Examples of 'alpha alumina' in a sentence
Meaning of "alpha alumina"
alpha alumina: Alpha alumina is a type of alumina ceramic material known for its high strength and thermal conductivity. It is commonly used in various industrial applications, such as in the production of refractories, abrasives, and ceramics
How to use "alpha alumina" in a sentence
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alpha alumina
Alpha alumina comprises a preferred crystal structure.
Preferred inorganic oxides are alpha alumina and cordierite.
Alpha alumina is the preferred composite substrate.
The catalysts are prepared using a unique alpha alumina carrier.
Certain types of alpha alumina containing supports are particularly preferred.
The alumina precursor is capable of being sintered into alpha alumina.
Supports comprising alpha alumina or gamma alumina are more preferred.
Such prior art supports are preferably formed from alpha alumina.
Higher proportions of alpha alumina were found to exacerbate this problem significantly.
The aluminium oxide may be substantially in the form of alpha alumina.
Many modifications of alpha alumina sol gel grain have been reported.
It relates particularly to shaped articles made from a dispersion of an alpha alumina precursor.
An alpha alumina powder sold in the form of lightly sintered agglomerates was used.
This is possible by virtue of the better reflection properties of the alpha alumina particles.
The alpha alumina commonly called corindon can also be used in measured proportions.
See also
The dispersion may contain a nucleating agent to enhance the transformation to alpha alumina.
Many modifications of alpha alumina sintered sol gel abrasive grain have been reported.
Milling media particulates can catalyze the formation of alpha alumina in the fusing step.
Alpha alumina is a preferred material for use as the main ingredient of the porous support.
The invention relates to sintered sol gel alpha alumina based polycrystalline abrasive filaments.
One useful alpha alumina monohydrate is commercially available from the Alcoa Company.
The support used is an alumina, in particular an alpha alumina.
More preferably, alpha alumina is selected.
In a preferred embodiment, a gamma alumina coated alpha alumina.
It, therefore, comprised predominantly alpha alumina precursors such as boehmite.
X-ray diffraction indicated the complete conversion to alpha alumina.
The preferred alumina precursor is alpha alumina monohydrate, commonly referred to as boehmite.
In a preferred embodiment, the hydrated precursor of alpha alumina is seeded.
This procedure converts the alpha alumina monohydrate into gamma-alumina.
Especially preferably, the catalyst support essentially consists of alpha alumina.
A process for the production of an alpha alumina based catalyst carrier which comprises,.
The catalyst of claim 1 wherein the support comprises alpha alumina.
EXAMPLE 1 Fibers of hydrous iron polymer nucleated alpha alumina were generated in the following manner.
In these combinations and other combinations, the alumina is preferably alpha alumina.
Other alpha alumina monohydrates are commercially available from Condea GmbH, Hamburg, Germany.
In a preferred embodiment, a gamma alumina coated alpha alumina support is employed.
Boehmite… an alpha alumina monohydrate available from Condea under the trade name Disperal.
Preferred supports comprise the aluminous materials, in particular those comprising alpha alumina.
Combining alpha alumina particulate with a shell-forming material ;.
Particularly suitable supports are those of aluminous composition, in particular those comprising alpha alumina.
The preferred wash coat / substrate combination is a alpha alumina coated alpha alumina foam.
The alpha alumina of the zinc aluminate catalyst support had a crystalline domain size of 465 angstroms.
Traditionally the preparation of very fine grained, dense alpha alumina has been difficult.
The 1.0 micrometer material is alpha alumina having a hexagonal crystal structure and a Mohs Hardness Value of 9.
These fibers were clear, shiny and strong and were fully converted to alpha alumina.
The ceramic part 1 is preferably alpha alumina based and / or magnesia based.
Example catalyst supports include alumina, such as alumina powder in the form of alpha alumina.
For example, bulk ceria, zirconia, alpha alumina and other materials are known for such use.
The alumina carrier may include, in addition to theta alumina, various amounts of alpha alumina.
Typical commercial calcined aluminas have an alpha alumina content of greater than 90 % by X-ray diffraction.
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