Accession Number : AD0475600

Title :   CERAMIC RESONATOR MATERIAL FOR I.F. FILTERS.

Descriptive Note : Quarterly progress rept. no. 2, 1 Jun-31 Aug 65,

Corporate Author : GENERAL ELECTRIC CO SYRACUSE NY ELECTRONICS LAB

Personal Author(s) : Dietz, J. P. ; Willis, W. L.

Report Date : 31 AUG 1965

Pagination or Media Count : 31

Abstract : Compositional studies described in the First Quarterly Report were continued. Two different tasks are discussed: (1) The improvement of the resonant frequency-temperature characteristics, fr(T), characteristics of the 'zero' coefficient materials, compositions ranging from Pb(0.60)Ba(0.40)Nb206 to Pb(0.54)Ba(0.46)Nb206. These were synthesized by making blends of the calcined single phase end members. The object being to attain the appropriate balance of phases in the final specimen to yield a flat fr(T) characteristic. (2) The substitution of Sr for Ba in Pb(0.70)Ba(0.30)Nb206 was made to this high Qm composition to improve the fr(T) characteristics by increasing the Curie temperature. Problems in repeating Qm compositions impeded this study. A computer program for calculation and tabulation of results from experimental data was developed. (Author)

Descriptors :   *CERAMIC MATERIALS), (*RESONATORS, (*FERROELECTRIC MATERIALS, RESONATORS), NIOBATES, LEAD COMPOUNDS, BARIUM COMPOUNDS, THERMAL EXPANSION, RESONANT FREQUENCY, STABILITY, THERMAL PROPERTIES, PHASE STUDIES, STRONTIUM, COMPUTER PROGRAMMING, INTERMEDIATE FREQUENCIES.

Subject Categories : Electrical and Electronic Equipment
      Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE