Article
Electron and light microscopy studies on the domain structures of Zn 3B7O13Cl, Zn3B7O 13Br and Zn3B7O13I ferroic boracites
Fecha
1993Registro en:
10.1046/j.1365-2818.2002.01077.x
Autor
Nuno-Donlucas, S.
Rhoton, A.I.
Corona-Galvan, S.
Puig, J.E.
Kaler, E.W.
Institución
Resumen
Poly(styrene-co-sodium acrylate) has been synthesized by emulsion polymerization of styrene and sodium acrylate at a ratio of 9:1 with the water-soluble initiator potassium persulfate. The reaction is fast, conversions are high, and the evolution of particle size follows the conversion curve. The final latex is stable and contains spherical particles 70 nm in diameter. The presence of the copolymer is confirmed by several methods including FTIR, and the copolymer evolves from rich in sodium acrylate to rich in styrene as the reaction proceeds. " 1993 Springer-Verlag.",,,,,,"10.1007/BF00296851",,,"http://hdl.handle.net/20.500.12104/41219","http://www.scopus.com/inward/record.url?eid=2-s2.0-0001123646&partnerID=40&md5=3def5991a6590b5c5368988837197fc2",,,,,,"2",,"Polymer Bulletin",,"207 214",,"30",,"Scopus WOS",,,,,,,,,,,,"Emulsion copolymerization of styrene and sodium acrylate",,"Article"
"42980","123456789/35008",,"Campa-Molina, J., Laboratorio de Investigación en Materiales, DIP-CUCEI, Universidad de Guadalajara, Apdo. Postal 2-638, CP 44281 Guadalajara Jal, Mexico, Cicese-CCMC-Unam, Apdo. Postal 2-681, CP22800, Ensenada B.C., Mexico; Blanco, O., Laboratorio de Investigación en Materiales, DIP-CUCEI, Universidad de Guadalajara, Apdo. Postal 2-638, CP 44281 Guadalajara Jal, Mexico, Cicese-CCMC-Unam, Apdo. Postal 2-681, CP22800, Ensenada B.C., Mexico; Correa-Gomez, A., Laboratorio de Investigación en Materiales, DIP-CUCEI, Universidad de Guadalajara, Apdo. Postal 2-638, CP 44281 Guadalajara Jal, Mexico; Czank, M., Institut for Geowissenschaften, Universityt Kiel, Olshausenstrasse 40, D24098, Kiel, Germany; Castellanos-Guzman, A.G., Laboratorio de Investigación en Materiales, DIP-CUCEI, Universidad de Guadalajara, Apdo. Postal 2-638, CP 44281 Guadalajara Jal, Mexico",,"Campa-Molina, J. Blanco, O. Correa-Gomez, A. Czank, M. Castellanos-Guzman, A.G.",,"2002",,"The domain structures of Zn3B7O13Cl, Zn3B7O13Br and Zn3B 7O13I boracite single crystals were studied by means of polarized light in conjunction with electron microscopy. Single crystals of the three compositions were grown by chemical transport reactions in closed quartz ampoules, at a temperature of 900 °C and were examined by polarizing optical microscopy (PLM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). For both PLM and SEM, the same as-grown samples were used without having to resort to metallization of the crystal faces. For TEM the single crystals were crushed and mounted on holey carbon films. Comparative electron microscope images were useful for revealing the domain structure of these ferroelectric/ferroelastic materials previously observed between the crossed polars of an optical microscope. X-ray diffraction analysis of the pulverized crystals was performed for this triad of halogen boracites containing zinc as a common metal. " 2002 The Royal Microscopical Society.