Why Alumina Ceramics Become More and More Popular?
by Lisa Ross Marketing ManagerAlumina (aluminium oxide) is a high
hardness compound with a melting point of 2054 ° C and a boiling point of 2980
° C. It belongs to ionic crystals that can be ionized at high temperatures, so
it is often used to make refractory materials. As far as the alumina ceramic structure
is concerned, its wear resistance is 15 times that of magnesia ceramics; its
friction coefficient is 1/2 of that of magnesia ceramics. Alumina ceramic
products have a higher surface finish and less friction, which prolongs the
service life and saves costs.
The advantages of alumina are as follows:
1. Good thermal stability. It
still maintains its good performance when used at high temperatures.
2. Stable chemical properties. Resistant to
organic solvents, chlorides and strong acids and alkalis, and not easily
degraded by microorganisms.
3. Great strength. Capable of operating
under large pressure gradients without compression and creep.
4. Compared with polymer film, alumina
products do not appear aging. As long as it is not damaged, it can be used for a
long time.
5. Alumina is a white solid which is hardly soluble in water. It is odorless, tasteless and extremely hard.
The followings
are the uses of alumina:
1. The main components of ruby and
sapphire are alumina, which show different colors due to the content of
impurities. Sapphire contains iron oxide and titanium oxide and is blue.
2. The main component of bauxite
is feroxite, and the substance with the highest content is alumina.
Industrially, ferrite is purified into alumina through the Bayer process, and
then converted into aluminum metal by the Hall-Heroult process.
3. Aluminum reacts with oxygen in
the air to form a dense aluminum oxide film covering the surface of aluminum
exposed to air.
4. Aluminum is a good conductor of
electricity and heat. The crystal form of alumina is suitable for abrasive
materials and cutting tools because of its high hardness.
5. Alumina powder is often used as
a vehicle for chromatographic analysis.
6. Tempered glass can be produced
from alloys synthesized from aluminum and rare earth elements.
For more information, please visit https://www.preciseceramic.com/.
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Created on Jan 8th 2020 01:59. Viewed 444 times.