Rheology of concentrated suspensions of plasma-processed fine alumina

• Autorzy: Jakobsons E. , Faitelson L. , Palcevskis E.
• Konferencja: Second International Conference on Engineering Rheology ICER 2003
• Języki publikacji: EN

Abstrakty

EN

The rheological properties (flow curves and viscoelastic behavior) of the injection-moulded suspensions prepared from two nanosized plasma-processed Al2O3 powders and water were investigated on wide ranges of shear rates and frequencies . Tiron (disodium salt of 4,5-dihydroxy-1,3-benzene-disulfonic acid) was chosen as a surfactant for preparation of the concentrated alumina suspensions. It is stated that, at an optimal Tiron content in suspensions, their viscosity, yield stress, and complex shear modulus have minimal values. A correlation was shown to exist between the optimal concentration of the dispersant obtained by rheological tests on the alumina powder water suspensions and the mentioned optimal concentration determined by measuring the zeta potential.

Słowa kluczowe

EN

aluminium nitride; zeta potential; nanosized particles; injection moulding suspension; rheology of concentrated Al2O3 suspensions

PL

reologia; azotek glinu; formowanie wtryskowe

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2003
• Tom: Vol. 8, no spec.
• Strony: 251--258
• Opis fizyczny: Bibliogr. 15 poz., tab., wykr.

Twórcy

autor

Jakobsons E.

• Institute of Polymer Mechanics, 23 Aizkraukles Str., LV-1006, Riga, LATVIA

autor

Faitelson L.

• Institute of Polymer Mechanics, 23 Aizkraukles Str., LV-1006, Riga, LATVIA

autor

Palcevskis E.

• Institute of Inorganic Chemistry of the Riga Technical University 34 Miera str., Salaspils-1, LV-2169, LATVIA

Bibliografia

• [1] Brinker C.J. and Scherer G.W. (1990): Sol-Gel Science. The Physics and Chemistry Processing. - N.Y.: Academic Press.
• [2] Cesarano III I. and Aksay I.A. (1988): Processing of highly concentrated aqueous a-alumina suspensions stabilized with polyelectrolytes. - J. Am. Ceram. Soc., vol.71, pp.1062-1067.
• [3] Chera L., Palcevskis E., Berzins M. and Lipe A. (2001): The influence of some surfactants on obtaining concentrated aqueous suspensions of plasma processed fine alumina, In: Materials Engineering and Balttrib 2001 (J. Grabis, J. Krastinś, Eds.). - Materials of the X-th International Baltic Conference, September 27-28, Jurmala, Latvia, Riga, pp.22-26.
• [4] Dzuy N.Q. and Boger D.V. (1983): Yield stress measurement for concentrated suspensions. - J. Rheol., vol.27, pp.321-349.
• [5] German R.M., Hens K.F. and Lin S.-T.P. (1991): Key issues in powder injection molding. - Am. Ceram. Soc. Buli., vol.70, pp. 1294-1302.
• [6] German R.M. and Bose A. (1997): Injection Molding of Metals and Ceramics. - Princeton: Metal Powder Industries Federation.
• [7] Leong Y.K., Bogera D.V. and Parris D. (1991): Surface chemistry and rheological properties of zirconia suspensions. - J. Rheol., vol.35,pp.l49-165.
• [8] Larson G.L. (1999): The Structure and Rheology of Complex Fluids. - Oxford: Oxford University Press.
• [9] Rueb C.J. and Zukoski C.F. (1997): Viscoelastic properties of colloidal gels. - J. Rheol., vol.41, pp.197-218.
• [10] Nguyen QD. and. Boger DV. (1992): Measuring the flow properties of yield stress fluids. - Annu. Rev. Fluid Mech,, vol.24, pp.47-88.
• [11] Nikumbh A.K., Schmidt H., Martin K., Porz F. and Thummler F. (1990): Influence of pH on rheological properties of Al203 slips. - J. Mater. Sci., vol.25, pp.15-21.
• [12] Shih W.-H., Liu J., Shih W.Y., Sarikaya M. and Aksay I.A. (1989): Mechanical properties of colloidal gels. - Mater, Res. Soc. Symp. Proc., vol.l55, pp.83-92.
• [13] Shih W.-H., Shih W.Y., Kim S.-I., Liu J. and Aksay I.A. (1990): Scaling behavior of the elastic properties of colloidal gels. -Phys. Rev., vol.A42, pp.4722-4778.
• [14] Zhou Z., Solomon M., Scales P.J. and Boger D.V. (1999): The yield stress of concentrated flocculated suspensions of size distributed particles. - J. Rheol., vol.43, pp.651-671.
• [15] Zupancic A., Lapasin R. and Kristoffersson A. (1998): Influence of particle concentration on rheological properties of aqueous a-Al2 O3 suspensions. - J. Europ. Ceram. Soc., vol.l8, pp.467-477.