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Westby, W.S; Kooner, S.; Farries, P.M.; Boother, P.; Shatwell, R.A.

doi:10.1023/a:1004788428211

Cited by 17 publications

(3 citation statements)

References 4 publications

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“…In fact, the conjunction of an amine with high basicity and a carboxylic acid will promote the deprotonation of the acid groups and therefore the production of the citrate group COO − . The citrate groups will be adsorbed on the ceramic particle surface, which in this way will be charged negatively [9,10].…”

Section: Dispersantmentioning

confidence: 99%

A novel method for preparing and characterizing alcoholic EPD suspensions

Riccardis

Carbone

Rizzo

2007

Journal of Colloid and Interface Science

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Section: Dispersantmentioning

confidence: 99%

A novel method for preparing and characterizing alcoholic EPD suspensions

Riccardis

Carbone

Rizzo

2007

Journal of Colloid and Interface Science

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“…In another research, Mizuguchi 57,58 proposed that using sulfuric acid for charging of alumina and YBa 2 Cu 3 O 7{x particles in a mixture of acetone and nitrocellulose media introduces negative charge on the surface of particles due to adsorption of sulphate ions. Also, Kooner and Westby 59,60 showed that addition of tartaric acid and citric acid in conjunction with basic amine groups introduces negative charge on the surface of alumina and silica particles in an ethyl alcohol media. They used amine basic groups to increase ionisation of carboxylic acid in alcohol.…”

Section: Zeta Potential and Conductivitymentioning

confidence: 99%

Studying surface charge and suspension stability of hydroxyapatite powder in isopropyl alcohol to prepare stable suspension for electrophoretic deposition

Javidi

Bahrololoom

Javadpour

et al. 2009

Advances in Applied Ceramics

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Suspension stability of hydroxyapatite powder in isopropyl alcohol was investigated by measuring zeta potential. In this study, isopropyl alcohol was used as a suspension media, and nitric acid, polyvinyl butyral and polyethylenimine were the dispersing agents. Fine grain particles with mean particle size and surface area of 2?54 mm and 5?8 m 2 g 21 respectively, were prepared. Stable suspensions were made by mixing 40 g L 21 milled powders in isopropyl alcohol. The zeta potential of the suspensions was measured by using zeta sizer equipment. The results showed that by adding nitric acid and polyvinyl butyral to the system, negative charge was introduced, while polyethylenimine donated positive charge to the surface of particles and induced electrostatic and steric stabilisation. It was concluded that the suspension which was stabilised with 4 g L 21 polyethylenimine revealed the highest zeta potential and stability which is suitable for cathodic electrophoretic deposition.

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“…Boehmite (or alumina) and silica migrated to the same electrode because of the formation of these "composite" particles [2]. The electrophoretic codeposition of submicron alumina powder and amorphous silica from ethanolic suspensions was investigated in [3]. Furthermore, the EPD of a powder of stoichiometric mullite composition synthesised using low-temperature hydrothermal processing is described in the literature [4].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Electrophoretic Deposition of Mullite Precursor Sols for the Oxidation Protection of Carbon Fibre Reinforced Composites

Moritz

Herbig²,

Damjanović³

et al. 2006

Advances in Science and Technology

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The preparation of mullite coatings for the oxidation protection of carbon fibre reinforced composites using a combination of sol-gel synthesis and electrophoretic deposition (EPD) has been investigated. Mullite precursor sols were synthesised by controlled hydrolysis and condensation reactions of the metal alkoxides TEOS (tetraethoxysilane) and Al(OBus)3 (aluminiumtri-sec-butylate). The structure and properties of the mullite precursor were strongly influenced by the synthesis parameters, especially by the water to TEOS ratio (rw/Si) and the pH value of the water. A variety of synthesis conditions was tested for optimising the mullite precursor sols regarding their suitability for the electrophoretic deposition. The electrokinetic behaviour of the sols and the charging of the sol particles which is necessary for a successful EPD were investigated by measurements of the Electrokinetic Sonic Amplitude (ESA signal). 29Si CP/MAS NMR measurements were used to get information about the coordination of the silicon and the homogeneity of the Al/Si distribution in the precursors. Heat-treated samples were characterised by X-ray diffraction for investigating the mullite formation. Coatings prepared by EPD and sintering at 1300 °C in Ar enabled an effective oxidation protection in the temperature range 1200 °C ≤ T ≤ 1550 °C.

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Untitled

Cited by 17 publications

References 4 publications

A novel method for preparing and characterizing alcoholic EPD suspensions

A novel method for preparing and characterizing alcoholic EPD suspensions

Studying surface charge and suspension stability of hydroxyapatite powder in isopropyl alcohol to prepare stable suspension for electrophoretic deposition

Synthesis and Electrophoretic Deposition of Mullite Precursor Sols for the Oxidation Protection of Carbon Fibre Reinforced Composites

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