Thermally Stimulated Depolarization Current (TSDC) Testing
Technical Specifications & Test Capabilities
| Parameter / Metric | Specification Range & Accuracy | Operational Notes |
|---|---|---|
| Temperature Range | -160°C to 450°C | Linear heating rates from 0.5 to 10°C/min |
| Current Detection Range | 0.1 pA to 10 mA (Sub-pA resolution) | Femtoampere-level electrometer amplifier |
| In-Situ Poling Voltage | ±100 V to ±1000 V (Expandable to ±5 kV) | In-situ high-temperature electric field alignment |
| Analytical Deliverables | Depolarization current spectrum, Trap energy depth, Pyroelectric Pi | Initial rise and peak shape fitting |
Specimen Geometry & Preparation Guide
| Material Form | Recommended Dimensions | Dimensional Limits | Electrode & Poling Notes |
|---|---|---|---|
| Bulk Ceramics & Crystals | Diameter ≤ 30 mm, thickness ≤ 5 mm | Double-sided silvered | External or in-situ poling available |
| Polymer Films (PVDF, PTFE, Kapton) | Thickness 5–20 µm, sputtered Au Ø3–5 mm | Film 2D size slightly larger than electrode | High gold layer thickness (> 50 nm) for uniform current |
Testing Function
Thermally Stimulated Depolarization Current (TSDC / TSC) is an ultra-sensitive macroscopic probe of microscopic dipole relaxation, charge trapping, and defection energetics in dielectric, ferroelectric, and electret materials. By polarizing specimens at elevated temperatures, freezing dipoles at cryogenic levels, and measuring released picoampere depolarization currents during linear heating, this test reveals trap energy depths, relaxation time distributions, and true pyroelectric coefficients.
Testing Conditions
Primary Instruments: TSDC / CPS System
Standard Turnaround: Within 5 working days
Key Standards: ASTM D257 / IEC 62631 Standards for Dielectric Relaxation Characterization
Sample Requirements
Please review the detailed specimen dimensions, electrode requirements, and poling conditions in the table above. Custom dimensions and special sample geometry can be accommodated upon technical consultation.
Testing Standards
- ASTM D257 / IEC 62631 Standards for Dielectric Relaxation Characterization
Test Results
Clients receive comprehensive test reports with raw exported ASCII/txt data files, high-resolution curve plots (temperature spectra, impedance plots, or hysteresis loops), and experimental condition parameters stamped by our CMA accredited testing center.
Turnkey Equipment for Your Own Laboratory
Prefer in-house characterization? Every test in our laboratory is performed using MatMeas turnkey instruments. Verify measurement quality with sample testing before capital procurement.
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