Piezoelectric Ceramics: Precision Components for Ultrasonic Transducers Sensors

Product Overview

Piezoelectric ceramics are advanced functional materials capable of converting mechanical energy into electrical energy and vice versa. Our high-performance piezoelectric ceramics are manufactured using sophisticated processes, ensuring exceptional quality and stability. These components are essential in applications requiring precise sensing, actuation, and ultrasonic energy generation.

Core Product Advantages

Our piezoelectric ceramics offer several key benefits that make them superior for a wide range of industrial and electronic applications:

High Electro-Mechanical Conversion Efficiency: Our piezoelectric ceramics exhibit excellent electromechanical coupling coefficients, ensuring highly efficient energy transfer between electrical and mechanical states for powerful output and sensitivity.

Superior Stability and Low Loss: Featuring low impedance, stable waveforms, and minimal dielectric loss, these components operate with low heat generation, enhancing reliability and longevity in continuous duty cycles.

Customizable Design and Versatility: Available in a wide range of standard sizes (from Ø8mm to Ø50mm) and frequencies (45kHz to 5MHz+), and offering both Side-Electrode and Wrap-Around Electrode configurations for flexible integration.

Robust Performance under High Load: Capable of handling significant mechanical and electrical loads, our piezoelectric ceramics are engineered for high-drive applications without sacrificing performance or lifespan.

Types of Conventional Products

• • Barium Titanate Piezoelectric Ceramics
• • Perovskite-Structure Piezoelectric Ceramics
• • Lead Zirconate Titanate (PZT) Binary-System Piezoelectric Ceramics
• • Composite Perovskite-System Piezoelectric Ceramics
• • Common Types of Piezoelectric Ceramics
• • Tungsten Bronze-Type Piezoelectric Ceramics
• • Lead Metaniobate Piezoelectric Ceramics
• • Lead Barium Metaniobate Piezoelectric Ceramics
• • Lead Barium Sodium Lithium Niobate-System Piezoelectric Ceramics
• • Bismuth-Containing Layered-Structure Piezoelectric Ceramics

Technical Specifications

The following table outlines the key parameters for our standard piezoelectric ceramic discs and rings:

Manufacturing Process

Process Overview
The manufacturing process of piezoelectric ceramics is quite similar to that of conventional ceramics. In addition to the standard ceramic processes such as batching, ball milling, filtration, binder removal, and sintering, piezoelectric ceramics require two additional steps: electrode deposition and poling.

Electrode Deposition
Definition: Electrode deposition involves applying a highly conductive silver film with strong adhesion onto the sintered ceramic body to serve as an electrode. Prior to this step, the surface of the fired ceramic is typically subjected to coarse and fine grinding, as well as polishing. This surface treatment aims to remove protrusions and ensures a tighter bond between the electrode and the ceramic body.
Purpose: Firstly, the electrode acts as a carrier for charge transmission. Secondly, it prepares the ceramic for the subsequent poling process.

Poling
Definition: Poling is the process of aligning the internal domains within the piezoelectric ceramic under the influence of an electric field, transforming the domain orientation from random to aligned.
Purpose: The purpose of poling is to cause the ferroelectric domains in the piezoelectric ceramic to align along the direction of the applied electric field. This changes the material from an initially isotropic state to an anisotropic one, thereby activating the piezoelectric effect.

Electrode Deposition

• Definition: Electrode deposition refers to the process of applying a highly conductive silver film with strong adhesion onto the fired ceramic surface to serve as an electrode. Prior to this step, the sintered ceramic typically undergoes coarse and fine grinding, as well as polishing, to remove surface protrusions and ensure tighter bonding between the electrode and the ceramic body.
• Purpose: First, to utilize the electrode as a carrier for charge transmission; second, to prepare the ceramic for the subsequent polarization process.

Polarization

• Definition: Polarization is the process of aligning the internal domains of piezoelectric ceramics under an electric field, transforming the domains from an isotropic to an anisotropic state.
• Purpose: To enable the ferroelectric domains in the piezoelectric ceramic to orient directionally along the applied electric field, transitioning from isotropy to anisotropy, thereby exhibiting the piezoelectric effect.

Application Fields

Our piezoelectric ceramics are critical components in numerous high-tech industries and devices:

• Ultrasonic Equipment: Powering ultrasonic cleaners, ultrasonic welding systems, and medical ultrasonic transducers for dental scalers (e.g., 20kHz, 35kHz, 105kHz rings).
• Sensing & Monitoring: Used in precision sensors, ultrasonic flow meters, non-destructive testing, and level detection systems.
• Medical & Beauty Instruments: Essential for medical B-ultrasound imaging, therapeutic devices, and beauty apparatus for targeted treatment.
• High-Power Acoustics: Deployed in sonar projectors and underwater acoustic transducers for marine applications.
• Precision Actuation & Spraying: Utilized in micro-drives, valves, precision spraying systems, and nebulizers for consistent and controlled fluid dispersion.

Leveraging decades of expertise in material science and manufacturing, from precise powder preparation and sintering to meticulous poling, we deliver piezoelectric ceramics that meet the most demanding specifications. We welcome custom orders for specific dimensions, frequencies, and electrode configurations to integrate seamlessly into your unique applications, including ultrasonic transducers, sensors, and various therapeutic and industrial tools.