Nano-Structural Alteration of Pyrophyllite by Grinding Revealed by X-Ray Diffraction and High-Resolution Transmission Electron Microscopy

Abstract:

The mechanical destruction of the pyrophyllite structure and final ground products upon grinding with a laboratory planetary ball mill were investigated using high-resolution transmission electron microscope (HRTEM) coupled with selected area electron diffraction (SAED), field emission scanning electron microscope (SEM) and X-ray diffraction (XRD). Grinding produced a profound structural alteration, resulting in increasing amorphization. Increasing the intensity of grinding resulted in acceleration of the mechanically induced amorphization of the pyrophyllite structure. The pyrophyllite phase was transformed into its anhydride phase during the process of the prolonged grinding. Increasing the grinding intensity resulted in faster destruction of the pyrophyllite structure. The plate-like microcrystal exhibited the 2M-pyrophyllite crystal structure. The pyrophyllite anhydride phase was existed after grinding.

• Periodical: Journal of Nano Research (Volume 40)
• Pages: 72-78
• DOI: https://doi.org/10.4028/www.scientific.net/JNanoR.40.72
• Online since: March 2016
• Authors: Jia Wei Sheng, Li Ping Zhang, Jun Yan, Qing Sun, Jian Zhang*
• Keywords: Ball Milling, HRTEM, Phase Transformation, Pyrophyllite, Structural Alteration

References

[1] F.G. Garcia, M.T.R. Abrio, M.G. Rodrigues, Effects of dry grinding on two kaolins of different degrees of crystallinity, Clay Miner. 26 (6) (1991) 549-565.

DOI: 10.1180/claymin.1991.026.4.09

[2] A. Bentayeb, M. Amouric, J. Olives, A. Dekayir, A. Nadiri, XRD and HRTEM characterization of pyrophyllite from Morocco and its possible applications, Appl. Clay Sci. 22 (2003) 211 – 221.

DOI: 10.1016/s0169-1317(03)00066-8

[3] P. J. Sanchez-Soto, M.C.J. Haro, L.A. Perez-Maqueda, I. Varona, J. L. Perez-Rodriguez, Effects of dry grinding on the tructural changes of kaolinite powders, J. Am. Ceram. Soc. 83 (9) (2000) 1649-1657.

DOI: 10.1111/j.1151-2916.2000.tb01444.x

[4] E.F. Aglietti, The effect of dry grinding on the structure of talc, Appl. Clay Sci. 9 (2) (1994) 139-147.

DOI: 10.1016/0169-1317(94)90033-7

[5] P.J. Sanchez-Soto, A. Wiewiora, M.A. Aviles, A. Justo, L.A. Perez-Maqueda, I. Varona, J.L. Perez-Rodriguez, P. Bylina, Talc from Puebla de Lillo, Spain. II. Effect of dry grinding on particle size and shape, Appl. Clay Sci. 12 (4) (1997) 297-312.

DOI: 10.1016/s0169-1317(97)00013-6

[6] J. Hrachova, P. Komadel, V.S. Fajnor, The effect of mechanical treatment on the structure of montmorillonite, Mater. Lett. 61(16) (2007) 3361-3365.

DOI: 10.1016/j.matlet.2006.11.063

[7] J.L. Perez-Rodriguez, M.S.D. Villar, P.J. Sanchez-Soto, Effects of dry grinding on pyrophyllite, Clay Miner. 23 (4) (1988) 399–410.

DOI: 10.1180/claymin.1988.023.4.07

[8] P.J. Sanchez-Soto, A. Justo, J.L. Perez-Rodriguez, Grinding effect on kaolinite–pyrophyllite-illite natural mixtures and its influence on mullite formation, J. Mater. Sci. 29(5) (1994) 1276-1283.

DOI: 10.1007/bf00975075

[9] M. Erdemoglu, M. Sarikaya, The effect of grinding on pyrophyllite flotation, Miner. Eng. 15 (10) (2002) 723-725.

[10] A. Wiewióra, P.J. Sánchez-Soto, M.A. Avilés, A. Justo, J.L. Pérez-Rodríguez, Effect of dry grinding and leaching on polytypic structure of pyrophyllite, Appl. Clay Sci. 8 (4) (1993) 261-282.

DOI: 10.1016/0169-1317(93)90008-o

[11] S. Mohammadnejad, J.L. Provis, J.S.J. van Deventer, Effects of grinding on the preg-robbing behaviour of pyrophyllite, Hydrometallurgy 146 (2014) 154-163.

DOI: 10.1016/j.hydromet.2014.04.007

[12] M. Hasegawa, M. Kimata, M. Shimane, T. Shoji, M. Tsuruta, The effect of liquid additives on dry ultrafine grinding of quartz, Powder Technol. 114 (2001) 145–151.

DOI: 10.1016/s0032-5910(00)00290-4

[13] J.L. Perez-Rodriguez, A. Wiewiora,V. Ramirez-Valle, A. Dura´n, L.A., Preparation of nano-pyrophyllite: Comparative study of sonication and grinding, J. Phys. Chem. Solids 68 (2007) 1225–1229.

DOI: 10.1016/j.jpcs.2007.01.007

[14] S. Milosevic, M. Tomasevic-Canovic, R. Dimitrijevic, M. Petrov, M. Djuricic, Amorphization of aluminosilicate minerals during micronization process, Am. Ceram. Soc. Bull. 71(5) (1997) 771-775.

[15] J. Temuujin, K. Okada, T.S. Jadambaa, K.J.D. MacKenzie, J. Amarsanaa, Effect of grinding on the leaching behaviour of pyrophyllite, J. Eur. Ceram. Soc. 23 (2003) 1277–1282.

DOI: 10.1016/s0955-2219(02)00297-2

[16] J. Hrachova, J. Madejova, P. Billik, P. Komadel, V.S. Fajnor, Dry grinding of Ca and octadecyltrimethylammonium montmorillonite, J. Colloid Interf. Sci. 316(2) (2007) 589-595.

DOI: 10.1016/j.jcis.2007.07.085

[17] J. Yan, J. Zhang, X.C. Hu, Determination of microstructure and defect structure in pyrophyllite by high-resolution transmission electron microscopy, Acta Mineral. Sinica. 32(1) (2012) 65-73.

[18] M.A. Kojdecki, J. Bastida, P. Pardo, P. Amoros, Crystalline microstructure of sepiolite influenced by grinding, J. Appl. Crystallogr. 38 (6) (2005) 888-899.

DOI: 10.1107/s0021889805026476

[19] G.W. Brindley, R. Wardle, Monoclinic and triclinic forms of pyrophyllite and pyrophyllite anhydride, Am. Mineral. 55(8) (1970) 1259-1263.

[20] C. Volzone, E.F. Aglietti, A.N. Scian, J.M. Porto López, Effect of induced structural modifications on the physicochemical behavior of bentonite, Appl. Clay Sci. 2(2) (1987) 97-104.

DOI: 10.1016/0169-1317(87)90001-9