Applications of alumina ceramics with different alumina content

High-purity alumina ceramics with Al2O3 content of 99.9%, the sintering temperature is as high as 1650-1990 ° C, transmission wavelength of 1 ~ 6μm.

High-purity alumina ceramics generally can be used to replace platinum crucible:

because of the light transmission and resistance Alkali metal corrosion, high-purity alumina ceramics can be used as sodium lamp tubes;

It can be used as an integrated circuit substrate and high frequency insulation material in the electronics industry.

Alumina ceramic materials with Al2O3 content of 99% can be used to make high temperature crucible, refractory furnace tubes and special wear-resistant materials,

such as ceramic bearings, ceramic seals and water valve sheets;

Alumina ceramic materials with Al2O3 content of 95% are mainly used as corrosion-resistant and wear-resistant parts and insulating parts;

Alumina ceramic materials with Al2O3 content of 85% are often blended with some talc to improve electrical properties and mechanical strength.

They can be sealed with metals such as molybdenum, niobium and tantalum, and some are used as electric vacuum devices.

Alumina ceramics (80% Min.) can also be used as insulation parts.

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Alumina Ceramic Components

Alumina Ceramic Components

(Al2O3)

Alumina ceramics is the most widely used ceramic material. It offers superior mechanical strength, electrical insulation, high frequency retention, thermal conductivity, heat resistance and corrosion resistance.

Alumina ceramic materials are used in a wide range of applications such as electronics, pump components and automotive sensors.

Lithaiwa supplies a variety of alumina ceramics of alumina content from 80% to 99.9%
Physical properties, shape, dimensions and tolerance as required.

Typical Physical Properties of Alumina Ceramics:

Good electrical insulation
High mechanical strength
High hardness
Excellent thermal stability
Good chemical stability
Excellent wear resistance
Excellent corrosion resistance
Low dielectric constant
Good heat resistance.

Typical Alumina Ceramic Products:

Pump seals and components
Wear resistant components
Insulating washers or bushings
Semiconductor components
Aerospace components
Electrical or electronic insulators (spacers)

Alumina ceramic spacers

ceramic spacer, ceramic ring, advanced ceramic parts, precision ceramics, ceramic components

Precision alumina ceramic parts

advanced ceramic parts, precision ceramics, ceramic components

Alumina ceramic crusher

advanced ceramic parts, precision ceramics, ceramic components

Alumina ceramic axle sleeve

industrial ceramics, ceramic sleeve

Alumina ceramic flange

ceramic tube, advanced ceramic parts, precision ceramics, ceramic components

Alumina ceramic spacer

Alumina ceramics - 0065

Precision alumina ceramic part

ceramic part, advanced ceramic parts, precision ceramics, ceramic components

Alumina ceramic tube

ceramic tube, advanced ceramic parts, precision ceramics, ceramic components

Alumina ceramic ring

ceramic ring, advanced ceramic parts, precision ceramics, ceramic components

Alumina ceramic disc

advanced ceramic parts, precision ceramics, ceramic components

Alumina ceramic substrates

ceramic substrates, advanced ceramic parts, precision ceramics, ceramic components

We make custom products according to special design or requirements.

OEM is acceptable.

Propiedades y aplicaciones de la cerámica de alúmina (Al2O3)

Generalmente, la fase cristalina principal de las cerámicas de alúmina es α-Al2O3.

Existen diferentes series según el contenido de Al2O3 y los aditivos.

Según el diferente contenido de Al2O3, hay 75 alúmina, 85 alúmina, 95 alúmina, 99 alúmina, etc.
De acuerdo con la diferencia de su fase cristalina principal, hay mullita, corindón-mullita y corindón;
De acuerdo con los diferentes aditivos, hay corindón de cromo, corindón de titanio y así sucesivamente.

La cerámica alúmina es una de las propiedades químicas más estables y la mayor resistencia mecánica en los óxidos refractarios;

Las cerámicas de alúmina no reaccionan con la mayoría de los metales fundidos, pero solo Mg, Ca, Zr y Ti tienen un efecto de reducción por encima de cierta temperatura.

El ácido sulfúrico caliente puede disolver las cerámicas de alúmina, y el HCl y HF calientes también tienen algún efecto corrosivo.

Las cerámicas de alúmina tienen la presión de vapor y la presión de descomposición más bajas.

Debido a la excelente estabilidad química de las cerámicas de alúmina, se puede utilizar ampliamente en impulsores de bombas resistentes a los ácidos, cuerpos de bombas, cubiertas de bombas, bujes, revestimientos de tuberías y válvulas que llevan ácido.

Las cerámicas de alúmina con un contenido de alúmina superior al 95% tienen excelentes propiedades de aislamiento eléctrico y baja pérdida dieléctrica, y por lo tanto tienen una amplia gama de aplicaciones

En electrónica y electrodomésticos.

La alta dureza y la resistencia al desgaste de las cerámicas de alúmina se han utilizado ampliamente en el campo mecánico, como la fabricación de piezas de desgaste textil, cuchillos.

