1mm thin-walled nuclear-grade zirconium crucible, research-grade, R60001

Baoji Furilong New Material Technology Development Co., Ltd. is located in Baoji City, known as "China's Titanium Valley." The company specializes in the production, OEM manufacturing, and sales of metal materials—such as zirconium, titanium, nickel, niobium, and tantalum—and various alloy products, as well as the export of these items. Equipped with advanced CNC machining centers and mature zirconium crucible processing technology, we transform your technical drawings into flawless finished products for delivery.

Product Description:
As a high-performance, corrosion-resistant vessel for laboratory and industrial use, the zirconium crucible plays a vital role in high-temperature chemical analysis and metallurgy. Thanks to zirconium's exceptionally high melting point and superior resistance to acid and alkali corrosion, it serves as an ideal vessel for many demanding chemical reactions.
Zirconium crucibles are widely used for sample preparation and high-temperature melting processes across sectors such as geology, metallurgy, the chemical industry, environmental protection, scientific research, and the nuclear industry.
Alkali fusion (primary application): In the analysis of geological minerals or ceramic materials, many minerals (such as silicates, zircon, and chromite) are highly resistant to dissolution in common acids. Analysts typically need to fuse samples at high temperatures using alkaline fluxes such as sodium peroxide ，sodium carbonate, or sodium hydroxide， Zirconium crucibles are the ideal vessels for this type of alkali fusion.

Rare and precious metal melting: Zirconium crucibles can be used to melt high-purity rare metals, specialty alloys, and certain superconducting materials under vacuum or inert gas protection.

High-temperature thermal analysis: Used as micro-containers for holding samples in certain high-temperature thermogravimetric analysis (TGA) or differential thermal analysis (DTA) applications.

1. Material Standards and Grades
Nuclear-grade zirconium crucibles are manufactured using low-hafnium, high-purity nuclear-grade zirconium/zirconium alloys, strictly adhering to ASTM B550 and GB/T 26314 nuclear-grade zirconium material specifications. Hafnium content is controlled to <0.01% (a core indicator for nuclear-grade materials; industrial zirconium-hafnium content is at most 2%, unsuitable for nuclear applications).

Mainstream Grades:

Zr702 (R60702, nuclear-pure zirconium): Zr+Hf≥99.2%, impurities at the ppm level, optimal plasticity, corrosion resistance, and neutron economy, suitable for laboratory and fuel preparation applications;
Zr-4/Zr-2.5Nb (Zr705): Zirconium-tin/zirconium-niobium nuclear alloy, high-temperature strength and radiation creep resistance, suitable for continuous high-temperature industrial applications;
Nuclear-grade raw materials must undergo zirconium-hafnium separation and purification, strictly controlling high-neutron-absorbing impurities such as boron, cadmium, and rare earth elements to avoid interfering with chain reactions.

2. Core Physicochemical Properties (Unique Advantages for Nuclear Operation)
* **Extremely Low Neutron Absorption Cross Section:** Zirconium's thermal neutron capture cross section is significantly lower than that of titanium, molybdenum, stainless steel, and graphite. It does not absorb neutrons and inhibit nuclear reactions, making it the only high-temperature crucible substrate suitable for nuclear fuel and irradiation experiments.
* **Ultra-High Temperature Stability:** Melting point 1852℃, long-term stable operating temperature ≤1700℃; low coefficient of linear expansion, strong thermal shock resistance, no cracking or deformation even after repeated temperature rises and falls.
* **Extreme Chemical Inertness + Radiation Corrosion Resistance:** Surface Self-Passivation ZrO₂ protective film, resistant to concentrated nitric acid, strong alkalis, molten uranium oxide, rare earth molten salts, and radioactive waste liquids; does not undergo solid-phase reaction with uranium, plutonium, rare earth, or zirconium alloy melts at high temperatures, preventing material contamination; only slightly corroded by hydrofluoric acid systems; Irradiation stable, no activation impurities; high-purity formula results in fewer activation products and a shorter half-life after irradiation, facilitating post-processing of nuclear waste; no carbon contamination from graphite crucibles, no silicon impurity precipitation from alumina crucibles; Mechanical and processing properties: Density 6.51 g/cm³, moderate weight for easy transport; forgeable, spin-formed, and precision CNC machined, dimensional tolerance ±0.1 mm, inner wall mirror polished Ra≤0.2 μm, molten material does not stick to the wall, discharges completely, and is easy to clean.

Tolerance for 1 mm wall-thickness zirconium crucible

Tolerances for 1mm Wall Thickness and Critical Dimensions 1. Wall Thickness Tolerance (Core): Standard tolerance of 1 ±0.05 mm or 1 ±0.10 mm. If the wall thickness is uneven (poor coaxiality), the crucible may warp during heating due to uneven thermal stress. 2. Diameter Tolerance (Outer Diameter/Inner Diameter): Outer diameter tolerance of ±0.10 mm to ±0.15 mm. If the crucible must fit into a specific heating sleeve or fixture, the outer diameter tolerance requires strict control; otherwise, the GB/T 1804-m (medium precision) standard generally applies. 3. Height Tolerance: ±0.20 mm. Height has a minimal impact on crucible performance, so the tolerance may be appropriately relaxed. 4. Geometric Tolerances (Critical for preventing deformation) Coaxiality: Coaxiality between inner and outer circles within ±0.05 mm. Roundness: Thin-walled components are highly prone to becoming elliptical; roundness should be controlled within 0.08 mm.

3. Mainstream Structural Specifications

Basic Styles: Straight-cylinder flat bottom, conical, low-profile, with flange seal, and matching zirconium crucible lid;
Size Range: Laboratory miniature 5–500mL, industrial grade large Φ10–700mm, height 25–900mm, wall thickness 3–30mm;
Forming Process: Vacuum forging, spin forming, high-purity argon-protected welding, powder metallurgy dense sintering, with no iron, copper, or silicon impurities mixed in throughout the process;
Factory Inspection: Full component spectrum inspection, neutron impurity screening, water pressure airtightness, high temperature thermal shock, surface cleanliness, non-destructive testing, and issuance of nuclear-grade material quality assurance documents.

Our finished products and shipping

Zircon crucible composition comparison

Why Choose Us

Technology and Quality: Located in Baoji, China's Titanium Valley, we possess professional production technology and extensive experience in non-ferrous metal manufacturing.

Global Coverage: We provide consistently high-quality products to customers in Australia, South Korea, Germany, the USA, the UK, Malaysia, and the Middle East.

Quality Commitment: We never compromise on quality and are responsible for every product we manufacture.

Technical Support: We have professional personnel overseeing the entire process from raw materials to finished products!

Our Factory

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Email: lucky@bjfreelong.com

WhatsApp: +86 13335371763

Please contact us for detailed quotations and technical specifications. We look forward to becoming your trusted high-end titanium materials partner.