Types of Alumina Powder
Alumina powder can be used in a variety of applications. Its properties and applications can be influenced by the type of alumina used. For more information, read about Microfine Alumina Powder. This mineral is a common component of cement, mortar, and other building materials. Its purity is 99.9%, and it is de-agglomerated and calcined to 99.99% purity.
Microfine alumina powder
Microfine alumina powder is a type of alumina with particle sizes less than one micron. This type of alumina is used in the refractories industry and fills voids between other particles. It can reduce the amount of water required in refractories.
Microfine alumina powder can be produced by using a mixed alkoxide or chloride starting material. These precursors are subjected to different heat treatments, including hydrothermal processing and heating under reflux conditions. The effects of these conditions on the properties of the powders were studied by X-ray powder diffraction and preliminary Al-27 solid state magic angle spinning NMR. The results showed that microfine alumina powder is rutile at low temperatures.
Microfine alumina powder can be used in many industries. Its hardness makes it an excellent material for abrasive applications. It is also used in electronic parts and has a high melting point.
Properties of alumina
Alumina powder is one of the most important materials used in the manufacturing of electronic components. It has high melting and boiling points and excellent thermal resistive properties. This makes it a valuable material for making heatsinks and microchips. It is also an important material in the formation of gems, such as sapphires and rubies. These gems contain the base element corundum, which is also a major component of alumina.
Alumina powder comes in various grades depending on its application. Microfine alumina, for instance, is used in the refractories industry because of its fine particle size. Its micro-particle size allows it to fill in voids between other particles and increase density. It also reduces water requirements.
The bulk density of SGA is between 0.9 and 1.15 g/cm3, while skeletal density varies from 3.5 to 3.7 g/cm3. Higher alpha content increases the skeletal density. The bulk density-skeletal density ratio indicates high porosity of SGA due to intra-particle porosity.
Applications of alumina powder
Various types of alumina powder are used in a variety of applications. Some are microfine, which means they have particles that are less than one micron in size. These are used in refractories, where they increase density and reduce water usage. Other types are used as filler materials for various products.
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