The definition of brown fused alumina can be a wide variety of use that includes bond. It is in abrasive wheel to grind high tensile strength materials.
The definition of aluminum oxide is various forms of aluminum oxide. This only occurred naturally as corundum.
Xiaoxin Feng has written: 'Mixed I/III mode fracture toughness of a 2034 aluminum alloy' -- subject(s): Aluminum alloys, Fracture mechanics, Fracture
Yes indeed it is hard its hard but not not really really hard.
Aluminum has no specific gravity, at least by the current definition of gravity.
Koichi Masubuchi has written: 'Integration of NASA-sponsored studies on aluminum welding' 'Interpretive report on weld-metal toughness'
This compound is C12H20O4nAl. (n is unspecified)
Aluminium is quite soft and very easy to machine. It can be easily shaped and drilled. It can also be welded fairly easily.
Aluminum metal (symbol Al) is an element and therefore a pure substance. That said, if something is made out of aluminum (like aluminum foil) it is rarely pure aluminum and is typically an alloy composed of mostly aluminum with other metals. Alloys are used to improve the properties of the pure substance in various ways depending on the desired use. So, no, aluminum is not a compound.
Aluminum is a conductor and glass is an insulator. Conductors allow the flow of energy transfer, but insulators block this transfer of energy. So by definition, Yes, aluminum conducts cold or heat(energy) transfer faster than glass.
Mixture
Assuming both samples are pure aluminum, most teachers want to point out the difference in the air gaps between small spheres (usually the definition of "shot") in a test tube. With the air included, the density is less for the same cylindrycal volume. Using one of Archimedes' principles, the volume of the actual aluminum and not the air is more closely measured. More info in the link below.
Aluminum and oxygen form aluminum oxide. Aluminum and iodine form aluminum iodide.