Overview
METHERM Microporous M 1000 Max is a rigid, high-performance thermal insulation board based on a fumed silica (SiO₂) microporous core matrix, formulated for applications where enhanced mechanical strength is required alongside the ultra-low thermal conductivity characteristic of microporous insulation. The "Max" designation indicates a higher reinforcing fibre fraction compared to the standard M 1000 grade, resulting in improved flexural strength (0.13 MPa versus 0.12 MPa) and better resistance to cracking under vibration, mechanical load during installation, or thermal shock.
Like all grades in the METHERM microporous range, M 1000 Max derives its exceptional thermal performance from the Knudsen effect: pore sizes in the fumed silica matrix fall below the mean free path of air molecules at atmospheric pressure, suppressing gas-phase conductive and convective heat transfer. Opacifiers — silicon carbide (SiC) or titanium dioxide (TiO₂) — attenuate infrared radiation at elevated temperatures. The combined effect is a thermal conductivity of 0.021 W/(m·K) at 20°C and 0.040 W/(m·K) at 800°C. These figures are slightly higher than the standard M 1000 grade (0.020 and 0.033 W/(m·K) respectively) due to the higher fibre loading, but remain dramatically lower than any conventional insulation material across the same temperature range.
The trade-off in M 1000 Max — marginally higher thermal conductivity in exchange for better mechanical robustness — is well-suited to applications where panel cracking during installation or in-service is a practical concern. Kiln car decks subject to foot traffic or fork-lift loading during kiln loading operations, furnace structures exposed to vibration from fans or burner assemblies, and any installation requiring multiple panel handling steps before final positioning are typical M 1000 Max use cases. Where purely minimum thermal conductivity is the criterion and the installation is not mechanically demanding, M 1000 remains the preferred specification.
M 1000 Max is non-combustible (Class A1), asbestos-free, CFC-free, and machinable with standard tools on site. Maximum continuous service temperature is 1000°C.
Technical Specifications
| Property | Unit | Value |
|---|---|---|
| Maximum service temperature | °C | 1000 |
| Thermal conductivity at 20°C | W/(m·K) | 0.021 |
| Thermal conductivity at 200°C | W/(m·K) | 0.024 |
| Thermal conductivity at 400°C | W/(m·K) | 0.028 |
| