Metal oxides for a colorful life
Metal oxides are compounds between metal and oxygen. Due to their properties, many oxides find extensive technical use, for example in corrosion protection, in catalysis, in fuel cells or ceramics. They are also of great importance when used as a pigment.
Pigments give paints, lacquers and crayons their hue and are used to color textiles, plastics, cosmetics and candles. They can be divided into inorganic and organic pigments. Of course, metal oxides belong to the first group. Even early humans used inorganic pigments in the form of earth colors for their cave paintings. Types of earth get their different colors from the metal oxides they contain. Pigments made from metal oxides can occur both naturally and synthetically. For economic reasons, nowadays mainly synthetically produced metal oxide pigments are used.
Metal oxides and their coloring
Titanium dioxide is the best known and most widely used white pigment. Colored products also contain white pigments to achieve high coverage. The mineral rutile is often used to produce titanium dioxide.
Cobalt oxides, in turn, produce intense light to dark blue shades. Cobalt II oxide is used here as a raw material for the ancient pigment “smalt”, which is used in the ceramics industry, among other things. Cobalt III oxide and cobalt II / III oxide are also blue pigments for coloring glass, ceramics, porcelain or enamel.
The earth colors already mentioned often get their color from the iron oxides they contain. Iron III oxide, also called iron oxide red, is the main component of the natural red earth and gives it a red-orange or deep red color. Iron oxide yellow, on the other hand, as the name suggests, is used as a yellow pigment. Iron-II / III-oxide gives a black color and is also used as a magnetic pigment for data storage or for audio or video tapes.
Manganese oxides in the glass industry
Manganese oxides are also widely used as pigments. Manganese II oxide can be used as a green pigment and Manganese III oxide can be used to color glass brown. Manganese IV oxide, known as “glassmaker’s soap”, on the other hand, is used to neutralize discoloration in the glass melt.
Copper (II) oxide is used as a pigment for coloring glass, ceramics or porcelain. Copper-I-oxide also gives these products a red color.
The ceramic industry often uses tungsten trioxide as a yellow pigment. Chromium III oxide, also called chromium oxide green, is an olive green pigment for coloring glass or enamel.
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ARTICLE NUMBER: 1317-80-2
CAS NO .: 1317-80-2
FORMULA: TiO 2
MOLECULAR WEIGHT: 79.87 g / mol
ARTICLE NUMBER: 1307-96-6
CAS NO .: 1307-96-6
MOLECULAR WEIGHT: 74.93 g / mol
ARTICLE NUMBER: 1308-06-1
CAS NO .: 1308-06-1
FORMULA: Co 3 O 4
MOLECULAR WEIGHT: 240.80 g / mol
ARTICLE NUMBER: 3250053
CAS NO .: 1344-43-0
MOLECULAR WEIGHT: 70.94 g / mol
ARTICLE NUMBER: 1317-35-7
CAS NO .: 1317-35-7
FORMULA: Mn 3 O 4
MOLECULAR WEIGHT: 228.81 g / mol
ARTICLE NUMBER: 1313-13-9
CAS NO .: 1313-13-9
FORMULA: MnO 2
MOLECULAR WEIGHT: 86.94 g / molngan IV oxide
ARTICLE NUMBER: 1317-38-0
CAS NO .: 1317-38-0
MOLECULAR WEIGHT: 79.55 g / mol