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Zircon
Classified as square system and shaped as
short and small column, it is sometimes
white, yellow, dark brown or black with
diamond blare. Its specific gravity is
4~4.9(lighter than iron and heavier than
Ti).With a hardness of 7~8,it has better
corrosive resistance than Ti, but similar to
Ta columbium.
It has good performance in taking in gases
(like oxygen, hydrogen, and nitrogen),
especially when heated. It can stand high
temperature with a melting point of1830℃.
Zircon is usually used in refractory
Materials (referred to as Zircon refractory
brick, such as Zircon corundum brick),
molding sand (for casting fine shapes),
ceramics and enamel wares, zircon
metal(sponge Zircon),alloy, glass, chemical
compounds (ZrO2, ZrClO2, Sodium Zirconate
Zirconium sulfate).
Standard specification of zircon:
|
NO |
Product |
(Zr.Hf)O2 |
TiO2 |
Fe2O3 |
P2O5 |
Al2O3 |
SiO2 |
|
1 |
High quality |
≥65.2 |
≤0.15 |
≤0.10 |
≤0.25 |
≤0.80 |
≤34.00 |
|
2 |
normal |
≥65 |
≤0.80 |
≤0.15 |
≤0.35 |
≤0.80 |
≤34.00 |
|
3 |
normal |
≥63 |
≤2.0 |
≤0.30 |
≤0.50 |
≤1.00 |
≤34.00 |
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