The stability of alumina-zirconia suspensions

Ramakrishnan, V.; Pradip,; Malghan, S.G.

doi:10.1016/s0927-7757(97)00135-0

Cited by 15 publications

(16 citation statements)

References 12 publications

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“…The linear relationship obtained for the suspension without GO is less accurate due to a relatively large degree of scatter in the data but is regarded as acceptable. The intercept value of the zeta potential squared axis is larger than that previously reported 41 giving a zeta potential value ranging from 45 to 55 mV. This value is higher than that with GO meaning that a weaker network structure is formed by GO at the pH of zero zeta potential.…”

Section: Resultscontrasting

confidence: 63%

“…This value is higher than that with GO meaning that a weaker network structure is formed by GO at the pH of zero zeta potential. 41 For the AO802 alumina suspensions with and without GO, linear relationships as shown in Figure 7b appeared to also describe the yield stress and zeta potential squared data. The fit, like the AKP 30, is bad for data in the low yield stress region.…”

Section: Resultsmentioning

confidence: 80%

“…If the model is obeyed, then the yield stress should decrease linearly with the square of the zeta potential where for many suspensions this has been the case. [39][40][41] Generally, the yield stress of most suspensions does not scale to / 2 . In the presence of adsorbed additive, the minimum separation distance between two interacting particles in the flocculated state will be increased by the adsorbed layer.…”

Section: Resultsmentioning

confidence: 99%

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Surface force arising from adsorbed graphene oxide in alumina suspensions with different shape and size

et al. 2013

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The effects of graphene oxide (GO) on the yield stress-pH of a-Al 2 O 3 (alumina) suspensions were investigated. For micron-sized platelet alumina suspensions, micron-sized GO additive increased the maximum yield stress by as much as six-folds. This was attributed to GO-mediated bridging interactions between the platelet particles. This type of bridging interactions was much less effective with submicron-sized, spherical, and irregular shape alumina. Adsorption of the anionic GO reflected by the shift of pH of zero zeta potential to a lower pH is particularly high for platelet alumina. The 1.0 dwb % GO concentration added is sufficient to reinforce each platelet particle-particle bond, assisted by a directed GO-platelet interaction configuration. This is, however, not true with submicron-sized particles as the particle concentration increases sharply with the inverse of the particle diameter to power of 3. Moreover, a GO sheet can adsorb several submicron-sized particles and this does not produce the right interaction configuration.

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Section: Resultscontrasting

confidence: 63%

Section: Resultsmentioning

confidence: 80%

Section: Resultsmentioning

confidence: 99%

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Surface force arising from adsorbed graphene oxide in alumina suspensions with different shape and size

et al. 2013

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“…These interactions lead to the dispersion of colloids, maintain the suspension and dispersion for a long time, and do not flocculate sediments. 1,2) If nanoparticles can stay suspended in fluid stably, they can be applied in many industries to exert special effects of nanomaterials. The most common method for particles to maintain good dispersion and stable suspension in fluid has been ultrasonic vibration, a physical method.…”

Section: Introductionmentioning

confidence: 99%

Electrostatic and Sterical Stabilization of CuO Nanofluid Prepared by Vacuum Arc Spray Nanofluid Synthesis System (ASNSS)

et al. 2009

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Nanoparticles can be dispersed by different methods in order to completely utilize their unique material characteristics. This study uses a self-developed nanofluid synthesis system to produce a CuO nanofluid with good suspension stability and particle dispersion without additives. The prepared CuO nanofluid has an average particle size of 60 nm and a substantially improved size distribution. The effect of the electrical double layer on the stability of the prepared CuO nanofluid was experimentally assessed by studies using different concentrations and by rheological experiments. Furthermore, the relationships between the pH value and Zeta potential, hydrodynamic radius and Uv/Vis spectra of the prepared CuO nanofluids are also discussed. The experimental results show that the CuO nanofluid still maintains its Zeta potential at above 30 mV for longer than 6 months, indicating high suspension stability.

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“…Compacts prepared from ultrasonicated suspension exhibited more that 55% elongation as a result of extremely fine and uniform microstructure resulting from colloidal processing. Ramakrishnan et al [91] noticed that due to the difference in pH range of stability of Al 2 O 3 and ZrO 2 , their mixed suspension exhibited heterocoagulation. Experimental results indicated while the zirconia suspension is stable either below pH 6 or above pH 8.…”

Section: Powder Processing: Colloidal Processingmentioning

confidence: 99%

Relationship between residual stresses and mechanical behavior in ceramic composites

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The stability of alumina-zirconia suspensions

Cited by 15 publications

References 12 publications

Surface force arising from adsorbed graphene oxide in alumina suspensions with different shape and size

Surface force arising from adsorbed graphene oxide in alumina suspensions with different shape and size

Electrostatic and Sterical Stabilization of CuO Nanofluid Prepared by Vacuum Arc Spray Nanofluid Synthesis System (ASNSS)

Relationship between residual stresses and mechanical behavior in ceramic composites

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