Production of Distorted 3-3 Hydrophone Composites from Reticulated Ceramics

摘要

Reticulated ceramics have been in production for over 20 years, primarily formolten metal filter applications. Annually, hundreds of thousands of square feet are produced with prices ranging down to twenty cents per cubic inch for some materials. This work was undertaken to apply reticulated ceramic processing techniques to piezoelectric ceramic-composite production and the subsequent production, testing, and evaluation of six hydrophone arrays. This first generation composite material is a rugged, distorted 3-3 piezoelectric ceramic composite with appreciable acoustical properties. Modeling results suggest that simple modifications will bring about enhanced sensitivities and acoustics. Sensitivity limits are imposed by the need to maintain strength at high pressures. Processing details are given in the Manufacturing Report, also delivered as part of this contract. Suggestions for an improved second generation material are presented. Composite costs are projected to be under $10/square inch in moderate volumes.