MatMeas Quasi-Static Measurement of the Longitudinal Piezoelectric Strain Constant d33
Testing Function
Longitudinal piezoelectric coefficient d₃₃: The same low-frequency alternating force is applied simultaneously to the test specimen and the internal reference specimen. Due to the direct piezoelectric effect, transverse piezoelectric charges are generated on the polarized electrode surfaces of the test specimen, while longitudinal piezoelectric charges are generated on the polarized electrode surfaces of the internal reference specimen. The two piezoelectric charge signals are converted into two piezoelectric voltage signals through their respective parallel capacitors.
Testing Principle
Testing Conditions
1. Test Parameter: d₃₃
2. Measurement Range: X1 Range (10–2000) × 10⁻¹² C/N
X0.1 Range (1–200) Pc/N
3. Resolution: X1 Range 1 PC/N
X0.1 Range 0.1 PC/N
4. Alternating Force Frequency Range: ~100 Hz
5. Amplitude of Alternating Force: 0.25 N
Sample Requirements
1. Recommended Sample Dimensions: φ10 mm × 5 mm
2. Sample Mass: < 100 g
3. Sample Capacitance: < 0.01 μF
4. The two principal surfaces of the sample shall be coated with a metal layer to serve as electrodes. Polarization treatment shall be carried out along the thickness direction. After polarization, the storage time shall not be less than 2 hours. (BALAB Technology provides electrode coating services.)
Testing Standards
GB3389.4-82 Test Methods for the Performance of Piezoelectric Ceramic Materials — Static Measurement of the Longitudinal Piezoelectric Strain Constant d₃₃
Test Results
