Product Name:
High-Precision Single Crystal Alumina (Sapphire) Sleeve
Product Material:
High-Purity Single Crystal Alumina ($Al_2O_3$ > 99.99%), also known as Synthetic Sapphire.
Material Characteristics:
Extreme surface hardness (Mohs 9), Optically transparent, Zero porosity and gas permeability, Excellent thermal conductivity for a dielectric, Exceptional chemical resistance (inert to almost all acids/alkalis), High dielectric strength, Operates up to 2000°C.
Application Fields:
Plasma torch protection tubes, High-pressure water jet nozzles, NMR (Nuclear Magnetic Resonance) tubes, Semiconductor etching chamber viewports, High-purity chemical sensors, UV/IR lamp envelopes, Precision pump plungers for HPLC.
Application Industries:
Biomedical (Endoscopic components), Advanced Machinery (Waterjet cutting), New Energy (Lithium-ion battery monitoring), Fluid Control (Analytical chemistry), Electronic Engineering (High-power RF insulators), Aerospace (Optical windows and heat shields), Petrochemical (Deep-hole sensors), Broad Semiconductor (Plasma process components).
Processing Difficulties:
Extreme material hardness requires specialized diamond tooling and extremely slow feed rates, Fragility during thin-wall machining (high risk of cleavage), Achieving high surface finish ($Ra < 0.01\mu m$) to maintain optical clarity and prevent micro-cracks, Maintaining geometric precision (roundness and concentricity) across long-aspect-ratio sleeves.
Processing Flow:
Czochralski (CZ) or Kyropoulos crystal growth → Directional orientation (C-axis/A-axis) → Diamond wire sawing → Inner and outer diameter rough grinding → Precision diamond polishing → Chemical mechanical polishing (CMP) for mirror finish → Laser/Optical inspection for defects → Ultrasonic cleaning → Vacuum packaging.
Delivery Period:
Standard specifications: 30-45 days, Customized high-precision or optical-grade sleeves: 50-70 days.
Our Single Crystal Alumina (Sapphire) Sleeves represent the pinnacle of ceramic engineering. Unlike polycrystalline ceramics, the single-crystal structure eliminates grain boundary corrosion and particle shedding, making these sleeves indispensable for high-purity semiconductor and analytical environments. Sapphire’s unique combination of optical transparency and extreme mechanical durability allows for visual monitoring in high-pressure or corrosive reactors. These sleeves offer zero outgassing and remain stable at temperatures where metals and glass fail, providing a reliable barrier for sensitive sensors and plasma equipment.
Key Features:
Crystal Purity: No grain boundaries ensure zero contamination and extreme chemical resistance.
Optical Transparency: Allows for signal transmission (UV to IR) and visual inspection of internal processes.
Supreme Wear Resistance: Significantly outlasts ruby and tungsten carbide in abrasive environments.
Ultra-High Temperature Stability: Maintains structural integrity and insulating properties up to 2000°C.
Hermetic Integrity: Naturally non-porous structure is ideal for high-vacuum and high-pressure sealing.
