ISSN:
0268-2605
Schlagwort(e):
sol-gel
;
ceramics
;
glasses
;
films
;
organometallic
;
titanium
;
niobium
;
Chemistry
;
Industrial Chemistry and Chemical Engineering
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
The advent of the sol-gel technique over the past several decades and the recognition of its excellent flexibility for synthesizing a large variety of oxide ceramics and glasses in both bulk and thin-film forms has generated considerable interest in using solution-based processes to prepare ceramic materials. Because of the success of the sol-gel technique, a number of other chemical processes have been developed utilizing metalorganic/organometallic starting materials to create molecularly architectured precursors, which have proven effective in synthesizing both oxide and non-oxide materials. In the present study, two different chemical approaches have been implemented to synthesize non-oxides (sulfides and nitrides) of reactive transition-metal elements. Accordingly, a novel thio-sol-gel process for preparing TiS2 and NbS2 powders has been studied. In the case of TiS2 synthesis, the chemical reaction has been examined in detail using Fourier-transform infrared spectroscopy (FTIR) and gas chromatography (GC). The effects of modification of the titanium precursor on the morphology of the final sulfide have also been investigated and are discussed. A second, more generalized process has been developed for synthesizing homogeneous precursors in multicomponent systems. Its utilization in preparing ternary nitrides has been demonstrated, and is also presented. © 1997 by John Wiley & Sons, Ltd.
Zusätzliches Material:
9 Ill.
Materialart:
Digitale Medien
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