Accession Number : AD0282306

Title :   AGING CHARACTERISTICS OF QUARTZ CRYSTAL RESONATORS

Corporate Author : GEORGIA INST OF TECH ATLANTA ENGINEERING EXPERIMENT STATION

Personal Author(s) : BELSER,R.B. ; HICKLIN,W.H.

Report Date : 15 MAY 1962

Pagination or Media Count : 1

Abstract : The measurement accuracy and resonator stabilities obtained have directed attention to oven temperature control and oven design as the principal remaining areas wherein improvements must be made for attainment of maximum resonator stabilities. Problems encountered are associated with large ovens where heat losses, entry recovery, and frequency versus position differences cause significant variations in frequency measurements for a given resonator. Measurement of Q for resonators fabricated, made for the series mode of operation, has given values in the range 100,000 to 300,000. Resonators previously fabricated have continued to exhibit excellent stabilities within the limitations of the measurement and temperature control facilities. Mounting of resonators in the HC-27/U glass container is now giving excellent yield (about 90%). Ag plated units did not survive heat requirements for sealing.

Descriptors :   *QUARTZ, *QUARTZ RESONATORS, AGING (PHYSIOLOGY), ALUMINUM, CONTROL, CRYSTAL OVENS, CRYSTALS, DESIGN, FREQUENCY, FREQUENCY STABILIZERS, GAMMA RAYS, GOLD, MEASUREMENT, PLATING, RADIATION EFFECTS, SEALS (STOPPERS), SILVER, STABILITY, STORAGE, TEMPERATURE

Distribution Statement : APPROVED FOR PUBLIC RELEASE