Effect of pH on the dispersability of silicon carbide powders in aqueous media

Rao, R. Ramachandra; Roopa, HN; Kannan, T. S.

doi:10.1016/s0272-8842(98)00027-3

Cited by 80 publications

(10 citation statements)

References 15 publications

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“…The sedimentation behavior of the suspension was studied as a function of time at different pH. The total height of the suspension in the measuring cylinder was taken as dispersion volume at the time t = 0 and subsequently the maximum level of turbidity (the solid sedimented plus the solid particles under dispersion) below the clear liquid as the dispersion volume at the different time intervals [4,11,12].…”

Section: Sedimentation Testmentioning

confidence: 99%

Stability of dispersions of colloidal alumina particles in aqueous suspensions

Singh

Menchavez

Takai³

et al. 2005

Journal of Colloid and Interface Science

175

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Section: Sedimentation Testmentioning

confidence: 99%

Stability of dispersions of colloidal alumina particles in aqueous suspensions

Singh

Menchavez

Takai³

et al. 2005

Journal of Colloid and Interface Science

175

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“…[4,5,8,13] This technique is very simple, rapid, and accurate. In this technique ceramic slurry having different amount of dispersant is prepared, homogenized, and kept for sometime to stabilized.…”

Section: Rheological Measurement Techniquementioning

confidence: 99%

Selection and Optimization of Dispersant in Ceramic Slurry Processing by Different Techniques: Comparison, Correlation, and Standardization

Singh

Jena

Besra

et al. 2007

Journal of Dispersion Science and Technology

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This article describes the selection and optimization of dispersant dosage in colloidal processing of ceramic slurry by techniques such as particle charge detector (PCD), capillary suction time (CST), rheological measurement, and wet point and flow point techniques. In general, experimental results are found to be in good agreement with each other with some degree of variation. PCD, CST, and rheological techniques are related by a simple linear function. The experimental and calculated values are well matching within an error limit of 10%. Attempt has been made to develop formula for correlating results of optimization from one technique to those obtained from another technique. The region where the suspension is well dispersed, CST is linearly correlated with PCD. The advantages and limitations of each technique have been described and discussed.

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“…The characterization of particle dispersibility in slurry is conventionally carried out by rheological measurement, 1)6) electrokinetic measurement, 6), 7) particle size measurement 8), 9) and sedimentation test. 8),10),11) The characterization of particle dispersibility in multi-component slurry is much more difficult as compared to that in single-component one. For instance, neutral zeta potential could be interpreted as two situations: 1) net charge is zero but co-existence of positively-and negatively charged particles, or 2) zero charge of every particle.…”

Section: Introductionmentioning

confidence: 99%

Characterization of dispersion and coagulation behaviour of alumina and silica particles in the mixed slurry by a drain time measurement

Watanabe

Kawade

Shirai

et al. 2011

J. Ceram. Soc. Japan

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In this study, we have proposed "drain time" (DT) measurement to be used for the characterization of particle dispersion states in the multi-component slurry, which are much more complicated than those in single-component one. The DT is related to drainage characteristics of a solvent from ceramic slurry cake, of which particle packing is correlated in principle to particle dispersibility in the slurry. For mixed slurry of alumina and silica powders, higher DT values at acidic and basic conditions indicated relative good dispersion but lower DT values around neutral pH region implied hetero-coagulation of alumina and silica particles. These dispersion and coagulation patterns were confirmed by electron microscopy for thin section of in-situ solidified slurry, and hence the DT measurement was found to be feasible for the characterization of particle dispersibility in multi-component slurry.

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Effect of pH on the dispersability of silicon carbide powders in aqueous media

Cited by 80 publications

References 15 publications

Stability of dispersions of colloidal alumina particles in aqueous suspensions

Stability of dispersions of colloidal alumina particles in aqueous suspensions

Selection and Optimization of Dispersant in Ceramic Slurry Processing by Different Techniques: Comparison, Correlation, and Standardization

Characterization of dispersion and coagulation behaviour of alumina and silica particles in the mixed slurry by a drain time measurement

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