2mm thick Zr705 (R60705 / Zr-2.5Nb) research zirconium crucible

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 grade standards

The Zr705 zirconium crucible base material is a zirconium-niobium alloy Zr-2.5Nb, conforming to the American standard UNS R60705 and the standards ASTM B550 and GB/T 8769, which is different from pure zirconium Zr702. The alloy matrix contains 2.0% to 3.0% metallic niobium, with the balance being zirconium + hafnium (Hf≤4.5%), and the total impurities of Fe+Cr ≤0.2%, with strictly controlled oxygen content.

2. Core Physical and Mechanical Properties (Core Advantages Compared to Pure Zirconium Zr702)

High Temperature Resistance: Melting point 1852℃, long-term stable operating temperature ≤1800℃, far superior to titanium and stainless steel crucibles; does not soften, deform, or leak at high temperatures.

High Strength and Toughness: Tensile strength ≥550MPa, approximately 45% higher than pure zirconium Zr702; strong resistance to high-temperature creep; impact and thermal shock resistant, suitable for thin-walled, large-size crucibles; lighter weight for the same volume, less prone to cracking; maintains good plasticity at both low and high temperatures; not easily fatigued or damaged by repeated temperature changes.

Extreme Corrosion Resistance: Forms a dense, self-healing ZrO₂ passivation film on the surface, resistant to boiling concentrated hydrochloric acid, dilute sulfuric acid, phosphoric acid, hydrofluoric acid, and various organic acids, strong alkalis, molten alkaline salts, and molten fluorides; almost no ion precipitation under high-temperature, highly corrosive conditions, does not contaminate materials.

Low impurities, high purity isolation: Extremely low impurities ensure that the smelting/dissolving process does not introduce impurities such as iron, nickel, and chromium, significantly reducing costs compared to platinum crucibles; non-magnetic and does not adsorb precious metals or rare earth melts.

3. Production Process and Specifications
Forming process: Spin forming, forging + machining, seamless welding; weld corrosion resistance consistent with the base material; mirror polished surface Ra0.2～3.2μm, free of sand holes and pores.

Standard specifications: Laboratory miniature 5ml～500ml; Industrial large crucibles: diameter 10～700mm, height 25～900mm, wall thickness 3～30mm; customizable straight, conical, capped, spouted, and rectangular irregular-shaped crucibles are available.

Supply condition: Annealed, eliminating processing stress and enhancing thermal stability.

Zircon crucible composition comparison table

Zircon crucibles only use the method

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Product shipping and packaging

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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!

Contact Us

Our team is dedicated to serving you and hopes that every product you purchase will meet your expectations!

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.