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Corundum Planetary Ball Mill Jar 95% Al₂O₃ 50ml-2L Mohs 9 Isostatic

Price range: $130.00 through $497.00

Institutional Procurement & Supply Compliance: As a verified US supplier, Atomfair accepts formal institutional Purchase Orders (POs), contract billing schedules, and custom procurement loops for university and national laboratories, and corporate R&D departments globally.

95% Al₂O₃ corundum planetary ball mill jar, 50ml–2L. Mohs 9, isostatic pressed, 1600°C sintered. High-hardness mineral grinding. Vacuum jar customizable. For planetary ball mills. Lab & industrial grade.

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Description

CORUNDUM PLANETARY BALL MILL JAR 95% AL₂O₃ 50ML-2L MOHS 9 ISOSTATIC

RESEARCH GRADE MATERIAL

Product Overview
ATOMFAIR® Corundum Planetary Ball Mill Jar (95% Al₂O₃ ceramic jar) is manufactured from high-purity α-Al₂O₃ via 95% Al₂O₃ isostatic pressed 1600°C sintered integrated forming technology, delivering a fully densified, delamination-free, pore-free structure. With Mohs 9 no heavy metal contamination 1000°C performance—the highest hardness among conventional grinding jar materials—this jar is purpose-built for high-hardness mineral ultrafine grinding of quartz, feldspar, and refractory materials. The interior features a smooth arc-transition design without dead corners, preventing powder adhesion and enabling easy cleaning. The jar releases only trace aluminum elements with absolutely no iron, chromium, or nickel metal contamination. Standard volumes from 50 ml to 2 L are in stock with compatible stainless steel external clamp fixtures for mainstream vertical and horizontal planetary ball mills; 3 L, 5 L, large-capacity, and vacuum-sealed corundum jars are available upon custom order. Optimal grinding media pairing: corundum grinding balls or zirconia grinding balls (jar hardness ≥ ball hardness to prevent jar wear). This jar is not suitable for high-purity applications where aluminum impurities are unacceptable.

Technical Specifications
PARAMETER DETAILS
Material High-Purity α-Al₂O₃ (Al₂O₃ ≥ 95%); Optional: 92 / 99 Ceramic Grades
Manufacturing Process Isostatic Pressing Integrated Forming + 1600°C High-Temperature Densification Sintering
Hardness Mohs 9, HRC 80+ (Highest Among Conventional Grinding Jar Materials)
Density 3.6–3.9 g/cm³
Maximum Operating Temperature Long-Term: ≤1000°C; Short-Term: 1400°C
Wear Grade Excellent (Second Only to Zirconia Jars)
Chemical Stability Resistant to Weak Acids, Weak Alkalis, and Organic Solvents; Not Resistant to HF
Interior Structure Arc-Transition Smooth Surface, No Dead Corners, Dense Non-Stick Inner Wall
Defect Risk Brittle Ceramic; Low Impact Resistance—Cracking from Drops or Violent Impact
Compatible Equipment Vertical and Horizontal Planetary Ball Mills with Stainless Steel External Clamp Fixtures
Custom Configurations 3 L, 5 L, large-capacity, and vacuum-sealed corundum jars are available upon custom order. Please contact us via email at inquiry@atomfair.com.

Standard Size Specifications
NOMINAL VOLUME OUTER DIAMETER (mm) JAR BODY HEIGHT (mm)
50 ml 56 70
100 ml 70 72
250 ml 95 88
500 ml 106 112
1000 ml (1 L) 133 131
1500 ml (1.5 L) 132 141
2000 ml (2 L) 132 173

Key Features & Advantages
  • Ultra-High Hardness (Mohs 9)—Ideal for High-Hardness Mineral Grinding: Hardness exceeding agate and stainless steel ensures minimal jar wear when grinding quartz, feldspar, and refractory materials, delivering extended service life under demanding high-hardness material processing.
  • High-Temperature Stability up to 1000°C for Dry Grinding Processes: The jar maintains structural integrity and does not release impurities under high-temperature calcination and dry powder grinding conditions, supporting elevated-temperature material processing workflows.
  • Chemically Inert with Excellent Acid-Alkali Resistance: The dense sintered alumina structure resists corrosion in wet glaze and inorganic filler grinding applications, compatible with the majority of aqueous and organic slurry systems without degradation.
  • Smooth Arc-Transition Interior—No Dead Corners, Easy Cleaning: The integrated arc-molded inner wall prevents powder adhesion and material entrapment, enabling complete material discharge and simplified cleaning between different sample batches.

