Accession Number : ADD017923

Title :   Making Aggregates and Articles Made Therefrom.

Descriptive Note : Patent Application, filed 15 Nov 95,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Kahn, Manfred ; Chase, Mark

PDF Url : ADD017923

Report Date : 15 Nov 1995

Pagination or Media Count : 16

Abstract : The process for making a porous mass containing dense aggregates or granules includes the steps of mixing powder with more than 10% by weight of a binder to form agglomerated powder, heating the agglomerated powder to remove the binder and to grow crystallites in the powder to an average diameter exceeding 5 microns to form a porous mass containing the dense aggregates, and cooling the porous mass. The porous mass is broken up, if it is cohesive, into the aggregates containing the crystallites and the aggregates can be used to make an article, such as a transducer. The transducer is essentially a thick film and its thickness is that of the ceramic aggregates of granules. The electrodes connect to the top and to the bottom of the aggragates. As a result, the transducer material operates in the 1-3 mode.

Descriptors :   *PATENT APPLICATIONS, *AGGREGATES(MATERIALS), *POROUS MATERIALS, POWDERS, MASS, COOLING, CERAMIC MATERIALS, ELECTRODES, HEATING, HIGH DENSITY, TRANSDUCERS, MIXING, BINDERS, THICK FILMS, GRANULES

Subject Categories : Miscellaneous Materials
      Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE