Mat/Support Material: Component Specs, Materials & Applications

Component Specifications

Definition

A specialized structural material used to support and stabilize the catalyst substrate within a Diesel Oxidation Catalyst (DOC) system. It provides mechanical integrity, thermal stability, and proper gas flow distribution while withstanding harsh exhaust conditions including high temperatures, thermal cycling, and chemical exposure.

Working Principle

Provides physical support and thermal management for the catalyst substrate, ensuring uniform exhaust gas distribution across the catalytic surface while maintaining structural integrity under thermal expansion and vibration. The material's porosity and thermal conductivity help manage heat distribution and prevent localized overheating.

Materials

Typically cordierite (2MgO·2Al₂O₃·5SiO₂) ceramic or metallic alloys (stainless steel, FeCrAl). Ceramic versions offer excellent thermal shock resistance, while metallic versions provide higher mechanical strength and thermal conductivity.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Porosity	30-40% (ceramic), controlled cell structure (metallic)
Cell Density	200-600 cells per square inch (cpsi)
Temperature Range	Up to 1000°C continuous, 1200°C peak
Compressive Strength	>10 MPa (ceramic), >20 MPa (metallic)
Thermal Conductivity	1-2 W/m·K (ceramic), 15-25 W/m·K (metallic)
Thermal Expansion Coefficient	0.5-1.5 × 10⁻⁶/K (ceramic), 10-15 × 10⁻⁶/K (metallic)

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 13317, ISO 18754, DIN EN 623-2, DIN 51045

Parent Products

This component is used in the following industrial products

Diesel Oxidation Catalyst (DOC)

An exhaust aftertreatment device that oxidizes carbon monoxide (CO) and hydrocarbons (HC) in diesel exhaust gases to reduce emissions.

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Engineering Analysis

Risks & Mitigation

Thermal cracking under rapid temperature changes
Chemical degradation from exhaust contaminants
Mechanical failure due to vibration and thermal cycling
Flow maldistribution leading to uneven catalyst utilization

FMEA Triads

Trigger: Thermal stress from rapid temperature cycling
Failure: Cracking or structural failure of support material
Mitigation: Use materials with low thermal expansion coefficients, implement gradual warm-up protocols, and design for thermal stress relief

Trigger: Chemical attack from sulfur compounds or other exhaust contaminants
Failure: Material degradation and loss of structural integrity
Mitigation: Select chemically resistant materials, implement protective coatings, and maintain proper exhaust temperature control

Trigger: Mechanical vibration and shock
Failure: Fracture or displacement of support structure
Mitigation: Optimize mounting systems, use vibration dampening materials, and ensure proper mechanical fastening

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Dimensional tolerance ±0.5mm, flatness tolerance 0.1mm per 100mm, thermal expansion tolerance ±5% of specification

Test Method

ISO 13317 for thermal shock resistance, DIN EN 623-2 for mechanical properties, ISO 18754 for thermal expansion measurement

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Mat/Support Material

Manufacturer profiles associated with Mat/Support Material.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the primary function of DOC support material?

To provide mechanical support and thermal stability for the catalyst substrate, ensuring proper exhaust gas distribution and maintaining structural integrity under extreme operating conditions.

What are the main differences between ceramic and metallic support materials?

Ceramic materials (like cordierite) offer superior thermal shock resistance and lower thermal expansion, while metallic materials provide higher mechanical strength, better thermal conductivity, and faster light-off characteristics.

How does support material affect DOC performance?

Proper support material selection influences heat distribution, pressure drop, mechanical durability, and overall catalyst efficiency by maintaining substrate integrity and optimizing exhaust flow patterns.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Mat/Support Material