Temperature characteristics of β‐phase quartz resonators and their application to accurate temperature sensors in high‐temperature region

Uno, Takehiko; Tashiro, Hiroyuki; Noge, Satoru

doi:10.1002/ecj.10415

Cited by 3 publications

(1 citation statement)

References 9 publications

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“…By switching between the reference and measuring inductance, the quartz crystal non-linear self-temperature frequency characteristics as well as parasitic influences of the converter electronic circuit are compensated. An additional advantage of the proposed method—when comparing the temperature stability during the temperature changes in the range between 0–40 °C to other methods [15,16,17]—is that no temperature sensor is needed.…”

Section: Introductionmentioning

confidence: 99%

Highly Enhanced Inductance Sensing Performance of Dual-Quartz Crystal Converter

Matko

Milanovič

2019

Sensors

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This paper presents ways of inductance sensitivity improvement in a quartz crystal converter for low inductance measurement. To improve the converter’s sensitivity, two quartz crystals that were connected in parallel and additional capacitance connected to the two quartz crystals in the oscillator’s circuit are used. The new approach uses a converter with special switchable oscillator and multiplexer switches to compensate for the crystal’s natural temperature-frequency characteristics and any other influences, such as parasitic capacitances and parasitic inductances, which reduce them to a minimum. The experimental results demonstrate improved sensitivity and well-compensated dynamic temperature influence on the converter’s output frequency. The fundamental quartz crystal frequency-temperature characteristics in the temperature range between 0–40 °C are simultaneously compensated. Furthermore, the converter enables the measurement of the influence of its own hysteresis at different values of inductances at the selected sensitivity by parallel capacitances connected either to the single- or dual-quartz crystal unit. The results show that the converter converting inductances in the range between 85–100 μH to a frequency range between 1–150 kHz only has ±0.05 ppm frequency instability (during the temperature change between 0–40 °C), which gives the converter a resolution of 1 pH. As a result, the converter can be applied where low inductance measurement, nondestructive testing, impedance change measurement, and magnetic material properties measurement are important.

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Section: Introductionmentioning

confidence: 99%

Highly Enhanced Inductance Sensing Performance of Dual-Quartz Crystal Converter

Matko

Milanovič

2019

Sensors

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High-temperature electromechanical loss in piezoelectric langasite and catangasite crystals

Suhak

Fritze

Сотников

et al. 2021

Journal of Applied Physics

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Temperature-dependent acoustic loss Q−1 is studied in partially disordered langasite (LGS, La3Ga5SiO14) and ordered catangasite (CTGS, Ca3TaGa3Si2O14) crystals and compared with previously reported CTGS and langatate (LGT, La3Ga5.5Ta0.5O14) data. Two independent techniques, a contactless tone-burst excitation technique and contacting resonant piezoelectric spectroscopy, are used in this study. Contributions to the measured Q−1(T) are determined through fitting to physics-based functions, and the extracted fit parameters, including the activation energies of the processes, are discussed. It is shown that losses in LGS and CTGS are caused by a superposition of several mechanisms, including intrinsic phonon–phonon loss, point-defect relaxations, and conductivity-related relaxations.

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Functional twin boundaries and tweed microstructures: a comparison between minerals and device materials

Aktas

Salje

2014

Mineral. mag.

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In ferroelastic materials, the existence of degenerate strain states leads to the formation of nanoscale microstructures, such as domain boundaries (twin walls) and tweed. As the symmetry properties of microstructures differ from those of the bulk, they may dramatically change the macroscopic properties of a crystal. In addition, they are likely to have functional properties (ferroelecricity, piezoelectricity, magnetism, conductivity and rapid chemical transport) that are absent in the bulk. The existence of functional properties of twin walls, along with the advances in nano-scale characterization, has opened the door to domain boundary engineering, which aims to use domain boundaries as active elements in device materials. Hence, this relatively new field puts ferroelastic twin walls and possibly tweed at the heart of future electronic devices. Ferroelasticity is very common among minerals. Similar to manmade materials, the same crystallographic principles apply, which means that there are many minerals that await discovery for their functional properties. Thus, this review aims to raise attention to the discovery of minerals with functional microstructures. The current development of functional twin boundaries and tweed structures in physics and materials sciences is compared with the traditional observation of such structures in minerals. With an emphasis on chemical transport and piezoelectric/ ferroelectric behaviour, examples of functional microstructures are given from both man-made materials and minerals in addition to a discussion of the origin of polar twin walls and the introduction of a recent experimental technique, resonant piezoelectric spectroscopy (RPS), for their discovery.

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Temperature characteristics of β‐phase quartz resonators and their application to accurate temperature sensors in high‐temperature region

Cited by 3 publications

References 9 publications

Highly Enhanced Inductance Sensing Performance of Dual-Quartz Crystal Converter

Highly Enhanced Inductance Sensing Performance of Dual-Quartz Crystal Converter

High-temperature electromechanical loss in piezoelectric langasite and catangasite crystals

Functional twin boundaries and tweed microstructures: a comparison between minerals and device materials

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