Creuset en zirconium

Zirconium Crucible Material Composition

Matériau	Composition chimique
	Zr+Hf	Sn	Fe	Cr	Ni	Hf	Nb
Zr 702	~99.5%	/	<0,05%	<0,05%	/	1~2.5%	/
Zr 704	~97.5%	1~2%	0.1~0.2%	0.1~0.2%	/	<4.5%	/
Zr 705	~95.5%	1~2%	<0,05%	<0,01%	/	<4.5%	2~3%
Zircaloy-2	~98%	1.2~1.7%	0.07~0.2%	0.05~0.15%	0.03~0.08%	<200ppm (pour l'industrie nucléaire)	/
Zircaloy-4	~98%	1.2~1.7%	0.07~0.2%	0.05~0.15%	<0,007%	<200ppm (pour l'industrie nucléaire)	/

Zirconium Crucible Mechanical Properties

Matériau	Résistance à la traction, ultimeMpa (ksi)	Résistance à la traction, limite d'élasticitéMpa (ksi)	Module d'élasticité Gpa (ksi)	Module de cisaillement Gpa (ksi)	Allongement à la rupture
Zr 702	450 (65.3)	325 (47.1)	99.3 (14400)	36.2 (5250)	32%
Zr 704	530 (76.9)	360 (52.2)	99.3 (14400)	36.2 (5250)	22%
Zr 705	600 (87.0)	500 (72.5)	97.9 (14200)	34.5 (5000)	20.0%

Zirconium Crucible Production Process

• Matières premières: Sélectionnez des produits de haute pureté zirconium powder.
• Métallurgie des poudres: Mélanger avec le liant et compacter en une billette verte.
• Frittage: Frittage à haute température pour éliminer le liant et augmenter la densité.
• Traitement thermique: Recuit pour réduire les tensions et améliorer les propriétés.
• Traitement de surface: Nettoyer et polir la surface.

Zirconium Crucible Surface Finish

Depending on the intended applications, the zirconium crucible has three main surface finishes as follows:

• Noir: La surface est "telle que sertie" ou "telle qu'étirée", conservant une couche de lubrifiants et d'oxydes de traitement.
• Nettoyé: La surface est nettoyée chimiquement pour éliminer tous les lubrifiants et oxydes.
• Sol: La surface est rectifiée sans centre afin d'éliminer tous les revêtements et d'obtenir un contrôle précis des dimensions.

Zirconium Crucibles Safety Precautions For Use

1. After use, store the zirconium crucible in a dry place to prevent rainwater intrusion. Before use, gradually heat it to 500°C.
2. Add materials according to the crucible’s capacity, avoiding overpacking to prevent cracking from the thermal expansion of the metal.
3. When removing the metal solution, use a scoop rather than calipers. If calipers or other tools are necessary, ensure they match the shape of the crucible to prevent localized pressure that could shorten its lifespan.
4. The crucible’s service life depends on usage. Avoid direct exposure to an oxidizing flame, as this can cause oxidation of the crucible material, leading to premature wear.

Zirconium Crucible Applications

• Metal Melting: Zirconium crucibles are commonly used for melting precious metals (such as gold, silver, platinum, etc.) and metals with high melting points (such as tungsten, molybdenum, titanium, etc.) because of their good resistance to high temperatures and corrosion.
• Chemical Experiments: Zirconium crucibles are used in laboratories for high-temperature chemical reactions, especially those experiments that require resistance to strong acids and bases as well as high-temperature corrosive environments.
• Industrie nucléaire: Due to the good neutron permeability of zirconium, zirconium crucibles are also used in the nuclear industry, especially in the production and handling of nuclear fuel.

Zirconium Crucible Packaging

The Zirconium Crucible is carefully placed in wooden cases or cartons with additional support from soft materials to prevent any shifting during transportation. This packaging method guarantees the integrity of the products throughout the delivery process.