Product Description
Alumina ceramic crucibles are made of high-purity alumina raw materials, processed by precision and sintered at high temperatures. They have excellent high temperature resistance, corrosion resistance and chemical stability, and are ideal for metal smelting, glass manufacturing, semiconductor production and laboratory analysis.
Product Features
✅Purity ladder design
95%: general industrial grade, the best choice for cost performance
99%: semiconductor grade, sodium and potassium ion content <10ppm
99.9%: scientific research grade, iron and titanium impurities <1ppm
✅Structural innovation
Inner wall nano-coating technology (optional): reduce metal wettability and improve de-molding efficiency
Bottom thickening design: uniform heat dissipation to prevent local overheating
✅Environmental protection characteristics
Comply with RoHS/REACH standards
Production energy consumption is 15% lower than the industry average
Technical Specifications
| Item | 95% Alumina Crucible | 99% Alumina Crucible | 99.9% Ultra-High Purity Crucible |
| Al₂O₃ Content | ≥95% | ≥99% | ≥99.9% |
| Density | 3.7-3.8 g/cm³ | 3.9-4.0 g/cm³ | 4.0-4.05 g/cm³ |
| Compressive Strength | ≥350 MPa | ≥450 MPa | ≥500 MPa |
| Max Service Temperature | 1700°C | 1850°C | 1900°C |
| Thermal Expansion Coefficient | 7.5×10⁻⁶/°C (20-1000°C) | 7.2×10⁻⁶/°C (20-1000°C) | 6.8×10⁻⁶/°C (20-1000°C) |
| Surface Roughness | Ra ≤ 0.8 μm | Ra ≤ 0.4 μm | Ra ≤ 0.2 μm |
| Custom Size Tolerance | ±0.1 mm | ±0.05 mm | ±0.02 mm |
Application range
✅Metal smelting: suitable for the smelting and refining process of high-temperature alloys, non-ferrous metals, and precious metals to ensure the purity and quality of the alloys.
✅Glass manufacturing: used in the melting and forming process of special glass, electronic glass, and optical glass to improve the transparency and purity of the glass.
✅Semiconductor production: in the process of semiconductor material preparation and electronic component manufacturing, it is used as a key tool for melting and heat treatment.
✅Laboratory analysis: as a special vessel for the melting process of metal and non-metal samples, it is used for various chemical composition analyses and research.
Technical specifications
Material composition: more than 99% high-purity alumina (Al₂O₃)
Density: ≥3.8 g/cm³
Maximum operating temperature: 1800℃ (short term) / 1650℃ (long term)
Thermal shock stability: ΔT≥300℃ (no cracking during rapid cooling and heating)
Size range: inner diameter 10 mm~500 mm, customization supported
Surface finish: Ra≤0.2μm (polishing optional)
Product Features & Benefits
Resistant to extremely high temperatures: Suitable for high-temperature scenarios such as molten metal, glass, rare earth materials, etc.
Chemical inertness: Resistant to acid and alkali corrosion, avoiding experimental/production pollution.
Low thermal expansion coefficient: Dimensionally stable at high temperatures, extending service life.
High mechanical strength: Mohs hardness level 9, wear and impact resistance.
Cost advantage: Direct supply from the source factory: 20-30% lower than the agent price,
Life cycle cost: 4 times that of graphite crucible, annual maintenance cost reduced by 60%
Customer value
✅ Reduce costs: The service life is 3-5 times that of ordinary graphite crucibles
✅ Improve precision: High-purity materials ensure the accuracy of experimental data
✅ Environmentally friendly and safe: No toxic substances are released, in compliance with RoHS/REACH standards
Manufacturing Process
Raw material processing: nano-alumina powder + precision formula additives
Molding process: isostatic pressing (CIP) to ensure uniform density
Sintering technology: atmosphere protection kiln above 1700℃, microcrystalline structure control
Quality inspection process: X-ray flaw detection + size laser detection
(Emphasis on technical barriers and quality control, to improve trust)
Export Markets
Main customer countries: United States, Canada, Germany, Japan, South Korea, Australia, United Arab Emirates, etc
Manufacturing Process
Raw material processing: nano-alumina powder + precision formula additives
Molding process: isostatic pressing (CIP) to ensure uniform density
Sintering technology: atmosphere protection kiln above 1700℃, microcrystalline structure control
Quality inspection process: X-ray flaw detection + size laser detection
FAQ
Q1: How to choose the appropriate crucible purity?
A: According to the usage scenario: 95% for industrial smelting, 99% for semiconductors/lithium batteries, and 99.9% for scientific research experiments
Q2: Does it support non-standard design?
A: Yes, samples can be produced in as fast as 7 days
Q3: What are the guarantees for packaging and transportation?
A: Shockproof foam + wooden box packaging, in line with international logistics standards, breakage rate <0.3%
Q4: How to verify product quality?
A: Provide third-party test reports, support customers' on-site factory inspections
Product Tags:
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Alumina Ceramic Crucible Supplier Custom High-Temperature Resistant Crucibles for Lab Industry Premium Alumina Ceramic Crucible 99.9% Purity Images
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