Controlling the strength of silica gel by high-temperature thermal treatment

Journal Article · Thu May 01 04:00:00 EDT 1986 · Colloid J. USSR (Engl. Transl.); (United States)

OSTI ID:6811910

Gurevich, V R; Abdullaeva, L B; Sheidaeva, N M

Changes in the strength and pore structure of silica gels calcined under different conditions have been investigated. At 600-950/sup 0/C a substantial strenthening of the xerogel skeleton takes place. Based on a combined processing of data on the variation in the silica gel surfaces, strength, pore volume, and accordingly, the coordination number of the globules, as well as the pore radius distribution, it is concluded that the specific strength of silica gel material remains constant at the points of contact, and is close to the value known for opaque quartz. The area of the interglobule contacts is also unchanged with thermal treatment. The observed increase in strength is determined only by a change in the packing density.

• Research Organization: All-Union Sci-Res. Institute for Preparation and Processing of Olefins, Baku
• OSTI ID: 6811910
• Journal Information: Colloid J. USSR (Engl. Transl.); (United States), Journal Name: Colloid J. USSR (Engl. Transl.); (United States) Vol. 47:6; ISSN COJOA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ADSORBENTS
CALCINATION
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
COMPRESSION STRENGTH
CRYSTAL STRUCTURE
DECOMPOSITION
DENSITY
HEAT TREATMENTS
MECHANICAL PROPERTIES
MICROSTRUCTURE
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POROSITY
PYROLYSIS
QUARTZ
SILICA GEL
SILICON COMPOUNDS
SILICON OXIDES
SUBSTRATES
SURFACE PROPERTIES
SYNTHESIS
THERMOCHEMICAL PROCESSES