Zirconium tungstate

Zirconium tungstate

White powder

Fixed

5.09 g · cm -3

Insoluble in water

Attention

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Zirconiumwolframat (Zr [ WO4 ] 2 ) is a chemical compound selected from zirconium, tungsten, and oxygen, and thus a compound from the group of tungstates.

Production and representation

Zirconiumwolframat can be obtained by reaction of zirconium ( IV) oxide and tungsten ( VI) oxide.

Properties

A very characteristic peculiarity of Zirconiumwolframat is the density anomaly. It pulls together when heated, unlike most other materials. This behavior occurs between -270 ° C (3.15 Kelvin) and 777 ° C, the linear expansion is 8.7 · 10-6 K -1. Some other materials also have a kind of " inverted" temperature behavior, but they show it in a much smaller temperature range.

Application

As a filler, it can be partially or fully offset the positive thermal expansion of a matrix material, resulting in materials with low thermal expansion.