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Boron Nitride Sealing Ring, Vacuum Gasket, High Temperature Protection Ring

Due to its excellent performance, boron nitride ceramic sealing rings are widely used in various industrial fields with strict high temperature, corrosion and sealing requirements.

1. Automotive industry: Boron nitride ceramic sealing rings can be used in high-temperature/high-pressure and corrosive environments of automobile engines to improve sealing performance and reduce energy loss.
2. Aerospace industry: Boron nitride ceramic sealing rings can be used in high-temperature/high-pressure and corrosion-resistant environments such as turbine components, jet engines and aerospace instruments.
3. Chemical industry: Boron nitride ceramic sealing rings can be used in chemical equipment/pipeline connections and pump valve seals, providing good corrosion resistance and long life.
4. Vacuum technology: Boron nitride ceramic sealing rings can be used in sealing devices of vacuum equipment because it has good sealing performance and high temperature stability.

How To Solve The Problem Of Insufficient Heat Dissipation Of Ceramic Substrate In Thermoelectric Cooler

Thermoelectric cooling is a new technology that has the potential to revolutionize the way things are kept cold, whether it is food, wine, beer or cigars. In fact, it is a completely different approach to refrigeration from standard compressors.

As we know that ceramic substrate plays a vital role in the thermoelectric cooler, the top and bottom of thermoelectric cooler(TEC) are ceramic substrate, which play the role of electrical insulation, heat conduction and support. And the biggest problems for the TEC is the heat dissipation.
To solve this problem it the top concern.

As different ceramic materials have different electronical and chemical properties. For example, the thermal conductivity of alumina is ≧24W/M.K, and the thermal conductivity of aluminum nitride is ≧170W/M.K. After the TEC is connected with the current, the temperature difference is generated due to the Parr effect, and the resistance encountered in the process of heat transfer inside the ceramic base is called the thermal conductivity resistance. The thermal resistance experiment shows that Al>Al2O3>Cu>AlN, aluminum nitride substrate has the lowest thermal resistance and the best thermal conductivity.
And the aluminum nitride substrate with thinner plate thickness has smaller thermal resistance.
The best choice is to use aluminum nitride substrate instead of alumina.

How to use Alumina Ceramic Tubes for long-term use

Alumina ceramic is widely applied in the high-temperature industry because of its excellent resistance to high temperatures. It can withstand high temperatures up to 1800℃, in addition to its stable chemical properties, high mechanical strength, and electrical insulation. So Alumina ceramic tube is commonly used in high-temperature furnaces, thermocouples tubes, insulating tubes, and corona electrode’s square ceramic tubes. In this articles, we would like to discuss how to use alumina ceramic tubes at high temperatures to ensure optimal performance and longevity.

1. Proper handling and storage
Alumina tubes are brittle, avoid any sudden impacts or shakes to prevent breakage. During storage, it should be stored in a dry and clean environment to prevent contamination.
2. Preheating
When using alumina tubes, we should be preheated gradually, the heating rate should be controlled at 5 degrees per minute until it reaches the desired temperature, the slower the better.
3. Cleaning
Before using aluminum oxide tubes, it is important to clean them thoroughly to remove any impurities or residue. Any foreign matter on the surface of the tube may cause contamination or blockage during use. A combination of solvents, detergents, and/or acid solutions can be used to clean the tubes. After use, don’t leave some samples in the tube to avoid chemical reactions that may cause the alumina tube to crack.
4. Heating
When placing or removing the sample, do not exceed 150 degrees and move slowly from the edge to the center. Placing or removing samples at high temperatures is the main cause of alumina tube breakage. Do not touch the high temperature furnace tube with low temperature objects. Repeated thermal cycling can stress the aluminum oxide tubes, causing them to crack or even fail completely. So it is recommended to use the alumina tube at a steady temperature without any sudden changes.
5. Cool down
After use, it is important to cool the aluminum oxide tube slowly to avoid thermal shock. Rapid cooling can cause the tube to crack or even fail completely. It is recommended controlled at 5 degrees per minute until it reaches room temperature.

In conclusion, proper handling, preheating, cleaning, heating, and cooling are essential to ensure optimal performance and longevity of the tube.

Ceramic Metallized Technology, A Strong Combination Of Ceramics And Metals

With the development of intelligent devices in the direction of digitalization, miniaturization, low energy consumption, multifunctionalization, high reliability, etc., the closely related electronic packaging technology has also entered a period of ultra -high -speed development.
Commonly used electronic packaging substrate materials include three categories: organic packaging substrate, metal base composite substrate, and ceramic packaging substrate. With the evolution of intelligent devices, traditional substrate materials can no longer meet the current needs of the current development. Therefore, the base board materials are evolved from organic materials, metal materials, and evolution to ceramic materials.

