Crystalline and pore structure of zirconia-based sorbents: 1. Zirconia-alumina solid solution / Bogdanov S.G., Pirogov A.N., Skryabin Y.N., Teplykh A.E., Borovkova O.L., Sharygin L.M. // Journal of Surface Investigation. - 2015. - V. 9, l. 3. - P. 616-623.

ISSN:

10274510

Type:

Article

Abstract:

An 8ZrO2 · Al2O3 solid solution of zirconia and alumina is studied by X-ray and neutron diffraction, small-angle neutron scattering, and nitrogen sorption. The samples are synthesized by the sol-gel method and then subjected to heat treatment at temperatures Tan of 450, 600, and 950°C for 6–8 h. The first two samples are identified as X-ray amorphous, while the third sample has a complete crystalline structure (predominantly tetragonal phase, space group P42/nmc). The size of the coherent scattering region is 10–20 nm. The small-angle neutron scattering curves exhibit a pronounced peak; the peak position is shifted to low momentum-transfer values with increasing annealing temperature. The presence of a peak suggests that there is a certain correlation in the distribution of solid-phase particles in the sample volume. The density-density correlation functions are numerically established from the experimental small-angle scattering cross sections by the inverse Fourier transform method. The correlation lengths, volume fractions of the nanoparticles (pores), and specific surface areas of the samples are determined. As the annealing temperature rises, the characteristic pore size increases from 3.0 to 7.3 nm and the specific surface area of the samples decreases from 134 to 45 m2/g. It is speculated that the samples contain a significant amount of pores with a size of less than 1 nm. © 2015, Pleiades Publishing, Ltd.

Author keywords:

phase composition; porosity; small-angle scattering; structure; X-ray and neutron diffraction; zirconia-alumina solid solution

Index keywords:

Alumina; Coherent scattering; Crystalline materials; Inverse problems; Neutron diffraction; Phase composition; Pore size; Porosity; Sol-gel process; Sol-gels; Solid solutions; Specific surface area; S

DOI:

10.1134/S1027451015030192

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https://www.scopus.com/inward/record.uri?eid=2-s2.0-84930628487&doi=10.1134%2fS1027451015030192&partnerID=40&md5=3ea96c07edbe2a68c3761d72c8119b9d

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Link	https://www.scopus.com/inward/record.uri?eid=2-s2.0-84930628487&doi=10.1134%2fS1027451015030192&partnerID=40&md5=3ea96c07edbe2a68c3761d72c8119b9d
Affiliations	Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, Yekaterinburg, Russian Federation; Ural Federal University, Yekaterinburg, Russian Federation; Termoksid Research and Production Company, Zarechnyi, Sverdlovsk oblast, Russian Federation
Author Keywords	phase composition; porosity; small-angle scattering; structure; X-ray and neutron diffraction; zirconia-alumina solid solution
References	Chemical Encyclopedy (Sov. Entsiklopediya, Moscow, 1999), Vol. 5, p. 783 [in Russian]; Sharygin, L.M., (2011) Sol-Gel Technology of Nanomaterials, , Ural. Otd. RAN, Yekaterinburg; Sharygin, L.M., (2012) Heat-Resistant Inorganic Sorbents, , Ural. Otd. RAN, Yekaterinburg; Strekalovskii, V.N., Polezhaev, Y.M., Pal’guev, S.F., (1987) Oxides with Impurity Disordering: Composition, Structure, Phase Transformations, , Nauka, Moscow; Southon, P., (2000) PhD Thesis, , University of Technology, Sydney; Rodrigues-Garvajal, J., (1993) Physica B, 192, p. 55; Schmatz, W., (1976) Proceedings of the Conference on Neutron Scattering, Gatlinburg, Tennessee, USA, June 6–10, 1976, p. 1037; Sharygin, L.M., Galkin, V.M., Tret’yakov, S.Y., (1992) Neorg. Mater., 28, p. 1543; Umanskii, Y.S., (1969) X-ray Diffraction Studies of Metals and Semiconductors, , Metallurgiya, Moscow; Valiev, E.Z., Bogdanov, S.G., Dorofeev, Y.A., (1991) Sov. Phys. JETP, 73, p. 552; Valiev, E.Z., Bogdanov, S.G., Pirogov, A.N., Sharygin, L.M., Barybin, V.I., (1993) J. Exp. Theor. Phys., 76, p. 111; Bogdanov, S.G., Dorofeev, Y.A., Pirogov, A.N., Skryabin, Y.N., Teplykh, A.E., Sharygin, L.M., (2011) J. Surf. Invest.: X-ray, Synchrotron Neutron Tech., 5, p. 575; Guinier, A., Fournet, G., (1955) Small-Angle Scattering of X-rays, p. 46. , Wiley, New York, London; Debye, P., Anderson, H.R., Brumberger, H., (1957) J. Appl. Phys., 28, p. 679; Svergun, D.I., Feigin, L.A., (1986) Small-Angle X-ray and Neutron Scattering, p. 45. , Nauka, Moscow; Valiev, E.Z., Ostroushko, A.A., Bogdanov, S.G., (2001) Poverkhnost’, 11, p. 38; Valiev, E.Z., Bogdanov, S.G., Pirogov, A.N., Kuklin, A.I., (2002) Poverkhnost’, 2, p. 59
Correspondence Address	Bogdanov, S.G.; Institute of Metal Physics, Ural Branch, Russian Academy of SciencesRussian Federation
Publisher	Maik Nauka-Interperiodica Publishing
Language of Original Document	English
Abbreviated Source Title	J. Surf. Invest.
Source	Scopus