Rheology in the technology of ceramics and refractories. 2. Dispersed systems, methods of their investigation and evaluation of rheological properties
- 31 Downloads
Abstract
A classification of dispersed systems in accordance with their phase composition is presented. A common feature of the latter is its heterogeneity and the presence of a strongly developed interphase. The specific surface of the interphase in suspensions varies from 0.5–1 to 10–20 m2/cm3. This characteristic determines the technogenic and rheological properties of suspensions. The principal methods of experimental rheology (rheometry) are described. The methods of rotational and capillary viscometry and methods for evaluating flow anomalies in dispersed systems are considered. Ceramic suspensions are considered from the standpoint of applicability of exponential formulas for describing the degree of their thixotropy or dilatancy. The notion of intensity of variation of the effective viscosity of non-Newtonian dispersed systems is formulated and quantitative characteristics are suggested for its evaluation. Quantitative parameters describing the intensity of thixotropic disruption and dilatant strengthening of suspensions are suggested.
Keywords
Viscosity Specific Surface Phase Composition Rheological Property Quantitative CharacteristicPreview
Unable to display preview. Download preview PDF.
References
- 1.Yu. E. Pivinskii, “Rheology in the technology of ceramics and refractories. Fundamentals and rheological models,”Ogneupory, No. 3, 7–15 (1994).Google Scholar
- 2.N. B. Ur'ev,Highly Concentrated Dispersed Systems [in Russian], Khimiya, Moscow (1980).Google Scholar
- 3.V. L. Balkevich and Yu. M. Mosin,Rheological Properties of Ceramic Mixtures [in Russian], Izd. MKhTI im. D. I. Mendeleva, Moscow (1988).Google Scholar
- 4.Yu. E. Pivinskii,Ceramic Binders and Ceramic Concretes [in Russian], Metallurgiya, Moscow (1990).Google Scholar
- 5.S. P. Nichiporenko,Physicochemical Mechanics of Dispersed Structures in the Technology of Structural Ceramics [in Russian], Naukova Dumka, Kiev (1968).Google Scholar
- 6.N. N. Kruglitskii,Foundations of Physicochemical Mechanics, Part 1 [in Russian], Vysheishaya Shkola, Kiev (1975).Google Scholar
- 7.N. B. Ur'ev and M. A. Taleisnik,Physicochemical Mechanics and Intensification of Formation of Food Masses [in Russian], Pishchevaya Promyshlennost', Moscow (1976).Google Scholar
- 8.M. Reiner,Deformation and Flow [in Russian], Gostoptekhizdat, Moscow (1963).Google Scholar
- 9.B. A. Machikhin (ed.),Rheometry of Raw and Cooked Food Products [in Russian], Agropromizdat, Moscow (1990).Google Scholar
- 10.I. M. Belkin, G. V. Vinogradov, and A. I. Leonov,Rotational Devices [in Russian], Mashinostroenie, Moscow (1968).Google Scholar
- 11.D. N. Poluboyarinov and R. Ya. Popil'skii (eds.),A Practical Course on the Technology of Ceramics and Refractories [in Russian], Stroiizdat, Moscow (1972).Google Scholar
- 12.Yu. E. Pivinskii,Quartz Ceramics [in Russian], Metallurgiya, Moscow (1974).Google Scholar
- 13.V. I. Savchenko,The Technology of Enameling and the Equipment of Enameling Shops [in Russian], Metallurgiya, Moscow (1961).Google Scholar
- 14.Yu. E. Pivinskii, “Refractory concretes of a new generation. Vibration methods of compacting and shaping,”Ogneupory, No. 7, 2–11 (1994).Google Scholar
- 15.W. Wilkinson,Non-Newtonian Fluids. Fluid Mechanics, Mixing and Heat Transfer, London (1960).Google Scholar
- 16.F. S. Kaplan, Yu. E. Pivinskii, and A. N. Saprykin, “On special features of dilatant strengthening of quartz glass suspensions,”Kolloid. Zh.,50(6), 1092–1099 (1988).Google Scholar
- 17.Yu. E. Pivinskii, V. G. Podobetda, and A. D. Buravov, “Some properties of aqueous suspensions of silicon nitride,”Poroshk. Metallurg., No. 3, 37–42 (1976).Google Scholar