✦ LIBER ✦

Synthesis and characterization of precursors for group II metal aluminates

✍ Scribed by Ramasubramanian Narayanan; Richrad M. Laine

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 199 KB
Volume: 11
Category: Article
ISSN: 0268-2605
DOI: 10.1002/(sici)1099-0739(199710/11)11:10/11<919::aid-aoc666>3.0.co;2-z

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✦ Synopsis

Precursors to Group II metal aluminates (MAI 2 O 4 , M = Mg, Ca, Ba, Sr) are synthesized from inexpensive starting materials including Group II metal oxides/hydroxides, Al(OH) 3 , triethanolamine (TEA) and ethylene glycol, in a one-pot synthesis process. The precursors are soluble in common organic solvents and can be handled in moist air for a reasonable period of time. On pyrolysis in air to 1200 °C, all three precursors transform to the corresponding Group II metal aluminates. A termetallic double alkoxide, 'ionomer-like' structure is proposed, wherein the alkalineearth metal is encapsulated by a TEA molecule bridging two alumatrane units. The precursors were characterized using TGA, NMR, mass spectroscopy and elemental analyses, and the pyrolysed precursors were briefly characterized using x-ray diffraction analysis.

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