Sapphire Balls Precision Bearings High-Performance Components Wear Resistance
Sapphire bearing balls are precision-engineered spheres made from synthetic sapphire (Al₂O₃), the crystalline form of corundum. Renowned for their exceptional hardness, second only to diamond, these balls offer outstanding wear resistance, dimensional stability, and thermal resilience. Their unique properties make them indispensable in applications demanding durability and precision, such as aerospace, biomedical instruments, and high-vacuum environments.
Key Technical Specifications
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Parameter
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Value
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Crystal Structure
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Monocrystalline hexagonal rhombohedral
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Composition
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Al₂O₃ (synthetic sapphire)
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Purity
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99.99%
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Density
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~3.99 g/cm³
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Mohs Hardness
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9
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Knoop Hardness
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~2200 (C-axis), ~1800 (perpendicular to C-axis)
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Young's Modulus
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~440 GPa
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Melting Point
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~2050°C
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Thermal Conductivity
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~40 W/m·K at 300 K
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Thermal Expansion Coefficient
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6.2 × 10⁻⁶ /°C (parallel to C-axis), 5.4 × 10⁻⁶ /°C (perpendicular to C-axis)
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Electrical Resistivity
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>10¹² Ω·cm (insulator)
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Dielectric Constant
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10.6 (parallel to C-axis), 8.6 (perpendicular to C-axis)
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Sapphire Balls Key Characteristics
•Exceptional Hardness & Wear Resistance: With a Mohs hardness of up to 9 (second only to diamond), it significantly withstands wear in high-friction environments, ensuring an exceptionally long service life.
•High Thermal Stability: A melting point of approximately 2050°C allows it to function effectively in extreme high-temperature environments while maintaining stable performance.
•Chemical Inertness: It exhibits strong resistance to most acids and alkalis, making it suitable for harsh chemical environments without being easily corroded.
•Dimensional Stability: It maintains its shape under mechanical and thermal stress, which is crucial for precision applications.
•Electrical Insulation: With a high electrical resistivity (>10¹⁶ Ω·cm), it is an ideal choice for applications requiring non-conductive materials.
•Optical Transparency: It offers good light transmission across a broad spectrum from ultraviolet to mid-infrared, suitable for scenarios where optical visibility and light transmission are critical.
Sapphire Bearing Balls Applications
•Precision Bearings: Used in instruments like mechanical watches and gyroscopes, providing low friction and high durability, thereby enhancing equipment accuracy and lifespan.
•Optical Systems: Applied in fiber optic connectors, laser systems, and optical alignment devices. Their high hardness and smoothness ensure the precision and stability of optical components.
•Metrology Instruments: Integrated into measuring devices such as flow meters and barcode scanners, ensuring high precision and reliable measurement results.
•Aerospace & Biomedical Devices: Employed in environments demanding high reliability and performance, such as navigation systems or precision components in certain medical devices.
Available Grades & Sizes
•Grades: Typically available in various grades from G1 to G25, differentiated based on international ball grade standards for dimensional tolerance and sphericity accuracy to meet stringent precision requirements in diverse applications.
•Sizes: Diameters generally range from 0.16 mm to 150 mm, and custom sizes can be provided according to specific customer needs, offering high flexibility.
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About ZMSH
ZMSH is a high-tech enterprise specializing in the R&D, manufacturing, and sales of sapphire glass, with 10 years of industry experience. Our product range includes sapphire wafers, optical windows, and precision components. We hold CE and CCC certifications, ensuring our products meet international standards and are exported to over 80 countries and regions worldwide. Leveraging full-industry-chain equipment (from crystal growth to precision polishing), we guarantee integrated processes and controllable quality, backed by a 1-year quality assurance commitment. Our company boasts a professional sales and technical support team, providing 24/7 customized services, and is dedicated to delivering reliable solutions for the semiconductor, optical, and high-end manufacturing industries.
Sapphire Balls Q&A
Q1: What are sapphire balls used for?
A1: Sapphire balls are primarily used in high-precision applications like fiber optic connectors, precision bearings, flow meters, and barcode scanners due to their exceptional hardness, wear resistance, and thermal stability.
Q2: Why choose sapphire balls over other materials?
A2: They are chosen for their superior properties, including a Mohs hardness of 9 (second only to diamond), resistance to high temperatures (up to ~1800-2000°C), and excellent chemical inertness, which significantly extend component life in harsh environments.
Tag: #Sapphire Balls, #Customized, #Al₂O₃ Single Crystal, # Precision Bearings , #Sapphire, #High-Performance Components, # Wear Resistance
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