What is a metal oxide

Metal oxide, the

Examples:

The hydrogen that the fuel cell needs to generate electricity is generated from salt, water and a metal oxide. [Der Spiegel, 04.03.2015 (online)]

[...] can rust also be beautiful? The new special exhibition in the Museum Reich der Kristalle [...] proves this in a wonderful way: The metal oxide shimmers in all colors and shapes, as if an abstract artist had lent a hand. The museum wants more, of course: to explain how rust occurs, which oxidation processes take place in nature and which treasures are hidden under the earth's surface […]. [Süddeutsche Zeitung, December 9, 2004]

While researchers thought for a long time that the metal itself promoted the reactions, they now know that the metal surface first has to combine with oxygen itself. "Oxides have to form first," says Scheffler. Only the metal oxide is highly reactive and starts the conversion of carbon monoxide to carbon dioxide. [Der Tagesspiegel, April 20, 2004]

According to estimates by the Federal Environment Agency in Berlin, around 8,000 tons of dust in the form of metal oxides, salts and unburned components of the rockets fall on New Year's Eve. [Bild der Wissenschaft on CD-ROM, 1997 [1996]]

Certain opaque colored glazes are achieved by adding appropriate metal oxides to the tin glaze. [Olbrich, Harald (ed.): Lexikon der Kunst. Berlin: Directmedia Publ. 2001 [1989], p. 8709]

Particularly high-melting and resistant products suitable for molding purposes are obtained by treating the fractions of fission fractions […] boiling below about 70–80 ° with air or oxygen under pressure. After distilling off, the residues are mixed with 15% metal oxides (iron oxide, nickel oxide, manganese oxide, aluminum oxide, zinc oxide, etc.) and further oxidized. [Scheiber, Johannes: Chemistry and Technology of Artificial Resins, Stuttgart: Wissenschaftl. Verl.-Ges. 1943, p. 148]