Curie Temperature (Tc) Measurement (DMS-1000 / DMS-2000)

Piezoelectric ceramics exhibit the piezoelectric effect only within a certain temperature range. There exists a critical temperature Tc; when the temperature exceeds Tc, a structural phase transition occurs in the piezoelectric ceramic. This critical temperature Tc is referred to as the Curie temperature.

When the temperature exceeds the Curie temperature (Tc), piezoelectric ceramics enter the paraelectric phase, and both spontaneous polarization and piezoelectric properties disappear. At the Curie temperature, many physical properties of piezoelectric ceramic materials—such as permittivity, heat capacity, and the coefficient of thermal expansion—undergo abrupt changes. Therefore, determining the temperature corresponding to this abrupt change allows the Curie temperature of the piezoelectric ceramic material to be identified. The Curie temperature can be determined by detecting the abrupt change point of the sample permittivity, and it is recommended that an impedance analyzer be used to measure this transition point.

1. Measurement Error: ±1%
2. Impedance Analyzer Measurement Error: ±1%
3. Temperature Control Accuracy: ±0.5 °C
4. Heating/Cooling Rate: 1 °C/min – 10 °C/min, recommended 2–3 °C/min

1. Recommended Dimensions: φ20 mm × 1 mm
2. The specimen should be an unelectroded, unpoled thin sheet with electrodes (electrode coating service available).
3. The specimen should be kept clean and dry.

GB/T 3389-2008 Test Methods for Properties of Piezoelectric Ceramic Materials — Measurement of Performance Parameters