APPLICATION SCOPE: Ceramic and refractory industry: ceramic body materials, glazes, kaolin, quartz, feldspar, and refractory powder grinding. Building materials and minerals: calcium carbonate, talc, and various non-metallic mineral coarse and fine grinding. General chemical fillers: inorganic color powders, catalyst carriers, and general inorganic powder processing. Laboratory routine powder pretreatment: geological ordinary ores and inorganic oxides where zero aluminum impurity is not required. High-temperature powder dry grinding and pre-calcination powder refinement processes. Compatible with mainstream vertical and horizontal planetary ball mills using standard stainless steel external clamp fixtures.
OPTIMAL GRINDING MEDIA PAIRING: Corundum grinding balls or zirconia grinding balls only (jar hardness ≥ ball hardness to prevent jar wall wear). Strictly prohibited: WC cemented carbide balls and stainless steel balls—hard metal balls will scratch and erode the corundum inner wall, generating substantial aluminum debris contamination.
IMPORTANT NOTICE: Aluminum-sensitive materials strictly prohibited: lithium battery ternary/LFP materials, MLCC high-end electronic ceramics, pharmaceutical high-purity powders, and trace element analysis samples—grinding will introduce Al impurities; use agate or zirconia jars instead. Prohibit pairing with cemented carbide or stainless steel balls for extended grinding: metal hard balls will scratch and erode the corundum inner wall, producing significant aluminum debris contamination. Only corundum and zirconia grinding balls are permitted. Strictly avoid dropping from height and violent impact: corundum has high brittleness; dropping or collision easily causes cracking and renders the jar unusable—handle with care during transport and clamping. Avoid rapid thermal shock: direct water cooling after high-temperature grinding or rapid heating during frozen grinding will create invisible internal cracks leading to later fracture. Hydrofluoric acid (HF) prohibited: HF corrodes aluminum oxide crystals, causing jar dissolution and damage with substantial aluminum impurity release into the slurry. Replace damaged jars immediately: discard jars showing inner wall cracks, ceramic spalling, or chipping—continued grinding will release large amounts of aluminum oxide powder contamination into samples. For custom volumes and vacuum jar configurations, contact us at inquiry@atomfair.com.
TAILORED SOLUTIONS FOR RESEARCH
Contact our engineering team for technical support or official quotations.
EMAIL: inquiry@atomfair.com
Manufacturer: Atomfair LLC
Brand: ATOMFAIR®

Corundum grinding jars are designed for high-abrasion milling applications and exhibit superior hardness and chemical resistance. Optimal performance requires pairing with compatible grinding media such as zirconia spheres to prevent accelerated jar wear.

  • Material Composition and Stability: The corundum oxide matrix provides hardness second only to diamond and resists thermal shock and corrosive attack.
  • Grinding Media Compatibility: For maximum jar longevity, pair with zirconia milling spheres to form a wear-resistant system that minimizes ceramic degradation.
  • Operational Environment: The jars tolerate extreme thermal conditions and corrosive environments encountered in mineral, chemical, and pharmaceutical milling.

How does the corundum material hardness affect milling efficiency and contamination risk compared to other ceramic grinding jars?

The corundum structure provides a material hardness second only to diamond, offering maximum scratch resistance and limiting internal vessel breakdown during high-energy milling cascades. This ensures minimal contamination from jar degradation, making it ideal for high-purity applications like rare earth materials and advanced pharmaceuticals.

What milling media is recommended for use with these corundum grinding jars to achieve optimal wear resistance?

These corundum jars are designed to be paired with zirconia milling spheres, forming a classic wear-resistant combination that prevents jar degradation during heavy pulverization. The high-purity ceramic composition of the jars complements the hardness of zirconia media for extended service life.

What are the physical dimensions and weight of the 1000 ml corundum grinding jar for installation planning?

The 1000 ml (1L) model has an outer diameter of 142 mm, height without lid of 150 mm, height with lid of 160 mm, and a reference weight of 2.757 kg. These specifications are critical for ensuring proper fitment on roller mill hardware and for handling safety during setup.

These corundum grinding jars offer exceptional wear resistance and chemical inertness for demanding mineral and chemical milling, but their standard configuration is optimized for roller mills and lacks vacuum sealing, necessitating custom orders for specialized atmospheres.

Positive

  • Diamond-adjacent material hardness: The high-grade corundum oxide matrix provides a hardness second only to diamond, delivering maximum scratch resistance and limiting internal vessel degradation during high-energy milling cascades.
  • Chemical and thermal tolerance: The high-purity ceramic composition offers stable protection against aggressive oxidation, acid corrosion, and extreme thermal conditions, ensuring reliable performance in rigorous milling environments.

Trade-offs

  • Roller mill specific design: These grinding jars are purpose-built for roller mill applications and may not be compatible with other mill types (e.g., planetary ball mills) without adapter modifications, limiting deployment flexibility.
  • Vacuum-seal not standard: Standard jars do not include vacuum-sealed hardware; custom modifications are required for inert atmosphere milling, adding lead time and cost for sensitive material processing.

Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.

To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.

Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).

Additional information

Capacity

50ml, 100ml, 250ml, 500ml, 1000ml, 2000ml

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