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Ceramic Materials
Traditionally, materials have been divided into three categories: metal, ceramic, and organic polymer. Metals are bonded by metallic bonds between atoms in the presence of free electrons. Organic polymers are mainly composed of nonmetallic atoms such as carbon, oxygen, hydrogen and silicon, which are bonded by covalent bonds and generally have no free electrons. Ceramic is a compound composed of metallic elements and non-metallic elements. The bond between atoms relies on ionic bonds, and its properties are between metal and polymer materials. Broadly speaking, ceramics refer to materials that are processed at high temperatures during the preparation process. Ceramics can be divided into two categories. One is structural ceramics, which mainly use mechanical and thermal functional properties of ceramics. The other category is functional ceramics, mainly using the thermal, electrical, optical, acoustic, magnetic, chemical, biological and other information detection, conversion, coupling, transmission and storage properties of ceramics. These include ferroelectric, dielectric, piezoelectric, semiconductor, superconducting, and magnetic materials. Functional ceramics are widely used in information detection, transformation, processing and storage and display. They are the key materials of basic components in information technology. They can sense light, distinguish odors, store information, or respond to mechanical deformation... . It is these special skills that make it have a wide and important application. Ceramic preparation process is generally similar, mainly including the following steps: batching - mixing - pre-burning - grinding - molding - molding - sintering - post-treatment (polarization, magnetization, etc.). Here are some of the main types of functional ceramics: 1. Piezoelectric ceramics: The so-called piezoelectric effect is that some of the media under the action of force, deformation, causing the surface of the medium charged, which is the positive piezoelectric effect. On the contrary, if an exciting electric field is applied, the medium will produce mechanical deformation, which is called inverse piezoelectric effect. This wonderful effect has been applied by scientists in many fields closely related to people's lives to achieve energy conversion, sensing, driving, frequency control and other functions. Its properties can be used for the following purposes: piezoelectric igniter, mobile X-ray power supply, shell detonator. Electronic lighters are made of piezoelectric ceramic flint, ignition number can be more than 1 million times. Piezoelectric ceramics can be used to convert electrical energy into ultrasonic vibration, which can be used to explore the position and shape of underwater fish, nondestructive detection of metal, ultrasonic cleaning, ultrasonic medical treatment, and can be made into a variety of ultrasonic cutters, welding devices and soldering irons, plastic and even metal processing. In addition, it can also be used to manufacture ultrasonic transducers, underwater acoustic transducers, electro-acoustic transducers, ceramic filters, ceramic transformers, ceramic frequency discriminators, high voltage generators, infrared detectors, acoustic surface wave devices, electro-optical devices, ignition devices and piezoelectric gyros. Superconducting ceramics (2) : in 1987, American scientists have discovered ybco superconducting performance on 98 k ceramic, opened up a road for the practical application of superconducting materials, superconducting research history important milestone in human. 3. Capacitor ceramics: Capacitor ceramics can store a large amount of electrical energy. At present, up to 10 billion ceramic capacitors are produced every year around the world to complete the memory function in computers. 4. Thermosensitive ceramics: Can sense the slight humidity change, used for temperature measurement and control. 5. Gas-sensitive ceramics: Gas-sensitive components can monitor, control, alarm and air regulate inflammable, explosive, toxic and harmful gases. 6. Photosensitive ceramics: resistors made can be used as photoelectric controls for automatic feeding, automatic exposure, and automatic counting. 7. Magnetic ceramics: part of the important information recording materials, but also can be made into permanent magnets for wind power generation and other fields. 8. There are also a number of other purposes such as semiconductor ceramic, insulating ceramics, dielectric ceramics, luminescent ceramics, sensitive ceramic, absorbing ceramics, laser ceramics, pottery, nuclear fuel propellant as ceramic, the solar energy light conversion ceramics, storage battery, damping ceramics, pottery and porcelain, ceramic solid biological technology, catalytic ceramic, special feature film, etc., in automatic control, instruments and meters, electronics, communications, energy, transportation, metallurgy, chemical industry, precision machinery, aerospace, defense and other departments shall play an important role. It takes the right materials to turn a great idea into a great product. Beijing Hulk technology can provide professional and rich ceramic powder materials, ceramic components and films. These products are widely and deeply used in electronics, energy, industrial engineering, automotive, aerospace and other fields. Some of our ceramic products are listed below. If you need other products, please feel free to contact us. 氧化物 Oxide:
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