As we all know, ceramic materials have many advantages compared to traditional substrate materials:
1. Low communication loss – The dielectric constant of the ceramic material itself makes the signal loss smaller.
2. High thermal conductivity – the heat on the chip is directly transmitted to the ceramic sheet. There is no need for insulating layer to achieve relatively better heat dissipation.
3. The more matched thermal expansion coefficient -the thermal expansion coefficient of ceramics and chips is close, and it will not cause too much deformation when the temperature difference drama changes causes the problem of line welding and internal stress.
4. High-temperature resistance – Ceramics can withstand a high and low temperature cycle with large fluctuations, and can even operate normally at a high temperature of 500-600 degrees.
5. High-electricity insulation – Ceramic material itself is an insulating material, which can withstand high breakdown voltage.
6. High chemical stability – Ceramic materials can be etched with acid, alkali, and organic solvents during processing.
7. High mechanical strength – The ceramic material itself has a good mechanical strength and good stability
Therefore, ceramic materials have gradually developed into an ideal packaging substrate for new generation of integrated circuits and power electronic modules. The current commonly used ceramic substrate materials include Al2O3, AlN, and SI3N4. Ceramic metallized technology has also received extensive attention and rapid development.
Finally, ceramic metallization process is as follows:

Mass Spectrometer Filament Assembly

We are pleased to introduce here our new product Filament Assembly supports, which is a drop-in replacement filament for ion trap mass spectrometers. Direct replacement for products offered by Thermo, Varian, Perkin-Elmer, Teledyne and Hitachi. Customers can choose from two-pin and four-pin options, tensioned and aligned to maximize mass spectrometer performance. These filament assembly are manufactured from our alumina ceramic, chosen for its good electrical insulation and high temperature stability.

Innovacera’s brazing process makes the filament more resistant to temperatures of around 700°C, compared to standard adhesives that typically can only withstand temperatures up to 350°C.

Welding method

Ceramic to Metal Brazing (or Soldering)
Glass to Metal Sealing

If you are interested, please contact us. Our experienced team of engineers will select the appropriate brazing fixture, joint design and process for your application.

Pyrolytic Graphite Coated PBN Crucible for Electron Beam Evaporation

Pyrolytic graphite coated PBN (pyrolytic boron nitride) crucible refers to a crucible made of PBN material with a coating of pyrolytic graphite on its surface. The purity of Pyrolytic Graphite Coated Crucible is over 99.99% and the air tightness is good, which has high-temperature resistance, chemical stability, good thermal shock resistance, good thermal conductivity, low coefficient of thermal expansion, resistance to acid, alkali, salt, and organic reagent corrosion. In addition, it has a long service life.

By coating a PBN crucible with a layer of pyrolytic graphite, several advantages can be achieved:
1.Enhanced thermal conductivity: The pyrolytic graphite coating improves the thermal conductivity of the PBN crucible, allowing for efficient heat transfer during high-temperature processes.
2.Chemical resistance: The PBN material already exhibits exceptional chemical inertness, and the additional pyrolytic graphite coating further enhances its resistance to corrosive substances, ensuring greater durability and lifespan of the crucible.
3.Non-wetting properties: Pyrolytic graphite has a non-wetting surface, meaning it repels and does not absorb liquids. This property prevents molten materials from sticking to the crucible, facilitating easy removal and preventing contamination.
4.Electrically insulating: PBN itself is an excellent electrical insulator, and the pyrolytic graphite coating maintains the insulating properties of the crucible. This trait is valuable in electrical and electronic applications, where electrical isolation is necessary.
5.Reduced thermal stress: The combination of PBN and pyrolytic graphite helps reduce thermal stress caused by temperature variations, extending the crucible’s lifespan.
Pyrolytic graphite coated PBN crucibles are commonly used in high-temperature applications, such as semiconductor manufacturing, crystal growth, metallurgical processes, and materials research, where both high thermal stability and chemical resistance are critical.

What’s The Differences Between Alumina Ceramic And Zirconia Ceramic

Alumina is a very common technical ceramic material. Zirconia is also widely used in machinery industries. As an advanced ceramics manufacturer, we’d like to introduce the differences between alumina ceramic and zirconia ceramic.

In terms of performance:
1.The density of zirconia ceramics is twice that of alumina ceramics, the bulk density of zirconia is 6.05g/cm3, while that of alumina is only 3.7g/cm3. So zirconia has better compressive properties in comparison.
2.The toughness of zirconia ceramics is 4 times that of alumina ceramics. The toughness of the zirconia ceramic is excellent, which overcomes the inherent brittleness of the ceramic itself, has higher wear resistance, and greatly extends the service life of the product.
3.Zirconia parts with higher surface finish. After grinding and processing of two materials, zirconia has a higher surface finish, and the roughness can reach about Ra0.02. The surface is mirror-like, very smooth, and has a smaller coefficient of friction. But alumina roughness is about Ra0.2~Ra0.4.
4.Zirconia ceramics have excellent thermal insulation, and its thermal conductivity is less than one-tenth of the thermal conductivity of other ceramics.

