Characterization of the surface area and porosity of sol-gel films using saw devices. [Silicates; surface acoustic wave (SAW)]

Conference · Fri Jan 01 00:00:00 EST 1988

OSTI ID:5574566

Frye, G C; Ricco, A J; Martin, S J; Brinker, C J

A novel technique for accurately obtaining nitrogen adsorption isotherms on thin porous films has been developed. These isotherms are useful for characterizing the surface area and pore size distribution of porous samples. The sensitivity to adsorbed nitrogen is increased by several orders of magnitude over conventional techniques by forming the test film on the substrate of a surface acoustic wave (SAW) device. This device functions as a microbalance able to detect less than 100 pg of adsorbed nitrogen per cm{sup 2} of film. Surface areas and pore size distributions were calculated from adsorption isotherms obtained with this technique on silicate sol-gel films. The results are compared to those for bulk samples prepared from similar sol-gel solutions. 18 refs., 5 figs., 1 tab.)

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5574566
• Report Number(s): SAND-87-2673C; CONF-880408-46; ON: DE88008794
• Resource Relation: Conference: Spring meeting of the Materials Research Society, Reno, NV (United States), APRIL 4, 1988
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
NITROGEN
ADSORPTION
SILICATES
ACOUSTIC TESTING
POROSITY
SORPTIVE PROPERTIES
SURFACE AREA
THIN FILMS
ADSORPTION ISOTHERMS
EQUATIONS
GELS
REFRACTIVITY
SOL-GEL PROCESS
SOLS
COLLOIDS
DISPERSIONS
ELEMENTS
FILMS
ISOTHERMS
MATERIALS TESTING
NONDESTRUCTIVE TESTING
NONMETALS
OPTICAL PROPERTIES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SILICON COMPOUNDS
SORPTION
SURFACE PROPERTIES
TESTING
360602* - Other Materials- Structure & Phase Studies