Piezo ceramic disc

Buyers must prioritize Resonant Frequency (fr) and Electromechanical Coupling Coefficient (kp/kt) to ensure device efficiency. Additionally, check the Static Capacitance (C0) and Dissipation Factor (tan δ); a low dissipation factor is critical for preventing overheating in high-power applications. Ensure the Piezoelectric Charge Constant (d33) aligns with your sensitivity requirements for sensors or displacement needs for actuators.

Most industrial discs are made of Lead Zirconate Titanate (PZT). PZT-4 is ideal for high-power ultrasonic applications due to its low dielectric loss, while PZT-5A is better for sensors due to its high sensitivity and time stability. For eco-conscious markets, inquire about Lead-Free Piezo Ceramics (like KNN-based materials), though they may offer different performance profiles.

Ensure the products are RoHS and REACH compliant, especially since PZT contains lead (often covered by specific exemptions for electronic ceramics). Manufacturers should hold ISO 9001 certification for quality management. For medical or automotive applications, verify if the supplier follows ISO 13485 or IATF 16949 standards respectively.

These components are widely used in Ultrasonic Atomizers (humidifiers), Ultrasonic Cleaning Transducers, Buzzer Alarms, and Medical Imaging (Ultrasound probes). They are also essential in industrial Non-Destructive Testing (NDT) sensors and precision Micro-positioning stages.

The biggest risk is Physical Fragility and Depolarization. Piezo ceramics are brittle and can crack under mechanical stress or lose their properties if exposed to High Temperatures (exceeding the Curie Point) during transit. Always insist on Vacuum Packaging and shock-absorbent padding. Another risk is Frequency Drift, where the delivered batch does not match the sample's resonant frequency.

Focus on Batch Consistency. Request a Statistical Process Control (SPC) report for key parameters like frequency and capacitance. Negotiate for a Golden Sample to be kept by both parties for quality arbitration. For large volumes, aim for a 15-20% discount compared to prototype pricing, and clarify that the price includes Export-Standard Packaging.

Use Secured Payment services provided by Made-in-China.com to ensure funds are only released upon proof of shipment. Conduct a Third-Party Factory Audit if the order value is high to verify the supplier's testing equipment, such as Impedance Analyzers, which are vital for verifying piezo quality.

For small to medium batches, Air Freight (Express) is preferred to minimize handling time and environmental exposure. Ensure the shipment is marked as 'Fragile: Electronic Components'. For sea freight, use LCL (Less than Container Load) with palletization and Moisture-Proof Desiccants inside the crates to prevent electrode oxidation.