Zirconia Technical Information

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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-stablized 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.
Zirconia crucibles should not be heated by torch or furnaces that cannot control temperature change rate. The uneven heating can cause crack.
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.