In terms of price:
The price of alumina is lower than that of zirconia. One of the reasons is the cost of the raw material, another reason is the high processing cost of zirconia ceramics.

In terms of applications:

1.Alumina ceramic could withstand higher temperature, application in industry furnace.
2.As the wear resistance for zirconia is much better, it is frequently used as mortar and pestles, grinding jars and grinding media, bearing balls and ceramic parts in valves and pumps.
3.Zirconia has better corrosion resistance. Zirconia could survive longer in highly corrosive environment and is considered better material in chemistry laboratories.
So Zirconia ceramics are suitable for applications in high-load, high-strength, and chemically corrosive environments, while alumina ceramics are suitable for applications with low loads, high temperatures, and heat dissipation.

Four Main Applications Of Silicon Nitride Ceramics

1. Application of silicon nitride ceramics in the mechanical field
Silicon nitride ceramics are used in the machinery industry as valves, pipes, classifying wheels, and ceramic cutting tools. The most common use is silicon nitride ceramic bearing balls.

Compared with steel balls, silicon nitride ceramic bearing balls have outstanding advantages: low density, high temperature resistance, self-lubricating, and corrosion resistance. They are used in high-speed machine tool electric spindle high-speed bearings, aerospace engines, wind turbine bearings, and automobile engine bearings. Bearings for equipment such as
As a high-speed rotating body, the ceramic ball generates centrifugal stress, and the low density of silicon nitride reduces the centrifugal stress on the outer ring of the high-speed rotating body.
2. Application of silicon nitride ceramics in the semiconductor field
In addition to superior mechanical properties, silicon nitride ceramics also exhibit a range of excellent thermal conductivity properties, making them suitable for use in the demanding semiconductor field. In the field of integrated circuits, the degree of integration and power are increasing, which places higher requirements on the bending strength, stability, and heat dissipation capabilities of the substrates of packaged chips.

Silicon nitride ceramic substrates have higher thermal conductivity (typical values for commercial products are 80 to 90 W/mK). Compared with alumina substrates or ZTA substrates, they have more than three times the thermal conductivity and a thermal expansion coefficient (2.4 ppm/K) is small, close to semiconductor chips (Si, SiC), and has good thermal matching.
In addition, silicon nitride ceramic substrates have excellent mechanical properties, taking into account high bending strength and high fracture toughness. Compared with alumina substrates or aluminum nitride substrates, they have more than twice the bending strength, with a bending strength of 600 ~850MPa, fracture toughness is 5~7MPa·m½, so it has extremely high resistance to cold and thermal shock (extremely high reliability), and can weld very thick copper metal (thickness up to 800μm) to relatively thin nitride On silicon ceramics. Therefore, the current carrying capacity is high and the heat transfer is very good. Due to the excellent performance of silicon nitride substrates, it has good application prospects in power modules (IGBT/SiC power modules) for rail transit, wind power, photovoltaics, new energy vehicles, etc.
3. Application of silicon nitride ceramics in the field of bioceramics
As a new generation of bioceramic materials, silicon nitride ceramics not only have the excellent qualities that ceramic materials should have, but also have good radiographic properties, anti-infection properties, biocompatibility properties and osseointegration properties. They are widely used in biosensors, spine, and orthopedics. , dental and other implants are widely used.
4. Application of silicon nitride ceramics in the field of wave-transmitting materials
Silicon nitride ceramics and their composite materials have excellent properties such as heat resistance, wave transmission, and load-bearing, making them one of the new generation of high-performance wave-transparent materials studied. Due to the introduction of pores, porous silicon nitride ceramics have low density, low thermal conductivity, excellent pervaporation performance, and good transmittance of electromagnetic waves. In addition, they also have high specific strength, high specific modulus, high temperature resistance, oxidation resistance, and resistance to electromagnetic waves. Wear and other characteristics, it can be used as a ceramic-based wave-transmitting material to make radomes and antenna windows.

