Allumina (Al2O3)

Alumina (Al2O3) is one of the most studied ceramic materials. Known for its low electrical conductivity, superior resistance to chemical attack and extreme strength.

Chemical inertness and bone biocompatibility have made titanium an ideal material for hip prostheses, while its excellent thermochemical and thermomechanical processing conditions have made it the go-to refractory in many petrochemical applications.

99.9% Alumina

Ceramic parts made of this material are typically utilized in machine engineering, textile production and electronics applications. It offers excellent pressure resistance, hardness, thermal and electrical insulation properties and corrosion-resistance characteristics making it suitable for corrosive environments.

The Kappa Phase exhibits an orthorhombic crystal structure with close-packed oxygen planes in an ABAC stacking sequence along the c-axis, with three quarters of the Alumina Ions taking up positions within its interstitial spaces that are tetrahedral interstitial positions, while one quarter occupy octahedral positions resulting in its dark hue.

High-purity aluminas boast superior physical and chemical characteristics that make them the ideal material for demanding applications, including plasma etch components and nuclear grade insulator parts. CoorsTek provides various unique alumina compositions and microstructures tailored specifically for specific requirements – unlike other technical ceramics, such as silicon carbide. Alumina is dense material which doesn’t porosify like other technical ceramics do; thus enabling it to resist corrosion better while remaining strong at high temperatures – ideal properties for furnace linings or thermal barrier coatings applications.

94% Alumina

Alumina (Al2O3) is an essential material in the manufacturing of aluminum metal and forms the base material for numerous advanced ceramic products. Alumina also forms natural gemstones such as corundum (ruby and sapphire), as well as synthetic gem-like crystals called bauxite which have gem-like qualities.

Alumina is one of the most widely-used advanced ceramic materials, known for its superior wear resistance, chemical stability and electrical properties. Alumina’s ability to withstand high temperatures without oxidizing or corroding has seen it used in numerous applications such as pressure sensors, wear coatings for pumps, laser components, X-ray tube feed throughs and body armor production by military. Alumina also boasts strong mechanical, thermal and electrical properties making it suitable for military body armor manufacturing as well as being stronger and denser than glass making it ideal for manufacturing ceramic-to-metal feed throughs as well as special crucibles.

99% Alumina

99% alumina ceramics are dense, dense materials with few voids, providing both electrical and mechanical stability across a broad temperature spectrum. Their hermetic nature prevents leakage of liquids or gasses – qualities which make them suitable for applications such as ceramic to metal feed throughs, X-ray component feed throughs, high voltage bushings and medical implants.

Ceramic materials like this one are highly resistant to chemical attack, withstanding hydrofluoric acid, molten alkalis and alkali vapors without being damaged by radiation that would harm other materials.

Ceramic materials such as Zirconia are ideal for components that must withstand extreme environments, such as spark plugs, valves and seals. They can be dry pressed, isostatic pressed, tape cast or injection molded – with excellent hermeticity, compressive strength and thermal shock stability as well as cold and hot fatigue resistance as well as fracture toughness and wear resistance properties.

98% Alumina

Alumina is an extremely hard and resilient material. Its strength comes from its strong ionic bond with oxygen anions (O2-), creating an extremely durable structure which is resistant to fracture.

Manufacturers typically mill alumina powder down to sub-micron levels, producing ceramic after firing with very small grain sizes and minimal voids for optimal wear resistance.

Calcined aluminas vary according to heat treatment and crystal size, as well as their soda content (low soda for electronic applications, medium sodium for electrical insulation and porcelains and high sodium for glass, glazes and fibreglass). They are used in structured catalyst supports, washcoats and as substrate for special crucibles as well as having excellent hermeticity properties that make it possible for body armor use that can withstand small arms fire while stopping medium caliber cannon bullets from passing.

95% Alumina

95% alumina ceramics offer low thermal expansion coefficient and high resistivity values that make them an excellent material choice in applications where stability and rigidity must remain stable at elevated temperatures, such as in insulators, ceramic substrates and electron tube manufacturing for electronic equipment manufacturing.

Reactive alumina ceramics are composed of fine crystal particles with no gaps, giving it an exceptionally high volume resistance – the inverse of electrical conductivity.

Calcined alumina differs depending on its crystal size, soda content and degree of conversion to alpha phase (low soda alumina is often used in electronics applications; medium-sodium versions for electrical insulation and porcelains; while higher levels may be found in glass production, refractories and metallurgical kilns). 95% alumina typically has a relatively high DC breakdown strength as determined by national standard GB/T5593-1999 when tested at 1MHz frequency.

