Accession Number : ADD012656

Title :   Lead Zirconate Titanate Ceramics.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Walker,Basil E , Jr

Report Date : 02 Dec 1986

Pagination or Media Count : 5

Abstract : Lead zirconate titanate ceramics comprise from about 92 to 99.0 weight percent of lead zirconate and lead titanate in ratio from 0.505 to 0.54:0.495 to 0.46 respectively from about 0.5 to about 2 weight percent of one or more fluorides or chlorides of an alkali metal or alkaline earth except francium or radium, and 0.5 to 6 weight percent of one or more oxides of magnesium, barium, chromium, scandium, aluminum, lanthanium, praesodymium, neodymium or samarium. The cermic after pressing is annealed at a temperature from about 1050 to 1350 C. Ceramic elements made from the above ceramics are useful as sonar and microphone transducers.

Descriptors :   *PATENTS, *CERAMIC MATERIALS, *LEAD TITANATES, *ZIRCONATES, ALKALI METALS, ALUMINUM, FLUORIDES, TITANATES, BARIUM, CHROMIUM, FRANCIUM, MICROPHONES, TRANSDUCERS, MAGNESIUM, NEODYMIUM, RADIUM, OXIDES, SAMARIUM, SONAR, SCANDIUM

Subject Categories : Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE