Refractory Ceramic Fiber Board For Vacuum Furnace (1260℃) - High-Rigidity Insulation For Precision High-Temp Equipment

1. Product Overview

This Vacuum Furnace Ceramic Fiber Board is manufactured via advanced wet vacuum forming processes: first, high-purity alumina-silica fibers (3-5μm diameter, ensuring uniform heat insulation) are dispersed into a stable slurry with trace inorganic binders (organic content ≤7%, avoiding vacuum pollution); then, vacuum suction dewatering (negative pressure ≥0.09MPa) forms dense, flat fiber sheets; next, low-temperature drying (120℃) removes moisture without damaging fiber structure; finally, high-temperature calcination (800-1000℃) burns off residual organics and enhances rigidity. Unlike soft ceramic fiber blankets, its vacuum-formed dense structure (bulk density 220-500kg/m³) ensures no fiber shedding-critical for maintaining vacuum furnace cleanliness-and flatness tolerance ≤0.5mm/m, fitting seamlessly with furnace walls. The product is supplied in standard sizes (600×400mm, 900×600mm, 1200×1000mm, thickness 10-50mm) with vacuum-sealed plastic + fumigated cartons, preventing moisture absorption during transportation.

2. Key Features

Vacuum-Scenario Adaptability: Low organic content (≤7%)-no volatile gases released at high temps to contaminate vacuum environment; fiber shedding rate ≤0.1% (1200℃, 3h), ensuring furnace cavity cleanliness for precision heat treatment (e.g., metal alloy annealing).

High-Temp Stability: Working temp ≤1260℃, shrinkage ≤-3% (1000℃, 3h)-withstands long-term operation in vacuum furnace hot zones (1000-1200℃) without deformation or thickness reduction, maintaining consistent insulation performance.

Efficient Insulation & Rigidity: Thermal conductivity 0.132-0.180 W/m·K (800-1000℃)-reduces vacuum furnace heat loss by 30% vs. ordinary refractory bricks; ultimate strength ≥0.5 MPa, resisting pressure from furnace clamping structures without cracking.

Precision Machinability: Surface smoothness Ra ≤2μm, can be cut, drilled, or milled into complex shapes (e.g., circular holes, notches) with tolerance ±0.1mm-matching irregular vacuum furnace components like door seals and heating element shields.

Lightweight & Easy Installation: Bulk density 220-500kg/m³ (1/5 of dense refractory boards), single 900×600×25mm board weight ≤11.25kg-lowering furnace structural load; no special tools needed for cutting, installation efficiency 2x higher than brick linings.

3. Technical Parameters

4. Application Scenarios

Vacuum Heat Treatment Furnaces: Lining and door baffles-maintains vacuum cleanliness, high insulation reduces heating time for metal parts (e.g., aerospace alloy components), cutting energy consumption by 25%.

Muffle Furnaces: Inner insulation layers-1260℃ temp resistance withstands sintering temps, precision size fits muffle cavity, avoiding heat leakage.

Precision Ceramic Kilns: Kiln car insulation panels and roof linings-lightweight design eases kiln car movement, low thermal conductivity ensures uniform temperature distribution for ceramic sintering.

Electronics & Semiconductor Equipment: High-temp test chamber linings-low organic content prevents contamination of semiconductor wafers, rigidity supports chamber structural stability.

5. Service & Support

Customization Service: Supports size (thickness 5-100mm, length/width up to 2000mm), bulk density (220-500kg/m³) customization; surface treatment (e.g., waterproof coating) available for humid environments-3 days to confirm sample drawings, 7 days for sample delivery.

Pricing & Discounts: Tiered factory pricing: 1-5200kg ($1.90-$1.71/kg, 10% off), >5200kg (negotiable); $80 off for $1000+ orders, bulk orders (≥10,000kg) enjoy 8-12% additional discounts.

Samples & Quality Assurance: Free 100×100mm sample pieces provided (customer covers shipping); each batch undergoes testing (thermal conductivity, shrinkage, organic content) with ISO test reports; 1-year quality warranty (free replacement for defects like uneven density or low strength).

Delivery & Packaging: 1-5200kg shipped within 7 days, bulk orders (>5200kg) negotiable; standard packaging: single board vacuum-sealed plastic + cartons (for small batches) / fumigated pallets (for bulk); shipped via Qingdao/Tianjin ports (FOB/CIF terms available).

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