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What else can I help you with?
Prorerties of high alumina cement?
It is resistant to sulfates. It can withstand high temperatures. (It melts at around 3000 F.) It is resistant to sulfates. It can withstand high temperatures. (It melts at around 3000 F.)
What is the difference between alpha and gamma alumina?
Alpha alumina has cubic crystal structure, and gamma - rhombohedral (i.e. it is a "skewed cubic") Due to their geometry the typical surface area of a particle is affected, and alpha alumina has fewer -OH groups than gamma alumina. Iron oxide can also have either alpha or gamma structure, and is described on wiki http://en.wikipedia.org/wiki/Iron(III)_oxide
What is difference between calcined alumina and alumina hydrate?
Calcined alumina is produced by heating alumina hydrate to high temperatures, which removes the chemically bonded water and results in a more pure form of alumina. Alumina hydrate, on the other hand, contains chemically bonded water molecules and is typically used as a flame retardant or filler material due to its lower processing temperature and cost effectiveness.
WHAT IS ACTIVATED ALUMINA?
Activated alumina is a type of porous alumina with a very high surface area.
Where high alumina bricks are used?
High Alumina bricks are used for non-ferrous Industry.
Where High alumina CA STABLES used?
High Alumina Castables are mainly used in the place wherein High-Temperature fields.
Why alumina is electrolysed in molten state?
In solid state, Aluminium and oxide ions are immobile. When aluminum oxide is melt down,aluminum and oxide ions become free and they can easily migrate to respecve electrodes. Therefore, aluminum oxide is electrolysed in molten state.
Why couldn't scientists in 1800 extract aluminium from alumina?
In 1800, scientists could not extract aluminum from alumina because the process to extract aluminum from alumina requires high temperatures and the availability of electricity, which were not readily accessible or understood at that time. It wasn't until the late 19th century, with the development of the Hall-Héroult process, that a commercially viable method for extracting aluminum from alumina was discovered.
How do you break aluminum alumina bond?
I'm not quite sure what you mean because alumina is a compound (aluminum oxide or Al2O3) and aluminum is an element. Therefore, there isn't a bond per se from aluminum to alumina... just aluminum-aluminum bonds and aluminum-oxygen bonds. I do know that alumina will dissolve in a strong base solution, such as KOH or NaOH, and so if you have a layer of alumina on an aluminum sheet, a strong base solution will remove it. Also, a strong acid will dissolve the aluminum. (I do have to admit I'm not entirely sure what the effect of a strong base on aluminum and a strong acid on alumina is, though... and that might be a problem... hmm...)
What is tabular alumina?
Tabular alumina is a high-purity form of aluminum oxide that is made by sintering or heat-treating alumina powder. It has a unique tabular shape that provides high mechanical strength, thermal shock resistance, and chemical inertness, making it ideal for applications in refractory materials, ceramics, and catalyst supports.
How do you determine the max temperature of high alumina refractories?
If the furnace is lined with refractories and the charge is full a 60% alumina will be 1600C.
What nonmetal materials can withstand high temperatures?
Nonmetal materials that can withstand high temperatures include ceramics (such as alumina and zirconia), refractory metals (like tungsten and molybdenum), and certain composite materials (such as carbon-carbon composites). These materials have high melting points and good thermal stability, making them suitable for high-temperature applications.
