In the capacitor industry, different capacitors have different uses, each has its own advantages, and widely used in mechanical equipment. However, there are many people do not quite understand the knowledge of capacitors, the following explanation of high-voltage ceramic capacitors.
Basic Knowledge About High-voltage Ceramic Capacitors
High-voltage ceramic capacitors, that is, the use of high-voltage ceramic capacitors in the power system, generally such as power system metering, energy storage, voltage divider and other products, will use high-voltage ceramic capacitors. High-voltage ceramic capacitors in the LED light industry has a wide range of applications and not light status, high-voltage ceramic capacitors is a high dielectric constant capacitor ceramic (barium titanate a titanium oxide) extruded into a round tube, disc or disk as a dielectric, and burned seepage method will be plated on the ceramic as the electrode made of silver.
The factors that affect the quality of high-voltage ceramic capacitors, in addition to the composition of the porcelain material, the optimization of process manufacturing, strict process conditions are very important. So consider the cost and purity of raw materials, choose industrial pure raw materials must pay attention to the applicability of raw materials. Strict control of the firing system, the use of excellent performance temperature control equipment and good thermal conductivity of the kiln furniture. Factors affecting the quality of high-voltage ceramic capacitors is not only the composition of the porcelain material, as well as process manufacturing optimization, strict process conditions are very important. So consider the cost and purity of raw materials, select industrial pure raw materials must pay attention to the applicability of raw materials.
The quality of the preparation of the melt has a great impact on the ball milling fineness and firing of ceramic materials When the synthesis temperature of the glass material is low, the synthesis is not sufficient. It is unfavorable to the subsequent process. If Ca2 remains in the synthesized material, if the synthesis temperature is high, if the frit becomes hard, it will affect the ball milling efficiency, the introduction of impurities in the grinding medium, the activity of the powder decreases, and the firing temperature of the porcelain increases. Molding to prevent uneven pressure in the direction of thickness, too many closed holes in the body if there are large air holes or flaking, will affect the electrical strength of the porcelain body. Strict control of the firing system, the use of temperature control equipment with excellent performance and good thermal conductivity of the kiln furniture.
The choice of packaging materials, packaging technology control, porcelain surface cleaning treatment has a great impact on the performance of the capacitor. Here to choose a good moisture-proof, close combination with the surface of the porcelain body, high-resistance packaging materials. At present, most of the epoxy resin, a few products also use phenolic resin sealing. There are also first coated with insulating varnish and then phenolic resin encapsulation method, to reduce costs have some significance. Powder packaging technology is commonly used in large production lines.
Multilayer ceramic capacitors are the most widely used chip components it is by the inner electrode material and ceramic blanks alternating parallel stacking, fired into one small size chip monolithic capacitors, high specific capacitance, high precision, can be mounted on printed circuit boards, hybrid integrated circuit substrate can effectively reduce the size and weight of electronic information terminal products, improve product reliability.
The Classification of High-voltage Ceramic Capacitors
Ceramics are divided into: Class I ceramic, Class II ceramic, Class III ceramic.
Class I ceramic: NP0, temperature characteristics, frequency characteristics and voltage characteristics of good, because the dielectric constant is not high, so the capacity to do not big;
Class II ceramics: X7R, temperature characteristics and voltage characteristics of the next best;
Class III ceramic: dielectric constant is high, so the capacity can be made very large, but the temperature characteristics and voltage characteristics are not very good. Porcelain capacitors are generally not very large. In addition, re-emphasize an important feature: porcelain dielectric capacitor breakdown, often in a short-circuit state. (This is its weakness) and film capacitors fail, generally open-circuit state.
The main role of high-voltage ceramic capacitors can eliminate high-frequency interference, most of which are used in negative ion products, lasers, X-ray machines, control and measurement equipment, high-voltage packages, igniters, generators, transformers, power equipment, voltage doubling modules, welding machines, electrostatic spraying, and other electromechanical equipment that requires high-voltage high-frequency.
The Advantages of High-voltage Ceramic Capacitors
1.Capacity loss with temperature and frequency with high stability.
2.Special series structure is suitable for high voltage and long-term reliability.
3.High current creepage rate and suitable for high current circuit non-inductive structure.
The Difference Between High-voltage Ceramic Capacitors And Safety Capacitors
The key effect of high-voltage ceramic capacitors is to remove high-frequency interference, most of which are used in negative ion products, lasers, x-ray machines, control and measurement equipment, high-voltage packages, igniters, generators, transformers, power engineering, voltage doubling control module, two bonded welders, electrostatic powder coating, and other machinery and equipment that must be high-frequency high-voltage. It has the following characteristics:
1.Volume loss with temperature frequency and high reliability.
2.Unique series structure is suitable for high working voltage and reliability in long-term work.
3.High electric flow lifting speed and suitable for large electric flow control circuit contact type structure.
Safety capacitors are capacitors that have to be verified according to electrical safety, usually including X-capacitors and Y-capacitors. The key is to have insulation level consideration.
High-voltage ceramic capacitors are just normal ordinary capacitors that are not approved by safety regulations, so they cannot be used before rectification, nor can they be connected across the right insulation requirements on both sides, such as the first and second sides of an AC-DC architecture, which can only be put into a Y-CAP.
Where to Buy Reliable High Voltage Ceramic Capacitor?
UF Capacitors is an ISO9001-certified manufacturer in China, founded in 1995. We hold military qualifications for tantalum
capacitors, MLCC, and other products. Additionally, we have a UL-recognized test laboratory located at our factory site.
Our marketing position is to provide a superior alternative to first-tier brands such as TDK, Murata, AVX, EPCOS, Vishay,
and Panasonic. We offer similar quality but at better prices, with faster lead times and excellent service. With extensive
experience working with renowned international companies like GE, Philips, Jabil, and Flex, we have built a strong reputation.
UF Capacitors serves the consumer electronics, computing, communications, and industrial markets. As a professional Chinese electronic components manufacturer, we are dedicated to delivering high-quality electronic components, exceptional management, strict quality control systems, and excellent sales service. We strive to foster mutually beneficial partnerships
and drive business growth.
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