Why choose zirconia products?Zirconia
(ZrO2) products can withstand the high temperature up to 2100°C. It is an
ideal material for the melting of precious metals and super-alloys which have
melting point higher than 1800°C. What's the highest temperature that
zirconia products can withstand?Calcium-stabilized zirconia products can
withstand up to 2100°C (3812°F).
Yttrium-stabilized zirconia products can withstand up to 1500°C
(2732°F).
What's the chemical composition
of your calcium-stablized zirconia products?
*Yttrium-stablized zirconia components are available upon request.
What are the engineering
properties of your calcium-stabilized zirconia products?
How
to store zirconia products?Zirconia products should be stored in a dry
place. If they get wet, let the crucible dry naturally before using them. If dry
crucibles by placing in a dryer or oven, make sure that the dry process go slowly. What
should I pay attention to when I use zirconia products?- Zirconia
products are fragile. Please handle them carefully and avoid collision during
unpacking, transportation, handling and cleaning.
- Check whether any micro-cracks
exist before using zirconia products. Products with micro-cracks should not be
used.
- Do not load too many materials in zirconia crucibles, which can
increase the possibility of uneven heating.
- Slow ramp rate and cooling
rate are highly recommended to minimize the thermal shock on crucibles. When increasing
the temperature, special attention should be paid on two sensitive temperature
periods: not exceeding 3°C/MIN during 100°C ~300°C and 1050°C
~1200°C. The rate can be faster in other temperature ranges, but it is recommended
to be less than 5°C /MIN.
- To take the crucible directly out of furnace
at high temperature may cause crack. If possible, take it out when the temperature
is under 100°C.
- It is recommended to put some zirconia powder (around
100mesh) between the bottom of the crucible and the support of crucible to achieve
consistency in thermal expansion coefficient.
- If the crucible is used
in induction furnace, the crucible should be surrounded by zirconia powder.
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