Title :
Research aimed at designing a miniature ruggedized configuration of BVA-type crystal unit
Author :
Karaulnik, A.E. ; Grouzinenko, V.B.
Author_Institution :
Sci. Res. Inst. "Fonon", Moscow, Russia
Abstract :
Results are presented which lead one to expect the creation of highly stable crystal units at 5 Mc, fifth overtone, having a configuration characterized by special methods of mounting the piezoelectric element and of making a double hermetical sealing for the latter. Experimental samples have been fabricated for which all the mounting and hermetical sealing operations were carried on within a single vacuum cycle. The Q-value of the samples reached 2.5 × 10 6, the frequency shifts were within (5.10-11-5.10 -12) per day. Crystal units of the configuration being reported have a volume of 3.5 cm3 and maintain their efficiency under the effect of vibrations up to 5000 Hz at accelerations up to 40 g
Keywords :
Q-factor; ageing; crystal resonators; frequency stability; mechanical strength; quartz; seals (stoppers); vibrations; BVA-type crystal unit; Q-value; SiO2; ageing; double hermetical sealing; efficiency; frequency shifts; mechanical strength; miniature ruggedized configuration; piezoelectric element; quartz crystal resonators; single vacuum cycle; vibration effect; Acceleration; Aging; Air gaps; Electrodes; Frequency; Oscillators; Production; Q factor; Stability; Surface finishing;
Conference_Titel :
Frequency Control Symposium, 1993. 47th., Proceedings of the 1993 IEEE International
Conference_Location :
Salt Lake City, UT
Print_ISBN :
0-7803-0905-7
DOI :
10.1109/FREQ.1993.367444