Las bujías de encendido de alúmina también se usan ampliamente en varios motores.

Las cerámicas transparentes de alúmina tienen buena permeabilidad a la luz visible y a los rayos infrarrojos, así como a la resistencia a altas temperaturas, a la buena resistencia al calor y a la fuerte resistencia a la corrosión.

Las cerámicas transparentes de alúmina se pueden utilizar para fabricar lámparas de sodio de alta presión y material de ventana de detección infrarroja.

 

Properties and applications of Alumina (Al2O3) Ceramics

Generally, the main crystal phase of alumina ceramics is α-Al2O3.

There are different series depending on the content of Al2O3 and additives.

According to the different content of Al2O3, there are 75 alumina, 85 alumina, 95 alumina, 99 alumina, etc.
According to the difference of its main crystal phase, there are mullite, corundum-mullite and corundum;
According to the different additives, there are chromium corundum, titanium corundum and so on.

Alumina ceramic is one of the most stable chemical properties and highest mechanical strength in refractory oxides;

Alumina ceramics do not react with most molten metals, but only Mg, Ca, Zr and Ti have a reduction effect above a certain temperature.

The hot sulfuric acid can dissolve the alumina ceramics, and the hot HCl and HF also have some corrosive effect.

Alumina ceramics have the lowest vapor pressure and decomposition pressure.

Due to the excellent chemical stability of alumina ceramics, it can be widely used in acid-resistant pump impellers, pump bodies, pump covers, bushings, acid-carrying pipe linings and valves.

Alumina ceramics with an alumina content higher than 95% have excellent electrical insulation properties and low dielectric loss, and thus have a wide range of applications

in electronics and electrical appliances.

The high hardness and wear resistance of alumina ceramics have been widely used in the mechanical field, such as the manufacture of textile wear parts, knives.

Alumina ceramic spark plugs are also widely used in various engines.

Transparent alumina ceramics have good permeability to visible light and infrared rays, as well as high-temperature strength, good heat resistance, and strong corrosion resistance.

Transparent alumina ceramics can be used to manufacture high pressure sodium lamp and infrared detection window material.

Cerámica y aplicaciones de alúmina

Las cerámicas de alúmina tienen un excelente rendimiento de aislamiento, resistencia al calor y resistencia a la abrasión.

Debido a las propiedades integrales y el costo relativamente bajo, la cerámica de alúmina es uno de los materiales cerámicos avanzados más populares.

El material de alúmina de alta pureza (contenido de alúmina ≥ 99.5%) es ampliamente utilizado en equipos de semiconductores debido a la buena resistencia a la corrosión.

Propiedades principales:
Aislamiento eléctrico;
Resistencia al calor;
Resistencia a la abrasión;
Resistencia a la corrosión.

Aplicaciones:
Componentes para semiconductores, LCD, LED, etc.
Partes aislantes eléctricas;
Componentes de resistencia a la abrasión;
Componentes de maquinaria y componentes de control de fluidos.

 

 

Advantages of alumina ceramic tube

Alumina ceramic tube is a type of ceramic material mainly composed of alumina (Al2O3).

It can be used in chemical engineering, electronics, aerospace,military equipment and other applications.

Alumina ceramic tubes have following advantages:

1. Good stability:
The surface of the alumina ceramic tube is flame-retardant and has good fire resistance.
The working performance will be not affected under a high temperature of 1200 ℃.

Alumina ceramic tubes have good acid and alkali resistance. No matter what the usual chemical solvents, corrosives, or other chemical dyes, they will not cause corrosion on the surface of the ceramic tube.

2. Easy to clean:
The strong corrosion resistance of the surface of the alumina ceramic tube makes it easy to wash with the washing solution without affecting its color and surface;
A tightly impervious surface does not easily adhere to dust.

3. Good appearance:
After the alumina ceramic tube is sintered, the shape can be machined with a machine or laser, and the required dimensional tolerance can be achieved.

The machining finished appearance is good.

4. Anti-static:
Alumina ceramic tubes are made of alumina.

Alumina has proven to be a good anti-static material.

Under extreme conditions there will be low conductivity.

5.Good impact performance and Scraping resistance:
The finished surface structure of ceramic tube make the ceramic tube is not easily damaged under the action of hard objects, and the ceramic tube has strong impact resistance performance.

Is alumina ceramic acid corrosion?

Alumina ceramics have good acid and alkali resistance and can be used under medium or strong alkali conditions under normal conditions.

Alumina ceramics are not resistant to high-strength acids and bases.

If the use of the environment is beyond the 1:9 concentration of hydro-chloric acid, or more than 10% concentration of sodium hydroxide solution, there will be more obvious corrosion.

Alumina ceramics have characteristics such as wear resistance, high temperature resistance, acid and alkali resistance, insulation, etc., and are therefore widely used in many industries such as machinery, electronics, chemical engineering, and fireproofing. refractory.