Views: 93 Author: Site Editor Publish Time: 2023-05-10 Origin: Site
Low-temperature sintered piezoelectric ceramic material is a special functional material with piezoelectric effect and dielectric effect, which can convert mechanical energy into electrical energy or convert electrical energy into mechanical energy. The importance of these materials lies in their wide-ranging applications in sensors, radio devices, vibrators, and many other fields.
Low Temperature Sintered Piezoelectric Ceramic Material
Traditional piezoelectric ceramic materials require high-temperature sintering to achieve good performance, but this will lead to problems such as material shrinkage and deformation during sintering. The low-temperature sintered piezoelectric ceramic material can complete the sintering process at a relatively low temperature (usually below 1000°C), thereby avoiding the above-mentioned problems. In addition, the preparation process of low-temperature sintered piezoelectric ceramic materials is also simpler, energy-saving and environmentally friendly.
The main components of low-temperature sintered piezoelectric ceramic materials include lead zirconium titanate (PZT), lead zirconium barium titanate (BZT), lead strontium lead titanate (PST), etc. These materials are widely used in the fields of sound wave, ultrasonic wave, vibration sensor, pressure sensor, flow meter and so on. In addition, they can also be used to manufacture micro-motors, vibrators, ultrasonic transducers and other devices.
The classification of low temperature sintered piezoelectric ceramic materials
Chemical Composition
According to the chemical composition, it can be divided into PZT, BZT, PSN and other types.
Lead zirconium titanate (PZT) is one of the most common low-temperature sintered piezoelectric ceramic materials, which has high piezoelectric coefficient and good stability. Barium lead zirconate titanate (BZT) and lead strontium titanate (PSN) are also widely used in piezoelectric devices.
According to the crystal structure and phase composition, it can be divided into single-phase type and multi-phase type.
Single-phase materials refer to ceramic materials that contain only one crystal structure, such as pure PZT materials. The multiphase material includes two or more crystal structures, such as PZT-BT (bismuth barium titanate) material.
According to the preparation method, it can be divided into solid phase reaction method, sol-gel method, hydrothermal synthesis method and so on.
The solid-state reaction method is a traditional preparation method, which usually requires high-temperature sintering to obtain a perfect product. The sol-gel method is an emerging preparation method, which can complete the sintering process at a relatively low temperature. Hydrothermal synthesis is a commonly used method for preparing heterogeneous materials.
Low temperature sintered piezoelectric ceramic materials compared with traditional materials
Compared with traditional high-temperature sintered piezoelectric ceramic materials, low-temperature sintered piezoelectric ceramic materials have the following advantages:
Low-temperature sintering: Traditional high-temperature sintered piezoelectric ceramic materials require a long-term sintering process at high temperature, which easily leads to problems such as shrinkage and deformation of the material. The low-temperature sintered piezoelectric ceramic material can complete the sintering process at a relatively low temperature (usually below 1000°C), thereby avoiding the above-mentioned problems.
Energy saving and environmental protection: The preparation process of traditional high-temperature sintered piezoelectric ceramic materials consumes a lot of energy and resources, and some harmful gases will be generated during the sintering process. The preparation process of low-temperature sintered piezoelectric ceramic materials is more energy-saving and environmentally friendly.
The preparation of multi-phase materials is simple: the preparation of multi-phase materials by traditional high-temperature sintered piezoelectric ceramic materials requires precise temperature control and complex process flow. The low-temperature sintered piezoelectric ceramic materials can be prepared by a simple method of multi-phase materials.
Stable performance: The performance of low-temperature sintered piezoelectric ceramic materials is more stable, and it is not easily affected by external environments such as temperature and atmosphere, so it can be used in a wider range of applications.
However, low-temperature sintered piezoelectric ceramic materials also have disadvantages:
Relatively weak physical properties: Compared with high-temperature sintered piezoelectric ceramic materials, the physical properties of low-temperature sintered piezoelectric ceramic materials may be slightly worse, which may limit their use in certain application fields.
The low-temperature sintering process still needs to be perfected: Since the preparation process of low-temperature sintered piezoelectric ceramic materials is relatively new, it needs to be further improved and perfected to improve product quality and stability.
Applications of low temperature sintered piezoelectric ceramic materials
Vibration sensors: Low-temperature sintered piezoelectric ceramic materials can be used to manufacture vibration sensors, such as vibration sensors for automotive air-conditioning compressors, which can measure data such as vibration frequency and intensity.
Acoustic sensors: Low-temperature sintered piezoelectric ceramic materials can be used to manufacture acoustic sensors, such as ultrasonic detectors and flow meters, which can be used to monitor the speed and flow of water and airflow.
Pressure sensor: Low-temperature sintered piezoelectric ceramic materials can be used to manufacture pressure sensors, such as in medical equipment, industrial production control and other fields, which can measure pressure in real time.
Micro-Electro-Mechanical Systems (MEMS): Low-temperature sintered piezoelectric ceramic materials can be used to manufacture micro-electromechanical systems (MEMS), such as accelerometers, gyroscopes, etc. These devices are widely used in smartphones, car navigation systems, and more.
Ultrasonic transducers: Low-temperature sintered piezoelectric ceramic materials can be used to manufacture ultrasonic transducers, such as medical imaging equipment and cleaners. These devices can convert electrical energy into mechanical energy and sound waves, and enable the detection and processing of substances.
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