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{"title":"High-Purity Alumina A998 (99.8%) Ceramic Rings for 200mm and 300mm Semiconductor","imgUrl":"https:\/\/img.chinax.com\/nimg\/5e\/20\/9c3b2f69139599a22e566681737f-200x200-1\/high_purity_alumina_a998_2899_8_25_29_ceramic_rings_for_200mm_and_300mm_semiconductor_tools_with_exceptional_plasma_resistance.jpg","attrs":{"Material":"SiC","Composition:SiC":"\uff1e85%","Color":"Black","Density":"\u22653.65g\/cm3"}}
{"title":"High Purity Alumina Ceramic Crucibles with Custom Sizes for High-Temperature","imgUrl":"https:\/\/img.chinax.com\/nimg\/e2\/45\/c8d1900924e41525e0637839a922-200x200-1\/high_purity_alumina_ceramic_crucibles_with_custom_sizes_for_high_temperature_resistance_in_sintering_and_melting.jpg","attrs":{"Model Number":"Customizable","Brand Name":"KEGU","Place of Origin":"China","Price":"200-500 yuan\/kg"}}
Low-Sodium Alpha Aluminum Oxide (2-3μm) | White Alumina Ceramics for Vacuum Tubes & Extrusion
High-purity white alumina ceramics (Al₂O₃ ≥99.8%) with 2-3μm crystal size. Ideal for electric vacuum tube shells (dry pressing) and extruded ceramics. Excellent electrical insulation and sinterability.
Low-Sodium Alpha Aluminum Oxide for Advanced Technical Ceramics
Our high-purity white alpha aluminum oxide powders are engineered for demanding ceramic forming processes. With controlled crystal sizes (0.5-3.0μm) and ultra-low sodium content, they are the ideal choice for applications ranging from electric vacuum tubes to extruded wear-resistant parts.
Product Grades & Specifications
Parameter
Unit
TM-CB Series
TM-CC-1 Series
TM-CC-2 Series
Chemical Composition
Al₂O₃
%
≥ 99.8
≥ 99.4
≥ 99.7
Na₂O
%
≤ 0.05
≤ 0.35
≤ 0.10
SiO₂
%
≤ 0.04
≤ 0.05
≤ 0.04
Fe₂O₃
%
≤ 0.03
≤ 0.03
≤ 0.03
Physical Properties
Density
g/cm³
≥ 3.95
≥ 3.92
≥ 3.94
Original Crystal Size
μm
2.0 - 3.0
0.5 - 1.0
1.0 - 2.0
Particle Size (D50)
μm
4.0 ± 0.5
2.0 ± 0.5
2.0 ± 0.5
Note: 'V' variant grades (e.g., TM-CB-V) offer slightly adjusted purity with similar physical properties.
Application-Specific Product Guide
Key Features & Benefits by Series
TM-CB Series (e.g., TM-CB, TM-CB-V)
Superior Electrical Insulation: Essential for high-performance electric vacuum applications.
Excellent Grindability & Uniformity: 2-3μm original crystals ensure a uniform microstructure and superior surface finish after grinding.
Ideal for Metallization: The composition and structure provide an excellent substrate for subsequent metal coating processes.
TM-CC Series (e.g., TM-CC-1, TM-CC-2)
Enhanced Sinterability: Fine, reactive particles promote densification at optimized temperatures.
High Fired Density: Results in ceramic bodies with high mechanical strength and durability.
Uniform Shrinkage: Narrow particle size distribution ensures predictable and consistent dimensional control during firing.
