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231223s2008 xx |||||o 00| ||eng c |
| 024 |
7 |
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|a 10.1021/la801300m
|2 doi
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|a pubmed24n0604.xml
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|a (DE-627)NLM181300923
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|a (NLM)18671420
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Olhero, Susana M
|e verfasserin
|4 aut
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| 245 |
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|a Surface passivation of MgAl2O4 spinel powder by chemisorbing H3PO4 for easy aqueous processing
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|c 2008
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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| 338 |
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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| 500 |
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|a Date Completed 13.11.2008
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|a Date Revised 29.08.2008
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a A stoichiometric MgAl 2O 4 spinel (MAS) powder was synthesized by heat treating at 1400 degrees C for 2 h a compacted mixture of alpha-Al 2O 3 and calcined caustic MgO, followed by crushing and milling. The surface of this powder was then passivated against hydrolysis with H 3PO 4 and Al(H 2PO 4) 3 in an ethanol solution. The as-passivated powder could then be dispersed in water using tetramethylammonium hydroxide (TMAH) and an ammonium salt of poly(acrylic acid) (Duramax D-3005) as dispersing agents and gelcast to form green consolidates with relatively high strength (>15 MPa). The good dispersing behavior of the passivated powder in water was confirmed by the low viscosity of its suspension containing 41-45 vol % solids, demonstrating the viability of replacing organic solvents by water in colloidal processing of MAS-based ceramics. The Fourier transform infrared (FT-IR), X-ray diffraction (XRD), and energy dispersive X-ray (EDAX) studies revealed that only negligible amounts of phosphate ions at the surface are required to effectively protect the powder from reacting with water
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|a Journal Article
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1 |
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|a Ganesh, Ibram
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Torres, Paula M C
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Ferreira, José M F
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 24(2008), 17 vom: 02. Sept., Seite 9525-30
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
1 |
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|g volume:24
|g year:2008
|g number:17
|g day:02
|g month:09
|g pages:9525-30
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| 856 |
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|u http://dx.doi.org/10.1021/la801300m
|3 Volltext
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