Piezoelectric pump ceramics
Product Features
◉ High-Qm air-pump material (Type 42):
Qm up to 2000–2200, extremely low heat generation, stable during long-term operation; low εr (approximately 1000–1350) significantly reduces power consumption. Especially suitable for wearable blood pressure monitors, respiratory equipment, and gas circulation pumps.
◉ High-d33 liquid-pump material (Type 56, Type 57):
d33 up to 650–880 pC/N, large single-stroke delivery volume; with good thermal conductivity of the working fluid and non-resonant driving, ceramic heat generation is negligible.
◉ Precision microstructure control: grain size distribution of 2–2.5 µm after sintering, achieving both toughness and high stability.
◉ All ceramic material formulations are independently developed, with the capability to customize formulations for customers.
◉ PZT57 used in piezoelectric bimorphs has passed 1-billion-cycle reliability testing, with a pass rate above 99.9%.
Piezoelectric pumps use the piezoelectric effect to drive ceramic deformation, which in turn moves gas or liquid within the pump chamber. Depending on the working medium, they are typically categorized as:
Piezoelectric air pumps:
◉ Wearable blood pressure monitors
◉ Medical gas supply
◉ Electronics cooling and pneumatic pressure control
Piezoelectric liquid pumps:
◉ Smartphone liquid cooling
◉ Precision cooling
◉ Medical infusion
◉ Microfluidic control
Piezoelectric pump ceramics – comparison
◉ Compared with conventional motor-driven micropumps, piezoelectric pumps offer clear advantages in structure, size, noise, service life, and energy efficiency:
Piezoelectric pump ceramics – overview
Different piezoelectric ceramic requirements for air pumps and liquid pumps:
◉ High-Qm materials (e.g., Type 42) are suitable for piezoelectric air pumps, maintaining low heat generation and low loss during high-frequency operation; a low dielectric constant also reduces driving current and power consumption, making them ideal for wearable blood pressure monitors.
◉ High-d33 materials (e.g., Type 56, Type 57) are suitable for liquid-cooling pumps, providing large single-stroke flow; with good thermal conductivity of the liquid and low driving frequency, ceramic heat generation is negligible, enabling stable long-term operation.
Piezoelectric pump ceramics – inspection items & key parameters
Power ultrasonic ceramics
PZT-8: 134 °C, 100 thermal shock cycles, no performance degradation. Ultrasonic surgical scalpel minimum amplitude 21 µm.
PZT-4: Qm > 2000.
Strong full-process-chain quality controllability: minimal performance variation between material batches; Curie temperature ≥ 310 °C.
Ultrasonic surgical scalpel vs. conventional surgical scalpel — comparison
Specialized ceramics for ultrasonic surgical scalpels – performance requirements
◉ Piezoelectric ceramics for ultrasonic surgical scalpels must meet three core requirements: high conversion efficiency, high stability, and high reliability.
◉ High-Qm piezoelectric ceramics (Type 81, Type 82, Type 42) provide better tolerance to high electric fields and high mechanical stress with low internal loss, and are commonly used in ultrasonic surgical scalpels requiring high-power output.
◉ Type 42 piezoelectric ceramic features a high electromechanical coupling coefficient.
