The Whole Basic Information Analysis of Zirconium Crucible
Core Texture and Performance Parameter.
Common Use Material
| Mater Mode | Chemical Composition | Application Scenarios | Advantages |
| Pure Industrial Zirconium Zr-702(R60702) | Zr≥99.2%,Impurity≤0.8% | Regular high temperature melting, chemical experiment, corrosion-resistance scenarios | Extremely excellent corrosion resistance, stable mechanical property from room temperature to600℃ |
| Zirconium Alloy Zr-705(R60705) | Zr+2.5% Nb | ≤800℃,high pressure and complicated corrosion scenarios | Higher tensile strength& better high-temperature creep than pure zirconium |
| Nuclear-class Zr Alloy(Zr-4/Zr-2) | Zr+Sn-Fe-Cr/Nb Alloy | Nuclear industrial special smelting(meet nuclear- level standard) | Tiny thermal neutron across-section,stable radiation ability |
Key mechanical Parameter
Density: 6.51g/cm³(Approximately 70% of stainless steel and 33% of Tungsten), obvious advantage of light-weight.
Thermal-Resistance: Long-term≤600℃(Pure Zirconium),≤800℃(Zirconium Alloy), short-term peak temperature can reach 1000℃(under inert gas protection)
Corrosion-Resistance: Forming compact ZrO₂ passivation coating on the surface which can resist the corrosion of hydrochloric acid, vitriol,nitric acid(except hydrofluoric acid), alkali and fuse slat, and the corrosion resistance is better than titanium and stainless steel, close to hastelloy.
Mechanical Property: Tensile strength 400-600MPa and elongation ≥15%, excellent ductility under high temperature and without cold shortness.
Chemical Durability: Non-React with oxygen,nitrogen under room temperature, need inert gas (argon) protection above 600℃ to avoid losing oxidization efficacy
Regular Dimension and Structural Style
Regular Dimension & Capacity(Customized)
| Specification Form | Parameter Range | Typical Dimension e.g. |
| Capacity | 10mL~50L(For Lab/50L~500L(Industrial) | 50mL/100mL/500mL/1L/5L/20L |
| OD*Height |
Small Size: Φ20×30mm~Φ100×150mm; Large Size: Φ300×500mm~Φ1000×1500mm |
Φ50×80mm(for Lab) Φ500×800mm(Industrial) |
| Thickness | 0.5mm~10mm(Customized) | Lab:0.8~2mm/Industrial:3~8mm |
| Structural style | With lid/Without lid/Spinning(Spun)/Welded |
Without Lid(Regular Smelting) With lid(Anti-Pollution) |
Technique Process
Raw material vacuum smelting purification → Forging → Cold Rolling/Hot Rolling → Suppress → Machining(Lathe/Polishing) → Welding(Large Size) → Vacuum Annealing(Stress Relief) → Surface Treatment( Acid Pickling oxide scale) → Quality Test(Dimension&NDT)
Main Application
Science&Research and Laboratory.
Material Science: Metal Powder(Titanium powder,Zirconium Powder) vacuum smelting, alloy chemical components adjustment experiment.
Chemical Experiment: High-temperature reaction with strong corrosive medium, sample digestion (replacement of platinum crucible to cut down the cost.)
Semiconductor: High-Purity material(like silicon, germanium)'s smelting and purification to avoid the impurities' pollution.
Industrial Production
Metallurgic Industry: Rare metal(Tantalum,Niobium,beryllium) smelting, casting, precious metal(gold, silver)refining.
Chemical Industry: Catalyst carrier and reaction vessel of high-temperature and high-pressure corrosive medium.
Nuclear Industry: Preparation of nuclear fuel component, special smelting container for nuclear waste treating process. (nuclear-level zirconium alloy)
Electronic Material: Optical glass, smelting and moulding of special ceramic to maintain the purity.
Other Special Scenarios
Aerospace&Aviation: Assembly unit of fuel stockpile and reaction (like liquid oxygen, kerosene) for spacecraft propelling system.
Medical Fields: Precision smelting for biomedical material, such as the zirconium based alloy implantation material.
precautions for product use
Corrosion Environment Restriction: Prohibited direct contact high-temperature medium with HF or fluoride ions which shall destroy the ZrO₂ passivation coating; To avoid the long-term use above 600℃,needs argon/nitrogen protection.
Temperature Control: Long-term application of pure zirconium crucible should be less than 600℃, overheating may lead oxidization accelerate and strength reduction.
Heating Method: Suitable for electric resistance furnace and induction furnace, refrain from direct firing the bottom of the crucible to avoid local overheating transformation.
Cleaning and Maintaining: To remove surface attachment with mixture liquid which contains dilute nitric acid and hydrofluoric acid (volume ratio 10:1) after using, vacuum preserve after airing to avoid oxidization.
Safety Specification: Avoid direct touch with strong reductive agent (like carbon and silicon) when smelting which may form zirconium carbon compound under high-temperature circumstances and then affect the lifetime of crucible. Slightly picking up and putting down when using to avoid the damage of the crucible wall thickness.
Standard and Suggestion of Model Selection
Core Operative Standard
International Standard: ASTM B523(zirconium and zirconium alloy pipe/plate)/ASTM B550(zirconium alloy forging) /ISO 6803(zirconium and zirconium alloy chemical components).
Key Point of Model Selection
Temperature Consideration: When ≤600℃ choosing pure zirconium Zr702, When ＞600℃ choosing Zr705.
Medium Consideration: Choosing Zr702 for strong corrosion scenarios (like concentrated hydrochloric acid and fuse salt), choosing Zr705 for complex situation (high-temperature+corrosion)
Capacity Consideration: 10ml-5L for laboratory use, 50L-500L for industrial use, customized for ultra-large-type.
Cost Consideration: The price of zirconium and zirconium alloy crucible is 2-3 times of titanium crucible, 8-10 times of stainless steel crucible, priority to the high-end scenarios which regular material cannot meet.
Conclusion
The core competitiveness of zirconium and zirconium alloy crucible is the comprehensive property under the dual scenarios of "high-temperature + strong-corrosion", especially irreplaceable ability in the fields of science&research experiment, rare metal smelting, nuclear industry. Requirement of temperature, medium, capacity should be considered when picking model to meet the corresponding material and dimension, strictly follow the usage specification to extend the service life spontaneously.
Monica
Position:Sales Manager
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E-mail: Cr-Re@titanmsgp.com
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