Ceramic metallized insulators for RF Package

In a development that could have a significant impact on the electronics industry, the latest ceramic metallized insulators are making strides in enhancing semiconductor packaging and related applications. These insulators offer a range of practical benefits that can improve the performance and durability of electronic components. Let’s take a closer look at what sets them apart:

Key Features of Ceramic Metallized Insulators:
1. Stability and Strength: The ceramic material employed in these insulators boasts an even texture, ensuring every batch maintains stable quality and flexural strength. This consistency in material quality is pivotal for the reliability of electronic components.
2.Dense and Weldable Metal Layer: The metal layers in these insulators are densely applied, providing a smooth and even surface. This not only enhances their appearance but also makes them easy to work with, particularly in manufacturing processes.
3. Exceptional Electrical Insulation: These insulators offer outstanding electrical insulation properties, characterized by a low dielectric constant. Additionally, they exhibit excellent resistance to abrasion and corrosion, guaranteeing long-lasting durability.
3.High Tensile Strength and Airtightness: With high tensile strength and airtight qualities, these insulators are well-suited for various applications, particularly those demanding high-frequency and high-power capabilities. Their durability and reliability make them a valuable choice for critical electrical components.

Applications:
The versatility of these advanced ceramic metallized insulators opens up a multitude of applications:
1. RF Packaging: These insulators are ideal for RF packaging, where small cavity sizes and reliable plating are essential. Their exceptional electrical properties and robust construction make them a practical choice for RF components.
2.Vacuum Electronic Devices: Their exceptional insulation and durability make these insulators a perfect fit for vacuum electronic devices, where maintaining a vacuum environment is essential.
3.LED Accessories: The insulators’ ability to withstand environmental factors and provide excellent electrical insulation positions them as valuable components in the LED accessory market, contributing to the longevity and efficiency of LED products.

While not groundbreaking innovation, these ceramic metallized insulators represent a step forward in enhancing the reliability and performance of electronic components across various sectors. As the demand for dependable electrical components continues to grow, these insulators are expected to play a pivotal role in various industries, offering practical solutions to everyday challenges.
Manufacturers and industry experts are keeping a close eye on the adoption of these insulators, which have the potential to raise the standards for semiconductor packaging and related applications. As technology evolves, these insulators are likely to become essential components in various electronic products, benefiting both manufacturers and consumers.

Applications for Metallized Ceramic Substrates

In a world where technological advancement knows no bounds, metallized ceramic substrates have emerged as a key player, enabling innovations in various industries. These versatile materials are gaining prominence in applications ranging from electronics to aerospace, thanks to their unique combination of electrical, thermal, and mechanical properties. Let’s explore the burgeoning landscape of metallized ceramic substrates and their ever-expanding applications.

Electronics Industry:
Metallized ceramic substrates have become indispensable in the electronics industry. These substrates provide a reliable foundation for the assembly of electronic components such as microchips and sensors. Their excellent electrical conductivity, thermal resistance, and ability to dissipate heat make them ideal for high-performance electronic devices.
One notable application is in power electronics, where metallized ceramic substrates are used in the manufacturing of power modules, inverters, and converters. These components play a crucial role in renewable energy systems, electric vehicles, and industrial machinery, contributing to energy efficiency and sustainability.
Aerospace and Defense:
The aerospace and defense sectors are also tapping into the potential of metallized ceramic substrates. These substrates are essential in the development of radar systems, communication equipment, and missile guidance systems. Their ability to withstand extreme temperatures and harsh environments ensures the reliability of critical components in aerospace and defense applications.
Metallized ceramic substrates have found their way into satellite technology, enabling the miniaturization of components while maintaining exceptional performance. This has led to more cost-effective and efficient satellite systems, facilitating advancements in global communication and Earth observation.
Medical Devices:
Metallized ceramic substrates are making waves in the medical device industry. They are used in the production of high-frequency surgical equipment, medical imaging devices, and implantable devices. The biocompatibility and stability of these substrates are paramount in medical applications, ensuring patient safety and device longevity.
In the field of diagnostic equipment, metallized ceramic substrates play a pivotal role in the development of accurate and reliable diagnostic tools, such as X-ray machines and ultrasound transducers. These substrates enable precise signal transmission and reception, leading to improved healthcare outcomes.
Renewable Energy:
The transition to renewable energy sources relies heavily on metallized ceramic substrates. They are crucial in the manufacturing of photovoltaic cells and wind turbine components. The ability to efficiently dissipate heat ensures the longevity of renewable energy systems, reducing maintenance costs and increasing energy production.
Metallized ceramic substrates are also used in fuel cell technology, contributing to the development of clean and efficient energy solutions. Their corrosion resistance and electrical conductivity are key factors in enhancing the performance of fuel cells, making them a sustainable choice for power generation.
In conclusion, metallized ceramic substrates are becoming increasingly pivotal across a wide spectrum of industries, driving innovation and improving the efficiency and reliability of various technologies. As research and development efforts continue to expand the boundaries of what is possible, we can expect to see even more groundbreaking applications emerge, further cementing the role of metallized ceramic substrates in shaping our technological future.

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