Assertion: aluminum | /r/HasProperty | 2 o
Facets:
Source sentences:
text: Aluminium forms one stable oxide with the chemical formula Al 2 O 3 , commonly called alumina.
text: O is made by heating the normal oxide, Al 2 O 3 , with silicon at 1,800 °C (3,272 °F) in a vacuum.
text: Impurities in Al 2 O 3 , such as chromium and iron, yield the gemstones ruby and sapphire, respectively.
text: At elevated temperatures, however, a few gaseous monovalent and bivalent compounds have been prepared (AlCl, Al 2 O, AlO).
text: The correct formula, Al 2 O 3 , was established by German chemist Eilhard Mitscherlich in 1821; this helped Berzelius determine the correct atomic weight of the metal, 27.
text: Al 2 O 3 is an electrical insulator but has a relatively high thermal conductivity (30 Wm−1K−1) for a ceramic material.
text: Some 90% of the gibbsite produced is converted into aluminium oxide, Al 2 O 3 , by heating in rotary kilns or fluid flash calciners to a temperature of about 1470 K.
text: Al 2 O 3 is an electrical insulator but has a relatively high thermal conductivity (30 Wm−1K−1) for a ceramic material.
text: 3 , also called alumina trihydrate (ATH), is converted via a second reaction step (usually slowly over a few hours at room temperature, more rapidly in a few minutes at higher temperatures) into aluminum oxide, Al 2 O 3 :
text: Aluminum oxide, Al 2 O 3 , is called alumina and occurs in nature as the mineral corundum.
text: Aluminium will burn in oxygen with a brilliant white flame to form the trioxide alumnium(III) oxide, Al 2 O 3 .
text: 2Fe + Al 2 O 3 , which liberates a good deal of heat.
text: Alumina, Al 2 O 3 , is the refractory oxide of aluminium, which does not melt below 2000°C.
text: The gibbsite is usually converted into aluminium oxide, Al 2 O 3 , by heating in rotary kilns or fluid flash calciners to a temperature in excess of 1,000 °C (1,830 °F).