Recent Examples of aluminum oxide from the Web
Such proposals often involve sulfates, particles that form in the stratosphere from sulfur dioxide ejected by volcanoes, or other molecules with high reflectivity, such as diamond dust or alumina (aluminum oxide).
Most new car batteries are rechargeable and use lithium in some form for one of the electrodes, cobalt or carbon for the other, and aluminum oxide for the electrolyte.
The interior of the tunnel was surrounded by plates made of silicone rubber and aluminum oxide powder.
As Sara Fecht points out in Popular Science, the simulant contains about three times more aluminum oxide, and six times more titanium oxide, than the real thing.
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Britannica.com: Encyclopedia article about aluminum oxide
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