ABSTRACT A new miniaturized design of the thermosensitive quartz resonator (TSQR) using an NLC cut (yxl/-31° 30′) with a fundamental frequency of 29.3 MHz was created in the Acoustoelectronics Laboratory of ISSP-BAS for use in a wide temperature range (4.2 K to 450 K) as highly sensitive quartz temperature sensors (QTS).
This paper presents the results of the investigations of the short- and long-term frequency stability of QTS. The short-term frequency stability of QTS was measured for averaging times up to 150 s at three constant temperatures: liquid helium (4.2 K), liquid nitrogen (77 K), and melting ice (0°C). The short-term frequency stability is 6.8∗ 10-9 at 0°C for t = 15 s, which permits a temperature sensitivity of 2∗ 10-4 K.
The long-term stability (aging) was investigated at room temperature and at 80°C for 500 days. The aging characteristics at 25°C and 80°C are compared. It was observed that the frequency change does not exceed 5∗ 10-7 after the 25th day of accelerated aging at 80°C. This guarantees a reliable operation of the sensor, without additional calibration, for several years.
Digital Object Identifier 10.1109/TUFFC.2008.838
© 2008, by The Institute of Electrical and Electronics Engineers, Inc. All rights reserved.