Rigid Carbon Felt Insulation

Name: Rigid Carbon Felt Insulation
Brand: SiC Graphite
SKU: rigid-carbon-felt-insulation
Availability: InStock
Rating: 4.9 (24 reviews)

Rigid graphite felt insulation for high-temperature vacuum furnaces and inert-atmosphere hot zones. Designed for low thermal conductivity, shape stability, and controlled outgassing.

Target Buyer:Thermal engineers and furnace maintenance teams.

Rigid carbon felt insulation for high-temperature vacuum furnace 1

Capability Highlights

Low thermal conductivity
High shape stability
Low ash and outgassing

Typical Applications

Vacuum Furnaces
SiC PVT Furnaces
Inert Gas Furnaces

Engineering Focus

Thickness tolerance
Coating options (e.g., graphite foil face)
Ash content

Key Evaluation Matrix

Metric	Typical Range	Why It Matters
Thermal Conductivity	0.1 - 0.2 W/m·K at 1000°C	Determines energy efficiency and max temp.
Thickness and Density	Specified by hot-zone heat-loss target	Under-specified insulation increases power draw and reduces temperature stability.
Surface Treatment	Bare felt, foil-faced, or coated surface	Surface treatment reduces dusting and protects fragile insulation edges.
Fit Geometry	Cylinder, ring, plate, or segmented assembly	Gaps between insulation pieces become repeatable heat-loss paths.

Engineering Datasheet

Product-Level Technical Specifications

Values below are RFQ planning targets, not blanket guarantees. Final acceptance criteria should be frozen against drawings, process conditions, equipment model, and buyer qualification requirements.

Parameter	Target / Typical Scope	Engineering Note
Insulation form	Cylinder, ring, plate, segment, panel, or machined custom shape	Form factor should follow chamber access, seam position, and handling risk.
Density and thickness	Buyer-defined density class and thickness by heat-loss target	Thickness, density, and surface treatment must be reviewed together for energy use and mechanical stability.
Thermal conductivity	Typical low-conductivity carbon / graphite felt range by temperature	Quoted conductivity should be tied to test temperature and felt grade, not used as a universal constant.
Surface treatment	Bare rigid felt, graphite foil-faced, coated, or C/C protected surfaces	Surface treatment reduces dusting, erosion, and edge damage in maintenance cycles.
Machining tolerance	OD, ID, height, thickness, seam, and segmented fit by drawing	Insulation gaps become repeatable heat-loss paths and can change hot-zone uniformity.
Maximum service environment	Vacuum or inert furnace review by temperature, ramp cycle, and purity requirement	Air leaks, oxygen exposure, or aggressive cleaning can shorten insulation life quickly.

Trace Impurity Review Table

Semiconductor programs should define restricted elements before sample production. The table helps procurement and process teams turn purity expectations into a measurable qualification file.

Element	Typical Limit	Why Controlled
Ash content	Standard, purified, or semiconductor-grade target by project	Low-ash felt is required when insulation sits near crystal-growth or clean thermal-field zones.
Fiber dusting	Surface-sealed or foil-faced route where dust is not acceptable	Felt dust can contaminate heaters, shields, crucibles, and wafer-facing hot-zone hardware.
Volatile release	Bakeout or outgassing expectation defined by vacuum process	Vacuum furnaces need predictable pump-down and stable background cleanliness.
Handling contamination	Clean bagging and separator method defined before shipment	Soft and rigid insulation can carry dust or loose fibers if packing is treated only as logistics.

RFQ Evidence Package

These records reduce ambiguity before sample approval and repeat-order release.

Insulation drawing with OD, ID, height, thickness, segmentation, seam, and foil/coating orientation.
Material route stating density class, ash target, surface treatment, and maximum service environment.
Dimensional or fit record for cylinders, rings, panels, and segmented insulation assemblies.
Packing photos showing separators, compression protection, dust control, and label orientation.
Installation notes for seam staggering, fragile edges, and surface-facing direction where relevant.

