Structure of zirconium phosphate gels produced by the sol-gel method / Bogdanov S.G., Valiev E.Z., Dorofeev Yu.A., Pirogov A.N., Sharygin L.M., Moisseev V.E., Galkin V.M. // Journal of Physics Condensed Matter. - 1997. - V. 9, l. 20. - P. 4031-4039.

ISSN:

09538984

Type:

Article

Abstract:

Several zirconium phosphate (ZrP) gels of various water contents produced by a sol-gel method were investigated. They were found to be the polymer-class gels using the method of small-angle neutron scattering. X-ray diffraction analysis revealed that their solidphase framework was formed from branched fragments (layers and blocks) of α-ZrP crystal structure. These gels are strongly fluctuating systems when they are on the scale of r < ξ. Their fluctuation character is shown to be described by two parameters: a correlation radius ξ and a fractal dimension D. It was found that ξ ≈ 2.5 nm and almost did not depend on the water content and that D increased from 1.4 ± 0.25 to 2.6 ± 0.20 when the water content decreased from 50% to 0% as the gels were dried to a temperature of 105 °C. Simultaneously, substantial shrinkage of granules, a decrease in porosity and ion-exchange capability, and formation of blocks from α-phosphate layers occurred with α decrease in the water of the hydrogel as it dried. A probable description of the evolution of the ZrP-gel structure with variation in the water content during drying is suggested on the basis of the data obtained.

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DOI:

10.1088/0953-8984/9/20/003

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Link	https://www.scopus.com/inward/record.uri?eid=2-s2.0-5844237815&doi=10.1088%2f0953-8984%2f9%2f20%2f003&partnerID=40&md5=3ed79b9b4b50bb2b3fab0fc15ef32413
Affiliations	Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, 620219 Ekaterinburg, Russian Federation; Firm Termoxid, 624051 Zarechny, Sverdlovsk Region, Russian Federation
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Correspondence Address	Bogdanov, S.G.; Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, 620219 Ekaterinburg, Russian Federation
CODEN	JCOME
Language of Original Document	English
Abbreviated Source Title	J Phys Condens Matter
Source	Scopus