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zirconium-crucibles-1

ZR0938 Zirconium Crucible (Zr Crucible)

Catalog No.ZR0938
MaterialHigh-purity zirconium and Zr alloys
StandardASTM / ASME
Purity99.5%~99.95%
ColorSilver
Density6.1g/cm3

TFM is a top supplier and manufacturer specializing in Zirconium crucibles and a broad range of Zirconium products. Customization options are available upon request.

Zirconium Crucible Introduction

Zirconium (Zr) is a silver-colored metal with a density of 6.52 g/cm³. Known for its small neutron adsorption cross-section and a relatively high melting point of 1855°C (3371°F), Zirconium stands out for its mechanical strength, especially at elevated temperatures. This makes zirconium crucibles ideal for melting various metals, outperforming most alternatives.

While Zirconium crucibles may be more expensive upfront compared to nickel crucibles, their durability offers significant long-term savings. The number of fusions they can withstand is far higher than other materials, making them more cost-effective in the long run.

Zirconium’s corrosion resistance is another key advantage, thanks to its natural oxide layer, zirconia, which forms almost instantly and provides exceptional protection against corrosion from almost all acids, except hydrofluoric acid (HF). Consequently, HF should never be used as a cleaning agent for zirconium crucibles.

Additionally, Zirconium crucibles require minimal maintenance and, unlike platinum, do not act as a catalyst for oxidation or other reactions, further enhancing their appeal in high-temperature metal melting applications.

Zirconium Crucible Specification

MaterialZr702, Zr704, Zr705
Thickness0.5~50mm
Diameter40~150mm
TypeCylinder zirconium crucible,

Tapered zirconium crucible,

Low-form zirconium crucible

Multiple sizes are available and we do make customized products. Please contact us for customized tungsten crucibles.

Composition of our Zirconium materials

Zr 702Zr 704Zr 705Zircaloy-2Zircaloy-4
Sn

/

1~2%

1~2%

1.2~1.7%

1.2~1.7%

Fe

<0.05%

0.1~0.2%

<0.05%

0.07~0.2%

0.07~0.2%

Cr

<0.05%

0.1~0.2%

<0.01%

0.05~0.15%

0.05~0.15%

Ni

/

/

/

0.03~0.08%

<0.007%

Hf

1~2.5%

<4.5%

<4.5%

<200ppm for the Nuclear industry

<200ppm for the  Nuclear industry

Nb

/

/

2~3%

Zn+Hf

~99.5%

~97.5%

~95.5%

~98%

~98%

Physical Properties

MaterialStateRm(≥)/MPaRp0.2(PaA50mm(≥)/%

Zirconium 702

(UNS R60702)

annealed

379

207

16

Zirconium 704

(UNS R60704)

annealed

413

241

14

Zirconium 705

(UNS R60705)

annealed

552

379

16

Applications of Zirconium Crucibles

Zirconium crucibles are not only vital for melting metals but also play a crucial role in other fields:

  • High-Temperature Superconductive Materials: Zirconium is used in the production of materials that exhibit superconductivity at high temperatures, enhancing their performance and stability.
  • Medical Equipment: In the medical field, zirconium is utilized in implants due to its biocompatibility and durability. Its properties make it an excellent choice for medical devices that require a combination of strength and resistance to bodily fluids.

Zirconium Crucible Packaging

Our Zirconium crucibles are carefully handled to prevent damage during storage and transportation and to preserve the quality of our products in their original condition.

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FAQ

A crucible is a heat-resistant container designed to hold materials during high-temperature processes such as melting, alloying, or chemical reactions. They’re essential in metal casting, laboratory analyses, and even certain thin-film deposition systems.

Crucibles are usually made from ceramics like alumina, zirconia, silicon carbide, or magnesia due to their high melting points and chemical inertness. Graphite and metal (e.g., steel) crucibles are also used for lower temperature applications.

The ideal crucible depends on the temperature and chemical nature of the process. Always select a crucible material with a melting point significantly higher than that of the material being processed and one that is chemically compatible to prevent reactions or contamination.

Always wear appropriate personal protective equipment (PPE) such as heat-resistant gloves, face shields, and aprons. Use proper tongs for handling, ensure adequate ventilation, and follow established protocols to avoid thermal shock and accidental spills.

Prior to use, crucibles are usually “dried” or pre-fired to remove moisture and avoid thermal shock. Some applications recommend a seasoning or “dressing” process to improve performance and extend the crucible’s lifespan.

Crucibles should be stored in a dry, well-ventilated area on wood shelving or other non-abrasive supports—not directly on concrete or metal floors—to avoid damage. They should also not be nested together to prevent chipping or cracking.

Yes, most crucibles are designed for multiple uses if they’re properly maintained and cleaned. However, frequent use at extreme temperatures or for reactive materials may eventually degrade them, in which case replacement is necessary.

Common challenges include cracking from rapid temperature changes (thermal shock), contamination from residual materials, and wear or erosion from high-temperature exposure. Following proper handling and maintenance guidelines helps mitigate these issues.

Allow the crucible to cool completely, then remove any residues with a suitable scraper or chemical cleaner if recommended. Some crucibles benefit from an acid wash to remove stubborn deposits—but always follow the manufacturer’s guidelines to prevent damage.

Ensure the crucible is pre-heated and free of moisture. Load the material slowly and evenly using appropriate tools to prevent splashing or uneven heating. For heavy or large pieces, use tongs or specialized equipment to maintain safety and consistency.

In metal casting, crucibles are used to melt and hold metals for forming alloys or casting components. In evaporation processes (e.g., thin-film deposition), they heat materials to their vaporization point, allowing controlled deposition onto substrates.

Their ability to withstand extreme temperatures and resist chemical reactions makes crucibles indispensable. They enable precise control over high-temperature processes in metallurgy, materials science, and chemical analysis, ensuring product quality and process reliability.

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