Creuset en zirconium

Product Description

Excellent low cost replacement to platinum virtually eliminates sample contamination.

Benefit of using zirconium crucibles, they do not require platinum tipped tongs.

Zirconium crucibles are fragile! Handle carefully during unpacking, transportation, handling and cleaning.

Zirconium exhibits superb corrosion resistance in most organic and inorganic acids, salt solutions, strong alkalis and a few molten salts. An effective all round crucible for fusions employing sodium carbonate and sodium peroxide.

Heating zirconium produces a creamy white passive oxide film, corrosion barrier, stable in both reducing and oxidizing conditions. Check before heating any crucible for any micro-cracks, replace with new zirconium crucible.

Do not over load material in zirconium crucibles, this can increase the possibility of uneven heating.

Under vacuum, argon or helium zirconium crucibles can be heated to 1450°C otherwise temperature limit for use in air is 450˚C to 500˚C.

A slow heating 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.

DO NOT take zirconium crucibles directly out of furnace at high temperature otherwise they may crack. Recommend remove from heat when the temperature is under 100°C.

Zirconium crucibles should NOT be heated by torch or furnaces that cannot control temperature change rate. The uneven heating can cause cracks!

zirconium crucible for melting metal

UNS	Zr+Hf(≥)	Hf(≤)	Fe+ Cr	Sn	H(≤)	N(≤)	C	Nb	O(≤)
R60702	99.2	4.5	≤0.20	-	0.0094	0.02	0.05		0.16
R60703	98	4.5	-	-		0.025
R60704	97.5	4.5	0.20~0.40	1.0~2.0	0.005	0.025	0.05	-	0.18
R60705	95.5	4.5	≤0.2	-	0.005	0.025	0.05	2.0~3.0	0.18
R60706	95.5	4.5	≤0.2	-	0.005	0.025	0.05	2.0~3.0	0.16

Dimension 

Zr702 crucibles available in 1mm, 1.5 mm & 2mm as standard. Other thicknesses available upon request.

Zirconium Crucible Sizes
Capacity	Top Diameter	Bottom Diameter	Height
35 mL	40 mm	33 mm	40 mm
42 mL	45 mm	35 mm	44 mm
50 mL	45 mm	40 mm	42 mm
58 mL	50 mm	38 mm	45 mm