How to distinguish the content of alumina in alumina ceramics

10-04-2020

How to distinguish the content of alumina in alumina ceramics

Alumina CeramicAluminum Oxide

 Alumina ceramics are products made from the chemical compound with the same name, alumina ceramic. Alumina ceramic, also known as aluminum oxide, is a combination of aluminumand oxygen. It occurs naturally, most often as corundum, as crystalline form of the compound that, when gem quality, manifests as sapphire or ruby. Alumina ceramic is extremely hard and durable, resistant to compressive strength, resistant to weathering, resistant to chemicals, electrically insulating, highly dense and stiff and incredibly thermally conductive. In fact, it is up to twenty times more thermally conductive than the majority of other oxides. In addition, it is quite cost effective. These qualities make alumina ceramics ideal for a wide variety of industrial and commercial applications, including: automotive and aerospace engineering, medical instrument fabrication, prosthetic limb creation, ballistic ceramic armor creation, metalizing, seal ring fabrication, welding, plating and the pre-finishing of wood flooring.


Before coming any number of useful products, all alumina ceramics begin as granular powder. This powder can be used alone, but, as is usually the case, it can also be mixed with other substances and stabilizers, selected based on way or ways that they can improve the alumina. A common additive, zirconia, for instance, is added to the mix in order to increase the ceramic’s fracture toughness. Examples of other additives include manganese oxide, titania, silica, copper and brass. Note that, when it is in its natural state, alumina is white, but when mixed with additional substances, it frequently changes color. For example, alumina ceramics that are around 96% pure are typically brown in color, while those alumina ceramics that are less pure, around 88% for instance, are usually pink.

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