Hliník CTe - univerzálna technická keramika

Alumina (Al2O3) is an advanced refractory ceramic with exceptional properties. It can be formed into near net shapes using various consolidation and sintering techniques, providing excellent bonding performance.

Due to its inherent toughness, alumina can be challenging to machine; however, advanced green and biscuit machining processes allow tight tolerances with tight tolerance control. Fully sintered alumina must be ground with diamond tools before use.

Charakteristika

Alumina cte (Al2O3) is an engineering ceramic with exceptional mechanical strength, hardness, corrosion and wear resistance as well as dielectric properties and low thermal expansion coefficient. As such it makes an excellent material choice for numerous demanding applications.

Alumina can be produced both naturally and synthetically from bauxite, an ore containing variable amounts of aluminum oxides. Alumina serves as the starting material for producing aluminum metal as well as advanced ceramic products used for high vacuum devices, X-ray tubes and electron microscopes. It’s used as the starting material in many other processes as well.

Alumina’s superior mechanical properties make it an attractive material choice for industrial materials transfer components, such as transfer bearings. Alumina can withstand high pressures and temperatures found in mining operations as well as material processing environments prone to corrosion; its hardness and abrasion-resistance also make it suitable for use as armour plating on military vehicles, equipment and personnel.

Alumina’s versatility enables it to be machined from its green, biscuit, and fully dense states; however, due to its inherent toughness and high hardness it cannot be machined with precision to extremely tight tolerances using traditional methods alone; consequently it may need reworking or grinding with diamond tools and abrasives before being sintered into final parts.

Green or biscuit form alumina can be easily machined into intricate forms before being sintered to produce its final product, enabling users to tailor it precisely to meet application specifications. Unfortunately, this grinding and reworking process often proves time-consuming and expensive.

Purity of alumina is an integral characteristic to consider, with higher purity levels resulting in finer granules and superior surface finishes possible. Alumina with 99.6% purity is often utilized for thin film metal-deposited applications due to its smaller grain size and more consistent thermal conductivity, electrical insulation values, dielectric constant, thermal expansion coefficient properties.

Aplikácie

Alumina is one of the strongest engineering ceramics, offering exceptional dielectric, abrasion resistance, thermal conductivity, refractoriness and refractoriness properties. A variety of purities and additives are produced for specific uses – ceramic-to-metal feedthroughs; X-ray component feedthroughs; high voltage bushings as well as implantable medical device applications are made using Alumina as it makes an ideal material choice. Alumina also makes excellent stress relieving beads; thermal insulators protecting work pieces from welding/heat treatment as well as special crucibles designed specifically for chemical processing metallurgical or chemical processing applications.

Cold isostatic pressing (CIP), an advanced manufacturing technique, can significantly enhance machinability by encasing powder within an enclosed sheath and applying pressure uniformly from multiple directions, producing denser parts with better quality and higher shape capability.

Fine grain technical grade alumina comes in various shapes, sizes and thicknesses to meet various application needs. Impurity levels range from 94% for metalization applications up to 99.8% in high temperature applications.

Alumina boasts outstanding mechanical properties and is extremely stable, making it one of the most cost-effective ceramics on the market. Alumina’s resistance to abrasion, wear and corrosion make it suitable for many structural applications; in fact its abrasion resistance surpasses that of steel while its hardness and toughness rival those of silicon carbide.

Alumina can be formed into various forms, from granular ceramics to complex three-dimensional components. It’s even available as casting slurry for direct sintering and can produce sintered body parts with very low coefficient of thermal expansion. Plus its chemical inertness and stability make it suitable for abrasion resistant coatings and corrosion protection applications – Wunder Mold has you covered for all of these needs and more!

Purity

Alumina is one of the most widely used engineering ceramics, and comes in an assortment of purities to meet specific applications. High purity alumina (Al2O3) is typically employed in demanding environments due to its excellent wear, corrosion, thermal shock and strength properties as well as being easily metallizable and withstanding very high temperatures. Purity levels can be tailored specifically for any given application ranging from 94% for easily machined requirements up to 99.8% in demanding situations where superior performance is demanded.

A variety of alumina ceramics with different compositions and microstructures is available to meet the demands of various applications. Composition can be tailored to achieve desired performance levels for your application and precise fabrication can take place using various consolidation and sintering techniques for fabrication of near net shapes for optimal value products made of this ceramic material.

CoorsTek provides over 100 distinct alumina compositions that can be tailored specifically for various specialized applications. Our experienced engineers can assist in selecting an alumina grade that fulfills all your specific application needs.

Purity of alumina material has an influence on its abrasion resistance and conductivity, which directly impact its ability to resist heat shock. Our X-ray and diffraction tests have demonstrated that higher purity alumina exhibits greater abrasion resistance with decreased thermal expansion rates, making it the superior choice for high performance applications.

As well as purity, granularity of alumina influences its thermal properties. We utilize diffraction and X-ray testing to measure the size, shape and distribution of grains of alumina for thermal expansion reactivity testing and determine their thermal expansion characteristics – this data allows us to create dense porous ceramics tailored specifically for your application needs.

ZIRCAR Alumina family includes an extensive selection of products with different porosities, grades and grain sizes to meet your application. For instance, AL-30 grade alumina material offers uniform open porosity suitable for machining with its low bulk density and high purity inorganic biners that give it superior hot strength, dimensional stability and mechanical integrity at elevated temperatures.

Manufacturing

Physical properties of alumina vary considerably depending on its purity and production process. Fine-grain technical grade alumina offers an optimal combination of cost and performance in applications that require high strength, chemical stability and extreme temperatures resistance. With purity levels ranging from 94% for easy metalizabilities up to 99.8% – ideal for meeting even the most stringent application specifications – fine-grain technical grade alumina offers an economical yet efficient choice.

Manufacturing Alumina CTE requires numerous processes in order to produce its ceramic shapes necessary for an application. Moulds and casting methods can be utilized in order to create complex-shaped products like crucibles, insulators, gas containers, furnace components, welding nozzles, stress reliever beads or other specialty shapes. A variety of thicknesses is also available so as to meet different requirements.

Alumina cte is an extremely hard and tough material suitable for industrial cutting tools. Additionally, translucent versions may be produced by adding small amounts of magnesia during its manufacturing process. Machined or ground using diamond coated tools or wheels often achieves dimensions, surface finish and tolerances ideal for an application.

Alumina cte production begins with the creation of an alumina slurry. Once created, this liquid material is placed into plaster molds and allowed to solidify over time. A hollow grouting method may be utilized when molding larger components that need to be created quickly in one piece; using this type of mold allows for rapid development.

To ensure the alumina slurry has the ideal density and consistency, multiple tests are run. This includes assessing thermal procedural components as well as exploring agglomeration techniques and prospective biners. Depending on its application, batch or pilot-scale kiln testing may also be required in order to identify an ideal combination of ingredients for creating final alumina cementitious product (cte).

Engineering ceramics such as alumina cte are widely utilized across aerospace, automotive and industrial markets due to their durability, resistance to corrosion, tolerance of high temperature environments and ability to absorb impact damage. Furthermore, its low coefficient of thermal expansion makes this material suitable for bearings or insulation in high temperature environments.