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Chemical effects of DCCA to the sol-gel reaction process (1994)

Uchida, N. ; Ishiyama, N. ; Kato, Z. ; [et al.]

Springer

Journal of materials science 29 (1994), S. 5188-5192

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ISSN: 1573-4803

Source: Springer Online Journal Archives 1860-2000

Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Notes: Abstract The effects of drying control chemical additives (DCCA) on the growth of silica particles, gelation time and physical properties of the dry gel were examined in a two-step silica sol-gel process.N,N-dimethylformamide,N,N-dimethylacetamide and ethylene glycol (EG) were applied as DCCAs. The shapes of growing silica particles were distorted spheres on addition of DCCA. EG accelerated the gelation process. Despite the use of DCCA, crack-free, dry gels were obtained only under limited conditions.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01151115

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