adopted as the raw material,the bar shaped nesquehonite crystals were synthesized with low temperature liquid phase method. And the samples prepared were characterized by XRD,SEM to determine the preparation conditions of bar shaped nesquehonite crystal.On this basis,the dynamic model of rod like magnesium carbonate crystals was established by using Avrami equation and Nielsen equation.
MgCl_2·6 H_2O and NH_4HCO_3 were adopted as the raw material,the bar shaped nesquehonite crystals were synthesized with low temperature liquid phase method. And the samples prepared were characterized by XRD,SEM to determine the preparation conditions of bar shaped nesquehonite crystal.On this basis,the dynamic model of rod like magnesium carbonate crystals was established by using Avrami equation and Nielsen equation.
引文
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[11]Chen M,Li Y Y,Wang J D,et al.Preparation of magnesium carbonate whiskers by magmesite[J].Journal of the Chinese Ceramic Society,2009,37(10):1649-1653.
[12]Coleyshaw E E,Crump G,Griffith W P.Vibrational speetra of the hydrated carbonate mineralsikaite,monohydroealeite,lansforditeand nesquehonite[J].SPeetroehimiea Aeta Part A,2003,59:2231-2239.
[13]Avrami M.Kinetics of phase change I general theory[J].J.Chem.Phys.,1939(7):1103-1112.
[14]Avrami M.Kinetics of phase changeⅡtransformation time relation for random distribution of nucle[J].J.Chem.Phys.,1940(8):212-224.
[15]Avrami M.Granulation,phase change,and microstructure kinetics ofphase changeⅢ[J].J.Chem.Phys.,1941(9):117-184.
[16]Nielsen A E.Acta.Chem.Scand.,1959,13:784.
[17]Nielsen A E.Kinetics of precipitation[J].Pergamon,1964,15(6):1147-1153
[18]李小平,刘志宏,高世杨,等.硼酸溶液中氯柱硼镁石的溶解及相转化动力学[J].物理化学学报,2003,19(7):584-587.
[2]高玉娟,闫平科,王宇林,等.放射状三水碳酸镁晶体合成及生长机理研究[J].人工晶体学报,2014,43(4):886-892.
[3]Kloprogge J T,Martens W N,Nothdurft L,et al.Low temperature synthesis and characterization of nesquehonite[J].Journal of Materials Science,2003,22(11):825-829.
[4]闫平科,卢智强,高玉娟,等.束状三水碳酸镁晶体合成及动力学研究[J].人工晶体学报,2015,44(12):3606-3611.
[5]闫平科,白扬,孙得智,等.L-天门冬氨酸对三水碳酸镁晶体合成的影响研究[J].人工晶体学报,2017,46(9):1703-1708.
[6]三觜幸平,田辺克幸,田上直树.碱式碳酸镁及其制备方法和用途[P].国际:PCT/JP 2003/001437.2003-2-12.
[7]Yan X X,Li Y F,Xue D F,et al.Bonding analysis on the crystallization of magnesium carbonate hydrates[J].Journal of Synthetic Crystals,2007,36(5):991-999.
[8]Wang W P,Zhang Y.Preparation of magnesia whisker by the pyrolysls of magnesium carbonate[J].Journal of the Chinese Ceramic Society,2002,30(S1):93-95.
[9]Wang X L,Xue D F.Direct observation of the shape evolution of Mg O whiskers in a solution system[J].Materials Letters,2006,60(25-26):3160-3164.
[10]Shao P P,Mi J G.Composition and morphology of magnesium carbonate hydrates synthesized by the reaction of Mg SO4with Na2CO3in 283-363 K[J].The Chinese Journal of Process Engineering,2009,9(3):520-525.
[11]Chen M,Li Y Y,Wang J D,et al.Preparation of magnesium carbonate whiskers by magmesite[J].Journal of the Chinese Ceramic Society,2009,37(10):1649-1653.
[12]Coleyshaw E E,Crump G,Griffith W P.Vibrational speetra of the hydrated carbonate mineralsikaite,monohydroealeite,lansforditeand nesquehonite[J].SPeetroehimiea Aeta Part A,2003,59:2231-2239.
[13]Avrami M.Kinetics of phase change I general theory[J].J.Chem.Phys.,1939(7):1103-1112.
[14]Avrami M.Kinetics of phase changeⅡtransformation time relation for random distribution of nucle[J].J.Chem.Phys.,1940(8):212-224.
[15]Avrami M.Granulation,phase change,and microstructure kinetics ofphase changeⅢ[J].J.Chem.Phys.,1941(9):117-184.
[16]Nielsen A E.Acta.Chem.Scand.,1959,13:784.
[17]Nielsen A E.Kinetics of precipitation[J].Pergamon,1964,15(6):1147-1153
[18]李小平,刘志宏,高世杨,等.硼酸溶液中氯柱硼镁石的溶解及相转化动力学[J].物理化学学报,2003,19(7):584-587.