When selecting a high-voltage polarization device suitable for bulk materials, the following factors should be considered:

1. Material type and physical form

The type of material and its geometric shape are the primary basis for equipment selection. For dense materials such as bulk piezoelectric ceramics and ferroelectric single crystals, if the polarization process needs to be carried out under high temperature conditions, it is recommended to use a polarization system with heating function. The oil bath polarization device can provide a uniform temperature field and a stable electric field environment, which helps to improve polarization consistency and domain structure orientation. For room temperature polarization without high temperature requirements, a multi-channel high-voltage polarization device with temperature controlled electrode plates can be selected.

2. Polarization quality control requirements

Electric field stability and uniformity: The polarization effect is highly dependent on the stability of the external electric field. Adopting a linear high-voltage direct current power supply (Huace HV series) with low ripple (≤ 0.02%) and high long-term stability (≤ 0.016%), the electric field fluctuates to ensure the repeatability and controllability of the polarization process.

Temperature control accuracy and uniformity: For piezoelectric/ferroelectric materials with temperature requirements, the deviation of polarization temperature will significantly affect the residual polarization strength. The oil bath method, due to its high heat capacity and uniform heat transfer, can usually achieve temperature field uniformity better than ± 1 ° C; The multi-channel device that integrates electrode plate heating and PID closed-loop temperature control can also achieve a temperature control accuracy of ± 0.5 ° C.

3. Budget and cost-effectiveness

The high voltage polarization equipment (Huace series) can meet most scientific research and pilot testing needs in terms of performance indicators (voltage range, ripple, temperature control accuracy, channel number, etc.), and has advantages in procurement cost, after-sales service, and local adaptation.

4. Protection and system reliability

High voltage polarization involves dual risks of high voltage and high temperature. The equipment is equipped with protective mechanisms, including but not limited to overvoltage protection, overcurrent protection, over temperature alarm, short circuit automatic cut-off, high voltage automatic discharge, and operation door interlocking.