Accession Number : AD0714229

Title :   Physical Properties of Sonite.

Descriptive Note : Final rept., 12 Sep 69-30 Apr 70,

Corporate Author : JOHNS-MANVILLE RESEARCH AND ENGINEERING CENTER MANVILLE N J

Personal Author(s) : Jabin,Arnold E.

Report Date : 27 APR 1970

Pagination or Media Count : 132

Abstract : Sonite, a highly porous, particulate, fiber-reinforced, ceramic material used in acoustics, was studied to: acquaint potential users with methods of handling and fabrication; determine useful mechanical, electrical and acoustic properties. Sonite is a solid material which is capable of being handled and fabricated into intricate shapes and parts, with a modest amount of care, using conventional techniques. Tested under various load conditions, the product, after being 'prestressed,' exhibited basically elastic mechanical-acoustical properties, up to the 'prestress' limit. The velocity of sound propagation and the acoustic impedance were both linear and of very low magnitude when compared with water. The above mentioned properties were not affected by variations in temperature lower than ambient (4-30C). Sonite also showed a low modulus of elasticity and a low mechanical damping capacity for a ceramic material of high porosity. (Author)

Descriptors :   (*COMPOSITE MATERIALS, ACOUSTIC PROPERTIES), ELECTRICAL PROPERTIES, MECHANICAL PROPERTIES, MANUFACTURING, MACHINING, CERAMIC MATERIALS, FIBERS, REINFORCING MATERIALS

Subject Categories : Laminates and Composite Materials
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE