ECS-JG Automatic Four-Probe Powder Resistivity & Conductivity & Compaction Density Tester, EJGAFPPRCCDT

An Automatic Four-Probe Powder Resistivity, Conductivity, and Compaction Density Tester replaces manual screw presses with software-controlled servo/hydraulic actuation, precision thickness sensors, and automated data logging. Where manual units rely on operator intuition and single-point measurements, fully automatic platforms measure resistivity, conductivity, and compaction density simultaneously across multi-step pressure profiles in a single test run.

The general automatic workflow: (1) Sample Loading & Mass Input: Weigh the dry powder sample ( 0.2 to 2.0 g) and enter the mass into the control software. Place the powder into the insulated mold die equipped with four-point probe contact pins. (2) Program Test Profile: Select the testing protocol: multi-step pressure holding (e.g., 10 to 200 MPa in 20 MPa increments), continuous constant-speed loading, or pressure-release springback cycles. (3) Automated Execution: The motorized actuator drives the ram downwards. At each pressure step, the system holds load, applies a precision DC current, reads micro-voltages, and logs real-time sample height. (4) Data Curve Generation: The software plots real-time curves: Resistivity vs. Pressure, Conductivity vs. Compaction Density, and Pressure vs. Thickness (Springback).

References

X. Ji, et al., High yield production of 3D graphene powders by thermal chemical vapor deposition and application as highly efficient conductive additive of lithium ion battery electrodes, Carbon, 2021, 176, 21-30.

G. J. Lian, et al., Probing carbon black deagglomeration in lithium-ion battery cathode manufacturing using powder resistivity metrics, Journal of Power Sources, 2025, 659, 238311