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{"title":"Dense And Non-Porous Alumina Ceramic Ring Component For Electronics And","imgUrl":"https:\/\/img.chinax.com\/nimg\/22\/55\/13f6a2b1747ed18d79b1a2c6608a-200x200-1\/dense_and_non_porous_alumina_ceramic_ring_component_for_electronics_and_semiconductors.jpg","attrs":{"Place of Origin":"Made in China\uff0cZhejiang\uff0cJinhua","Brand Name":"Dayoo","Minimum Order Quantity":"as negotiated and agreed","Price":"as negotiated and agreed"}}
{"title":"Hardness HRA90-92 Alumina Ceramic Ring","imgUrl":"https:\/\/img.chinax.com\/nimg\/a8\/31\/1f1ea4b5e81eefc4c7758960d440-200x200-1\/hardness_hra90_92_alumina_ceramic_ring.jpg","attrs":{"Place of Origin":"Made in China\uff0cZhejiang\uff0cJinhua","Brand Name":"Dayoo","Minimum Order Quantity":"as negotiated and agreed","Price":"as negotiated and agreed"}}
{"title":"Wear-Resistant Alumina Ceramic With High Flexural Strength And Low Thermal","imgUrl":"https:\/\/img.chinax.com\/nimg\/de\/42\/e50649708b09dc0916968b0264f4-200x200-1\/wear_resistant_alumina_ceramic_with_high_flexural_strength_and_low_thermal_expansion_coefficient.jpg","attrs":{"Place of Origin":"Made in China\uff0cZhejiang\uff0cJinhua","Brand Name":"Dayoo","Minimum Order Quantity":"as negotiated and agreed","Price":"as negotiated and agreed"}}
{"title":"Alumina Ceramic Components For Thermocouple Protection Tubes And High-Temperatur","imgUrl":"https:\/\/img.chinax.com\/nimg\/5c\/ac\/1a83b504097030be0c82277ce186-200x200-1\/alumina_ceramic_components_for_thermocouple_protection_tubes_and_high_temperature_furnace_plates_in_industrial_heating.jpg","attrs":{"Place of Origin":"Made in China\uff0cZhejiang\uff0cJinhua","Brand Name":"Dayoo","Minimum Order Quantity":"as negotiated and agreed","Price":"as negotiated and agreed"}}
{"title":"Precision-Engineered Alumina Ceramic Valve Core Washers For High-Temperature And","imgUrl":"https:\/\/img.chinax.com\/nimg\/02\/9a\/9df3093fb4c9c3fe5430c302d3ef-200x200-1\/precision_engineered_alumina_ceramic_valve_core_washers_for_high_temperature_and_high_performance_applications.jpg","attrs":{"Place of Origin":"Made in China\uff0cZhejiang\uff0cJinhua","Brand Name":"Dayoo","Minimum Order Quantity":"as negotiated and agreed","Price":"as negotiated and agreed"}}
Alumina ceramic shield rings are high-performance annular protective components manufactured from high-purity alumina (Al₂O₃ content 95%-99.99%). These ivory white or beige-yellow components feature dense texture and high surface finish, designed to provide protection, isolation, support, and insulation functions in various equipment applications.
Primary Applications
Application Field
Specific Uses
Semiconductor Manufacturing
Etching equipment chamber protection, plasma bombardment barrier, deposition process mask
Vacuum Coating Equipment
Protective ring surrounding heaters and susceptors, sputtering process anti-deposition shield
Excellent chemical stability resistant to acid and alkali corrosion
Precise dimensional control with micron-level tolerances
Non-toxic and environmentally friendly material
Technical Specifications
Parameter
Typical Value/Range
Remarks
Alumina Content
95% - 99.99%
Customizable according to requirements
Bulk Density
3.64 - 3.98 g/cm³
Increases with purity
Flexural Strength
310 - 380 MPa
Up to 500MPa or more
Compressive Strength
2550 - 3500 MPa
Extremely strong load-bearing capacity
Hardness
14 - 30 GPa (≈1440-3060 kg/mm²)
Increases with purity
Dielectric Strength
16.9 - 24 kV/mm
Excellent electrical safety performance
Volume Resistivity
>1×10¹⁴ Ω*cm
Extremely high at room temperature
Thermal Expansion Coefficient
7.2 - 8.4 ×10⁻⁶ /℃ (20-1000℃)
Good dimensional stability
Thermal Conductivity
32 - 42 W/m*K
Increases with purity
Maximum Operating Temperature
1600 - 1800 ℃
Under no-load conditions
Thermal Shock Resistance
220 - 320 ℃
Withstands rapid temperature changes
Water Absorption
0%
Fully dense, good airtightness
External Dimensions
OD 50-500mm, Thickness 5-50mm
Customizable according to drawings
Manufacturing Process
Raw Material Preparation: High-purity alumina powder ball-milling and mixing
Molding Process: Dry pressing, isostatic pressing, or hot pressing casting
Green Body Machining: Trimming after molding with machining allowance
High-Temperature Sintering: Pressureless sintering at 1600-1700℃
Precision Machining: Grinding and lapping using diamond abrasives
Quality Inspection: Full dimensional and performance testing
Cleaning and Packaging: Vacuum or cleanroom packaging
Installation & Usage Guidelines
Installation Precautions:
Confirm installation orientation and positioning surfaces
Perform trial assembly before formal installation
Use soft pads or gloves when handling
Ensure clean contact surfaces free of particles
Consider shrink fit assembly for interference fits
After-Sales Service
Customization service for dimensions, purity, and tolerances
Professional technical consultation and design guidance
100% inspection before shipment with material reports
24-hour response to customer issues
Strict batch-to-batch consistency control
Small batch support for R&D and trial production
Frequently Asked Questions
Q1: What is the difference between alumina ceramic shield rings and ordinary ceramic rings?
A: Shield rings are specifically designed for protection functions with precise positioning surfaces, step structures, and strictly controlled fit dimensions to ensure accurate resetting with each replacement.
Q2: What temperature can the product withstand? How is its thermal shock resistance?
A: Maximum operating temperature reaches 1750-1800℃ for high-purity alumina. Thermal shock resistance is approximately 220-320℃, capable of withstanding thermal shock tests with 500℃ temperature differences.
Q3: What level of dimensional accuracy can the shield rings achieve?
A: Standard products achieve outer and inner diameter tolerances of ±0.05mm. Precision grinding can achieve tolerances up to ±0.01mm, with concentricity and parallelism controlled within 0.02mm.
Q4: Are ceramic shield rings easy to break? What should be noted during installation?
A: Alumina ceramics have high hardness but some brittleness. Avoid hammering, dropping, or forced hammering during installation. Use shrink fit assembly or flexible gaskets, and wear gloves when handling.
Q5: Can shield rings be reused after cleaning?
A: Yes, as long as there are no cracks or chipping on the surface. Inspect critical dimensions and surface condition after each cleaning cycle.
Q6: Do you provide samples for testing? What is the minimum order quantity?
A: Small batch samples are available for testing and verification. Minimum order quantities for batch orders are negotiable based on product size, with special support for R&D requirements.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter
Total Annual:
>1000000
Employee Number:
>100
Ecer Certification:
Verified Supplier
We are a company with many years of experience in the production of special precision ceramics and the ability to design, manufacture, process and sell structural and functional parts of various special precision ceramics.
Deyu Precision Ceramics Technology Co., Ltd. has many years of e... We are a company with many years of experience in the production of special precision ceramics and the ability to design, manufacture, process and sell structural and functional parts of various special precision ceramics.
Deyu Precision Ceramics Technology Co., Ltd. has many years of e...