Yellow Tungsten Oxide Ceramic Colorant

tungsten trioxide photo
ceramic with glaze picture Inquiry & Feedback

Yellow tungsten oxide because of its rich yellow, is commonly used as ceramic colorant. Yellow tungsten oxide, also known as tungsten trioxide or YTO, is a yellow powder or crystal with oblique symmetrical lamellar structure; under room temperature, the fresh tungsten trioxide appears in bright yellow which is changed by the changing of oxygen content; while, after set in the air for some time, because the reaction between yellow tungsten oxide and water and oxygen in the air, its color will turn to yellow green or green; In addition, the yellow of tungsten trioxide will aggravated to orange when heated.

Yellow tungsten oxide ceramic colorant has two main usages in the ceramic industry, one is as a coloring agent; the other is used for crystallization of glaze and crystallized glass-promoting crystallization agent (which itself can be an opacifying agent of the glazed). Such as tungsten trioxide in the brown crystalline glaze composition, which takes content of 5-25%; in addition, tungsten trioxide accounted for 20-30% of the blue crystalline glaze layer.

Ceramic colorants mostly are inorganic oxides, such as:
1. White-magnesia, magnesium carbonate, alumina, calcium borate, titanium oxide, zinc oxide, arsenic acid, antimony oxide, cerium compounds and metallic silver;
2. Gray - Platinum, iridium, rhodium, palladium, ruthenium, osmium soluble salts, antimony trioxide and iridium oxide ect;
3. Ink - iron oxide, chromium, cobalt, manganese, nickel and other mixtures, pyrolusite, iridium trioxide ect.;
4. Yellow - titanium oxide, rutile, barium stannate, chromic acid, lead chromate, cadmium sulfide, gold sulfide, gold ect.;
5. Orange - rutile, iron titanate, basic lead chromate, chromite, uranium yellow and cadmium sulfide.

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APT

Ammonium Paratungstate

Ammonium paratungstate (APT) is an important intermediate compounds of tungsten hydrometallurgical process, appearance is white crystalline powder, insoluble in water, soluble in alcohol and ether.
ammonium metatungstate

Ammonium Metatungstate

Ammonium metatungstate(AMT) is an important intermediate compounds of tungsten hydrometallurgical process, appearance is white crystalline powder, solubility in water is the largest in the tungsten compounds which over 300g WO3/100ml H2O (in 25℃).
sodium tungstate

Sodium Tungstate

Sodium tungstate, a tungstate of sodium, is useful as a source of tungsten. It is prepared from tungsten ores used to manufacture tungsten by reducing it.
tungstic acid

Tungstic Acid

Tungstic acid refers to hydrated forms of tungsten trioxide, WO3. The simplest form, the monohydrate, is WO3.H2O, the dihydrate WO3.2H2O is also known. The solid state structure of WO3. H2O consists of layers of octahedrally coordinated WO5(H2O) units where 4 vertices are shared.
blue tungsten oxide

Blue Tungsten Oxide

Blue tungsten oxide refers to a class of dark blue compound containing tungsten (Ⅵ) and tungsten (V) mixed valence state. Blue tungsten oxide is the product of reductant and tungsten compounds. Composition of blue tungsten oxide is complex, among which there are also intermediate oxides like WO2 and W4.
cesium tungstate bronze

Cesium Tungsten Bronze

Cesium tungsten bronze is inorganic nano material with good property in absorbing near-infrared with uniform grain size and dispersibility, it has strong absorbing function in near-infrared area with wave length 800~1200nm, also has high transmittance in visible light area with wave length 380~780nm.