85% Alumina

Coors AD 85 alumina offers exceptional electrical insulating properties as well as extreme hardness and wear resistance, making it the go-to material in various manufacturing techniques such as uniaxial pressing, isostatic pressing and injection molding. Compared to electroporcelain components made with unstable Al2O3 particles (electroporcelain components feature inferior mechanical properties such as high tensile strength and thermal conductivity).

Pure alumina ceramics are among the hardest, strongest and stiffest of all oxides. Their surface features excellent wear-abrasion resistance as well as highly corrosion resistance in both oxidizing and reducing environments, and are inert to most chemicals – making it particularly suitable for use as raw material in refractories. Alumina also exhibits inertness toward water vapor and acid, making it very resistant against these environments as a raw material source. Sintering accelerators such as talc can help promote high densification during sintering to enhance high densification during sintering; CuO or TiO2 are sometimes added for enhanced densification during calcined alumina calcined to achieve low sodium levels below 100ppm weight levels during production processes – ideal characteristics of low-sodium calcined aluminas have sodium contents below 100ppm weight;

80% Alumina

Bauxite, an naturally occurring mixture of hydrous aluminum oxides, serves as the raw material for aluminum metal production and forms the basis of advanced industrial ceramics.

Dense, non-porous materials with excellent thermal and chemical stability such as polycarbonate offer exceptional insulation properties and chemical resistance, making it the material of choice for use as insulators, bushings, grinding media and wear parts in oil and gas drilling equipment. Furthermore, this versatile material serves as nozzles, valve seats and counter face seals on pumps used to handle chemicals.

REI grade 903 is a reactive material containing high percentages of crystals in the low green density range and low green density that increases upon sintering, making it an excellent material choice for laser reflectors due to its low absorption rate and emission particle attenuation properties. Furthermore, this grade can also be found used in electric arc furnace roofs, steel ladles, cement rotary kilns/coolers/melters, copper melters and glass tank kilns among many other uses.

75% Alumina

Alumina is a white crystalline substance mined from bauxite ore and known for its exceptional strength, hardness, chemical attack resistance and low electric conductivity compared to its electrical conductivity and insulation properties.

Corundum, the gem-grade form of alumina, comes in various hues. Ruby and sapphire gemstones obtain their vibrant hues from trace impurities in corundum crystals.

Metallurgical-grade alumina is produced by heating alumina hydroxide in fluid flash or fluid bed calciners to form its fluid form, and used for various purposes including integrated circuit substrates, gas-discharge lamp burners and valve gates. Due to its excellent refractory qualities and lack of iron content, this form of alumina is also used extensively in glass tank furnaces and kilns for chemicals and refineries – with its highest bulk density and highest purity rating making it one of its most widely-used types.

50% Alumina

Alumina is a key industrial material with numerous applications. Due to its hardness and thermal stability, alumina makes an invaluable component of electronic substrates, integrated circuit packages, insulating bushings and furnace linings.

Transformation of natural alumina and corundum deposits to industrial products involves an intricate process. Recent innovations in extraction and purification technologies have improved alumina’s quality, making it suitable for use in cutting-edge electronic devices.

Alpha alumina is the most prevalent type of alumina. It has an orthorhombic crystal structure with oxygen ions arranged close together along an ABAC stacking sequence; half of the aluminium ions per unit cell occupy tetrahedral interstitial positions while others take up octahedral vacancies; its high density allows it to be produced using low sintering temperatures.

Microfine Alumina

Although alumina is generally considered inert material, its powders are also ground into fine particle sizes for applications that require chemical inertness. Micronized particles provide for more uniform bodies when dry pressed, isostatic pressed or tape cast when compared with traditional ceramic mixtures.

Alpha-alumina has an atomic structure composed of aluminum cations Al3+ in an hexagonal crystal lattice filled with oxygen anions O2-. Due to strong ionic and covalent bonds between its aluminum ions Al3+ and oxygen anions O2- atoms, alpha-alumina displays unique properties: low electric conductivity, chemical attack resistance, hardness, thermal stability.

Alumina and corundum are indispensable parts of many industrial and technological systems, from cutting-edge electronics to hardy mechanical parts. Recent advancements in chemical extraction and purification technology have increased purity levels of alumina significantly, yielding improved performance levels. Corundum, an extremely hard and durable form of alumina known for its exceptional hardness and resilience is frequently utilized for applications requiring hardness and wear resistance, such as in refractory environments.