Equipment Compatibility Review

Compatibility should be treated as an engineering review, not a catalog claim. Equipment-family language helps buyers route the RFQ, while final production still depends on drawings, samples, coating allowance, and acceptance criteria.

Equipment Family	Compatible Part Scope	Buyer Validation Required
Vacuum furnace hot zones	Rigid felt cylinders, rings, panels, segmented insulation packs, and foil-faced insulation.	Confirm chamber ID, hot-zone OD, thickness, segmentation, door access, support penetrations, and foil orientation.
SiC PVT furnaces	Rigid carbon felt insulation, graphite felt shields, and thermal-field insulation stacks.	Confirm growth temperature, purity target, ring interfaces, seam positions, and source-zone exposure.
Sintering and inert-atmosphere furnaces	Insulation boards, cylinders, soft/rigid felt combinations, and replacement insulation segments.	Confirm ramp rate, atmosphere, maintenance access, expected cycle count, and dust tolerance.

Open full OEM compatibility matrix

Product Selection Logic

Decision Factor	Selection Logic	Buyer Check
Heat-loss target	Select felt thickness and geometry from energy efficiency and thermal-uniformity goals.	Provide hot-zone diameter, height, target temperature, and power limitation.
Particle control	Use surface foil or coating when dusting can contaminate the furnace or adjacent graphite parts.	Define clean handling, exposed edges, and expected maintenance access.
Segmentation	Large insulation rings often need segments for installation, shipping, and serviceability.	Send chamber access constraints and preferred installation sequence.

Manufacturing and QC Flow

Stage	Production / QC Checkpoint	Buyer Evidence
1. Heat-loss review	Confirm hot-zone dimensions, maximum temperature, target insulation thickness, and gaps.	Chamber layout, insulation drawing, and energy or uniformity target.
2. Felt configuration	Select rigid felt geometry, density, segmentation, and surface treatment.	Configuration drawing with bare, foil-faced, or coated surfaces noted.
3. Machining and edge control	Cut cylinders, rings, or panels while protecting fragile edges and fibers.	Dimensional and visual inspection record.
4. Dusting review	Check exposed edges, surface shedding, and interface with nearby graphite parts.	Surface-treatment confirmation or maintenance note.
5. Low-compression packing	Pack insulation to avoid crushing, moisture exposure, and edge breakage.	Packing method and carton or crate photos.

RFQ Checklist

Dimensions (OD, ID, Height, Thickness)
Required foil/coating on surfaces
Maximum operating temperature

Risk Controls

Felt dusting: Surface coating with graphite foil or CFC to seal fibers.

Product Gallery

Rigid carbon felt insulation for high-temperature vacuum furnace 2

Rigid carbon felt insulation for high-temperature vacuum furnace 3

Rigid carbon felt insulation for high-temperature vacuum furnace 4

Rigid carbon felt insulation for high-temperature vacuum furnace 5

Machined rigid carbon felt insulation cylinder 1

Machined rigid carbon felt insulation cylinder 2

Machined rigid carbon felt insulation cylinder 3

Buyer FAQ

Can you provide pre-machined cylinders?

Yes, we supply custom-machined rigid cylinders, plates, and complex shapes.

How should rigid carbon felt thickness be selected?

Thickness should follow hot-zone diameter, target temperature, heat-loss target, and installation constraints rather than a generic insulation rule.

How can dusting risk be reduced?

Use foil-faced or coated surfaces where process cleanliness matters, and define exposed edges and maintenance handling before production.

Can rigid felt be supplied as segmented insulation?

Yes. Segmentation is often used for large furnaces, limited chamber access, and safer export packing.

Related Resources

Procurement Next Steps

Compare the full product portfolio before locking material architecture.
Match the part to a process solution for thermal-field and contamination constraints.
Review OEM capability controls for machining, coating, purification, and export packaging.
Send a drawing-based RFQ with process, material grade, tolerances, quantity, and delivery target.

Inquiry Email

[email protected]

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Include process, product type, drawing status, purity/coating target, dimensions, quantity forecast, operating conditions, and delivery date.

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+8618857971991

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