Four point chemical properties of zirconia products


1.zirconia if used in accordance with the specifications and storage is not decomposed, there is no known risk response, to avoid acid. Insoluble in water, soluble in hot concentrated hydrofluoric acid and sulfuric acid. The corresponding zirconium acid salt can be formed by alkali co melting. Stable chemical properties.

2.zirconia fiber is a new crystalline inorganic fiber material with ZrO2 as the main component. Good chemical stability and oxidation resistance, impact resistance, excellent performance of sintering.

3.its crystal form has many varieties, low temperature for the single crystal system, high temperature for the tetragonal type, more high temperature for cubic crystal. The crystal form of the tetragonal crystal is changed to 1170 degrees, and then heated to 2370 degrees Celsius. Soluble in sulfuric acid and hydrofluoric acid. Good thermal stability, high temperature conductivity, high temperature strength and toughness.

4.zirconia fiber is a kind of amorphous refractory fiber material. Relative density 5.6 ~ 6.9. Chemical stability and oxidation resistance, thermal conductivity is small, has the impact resistance, can be sintered, etc.. Due to the high melting point of ZrO2 material itself, oxidation and other excellent high temperature properties, the ZrO2 fibers compared with alumina fiber, Mo mullite fiber, aluminum silicate fiber and other refractory fiber varieties of higher temperature. Zirconia fiber in more than 1500 DEG C ultra high temperature oxidation atmosphere for long-term use, maximum use temperature up to 220 DEG C, even to 25 DEG C can still maintain a complete fiber shape and high chemical stability, corrosion resistance, antioxidant, thermal shock, no volatilization, no pollution, is the eye before the top of a refractory fiber material. The acid and alkali corrosion resistance of ZrO2 is much stronger than SiO2 and Al2O3. Insoluble in water, soluble in sulfuric acid and hydrofluoric acid; slightly soluble in hydrochloric acid and nitric acid. Can be fused with alkali to produce zirconium acid salt.


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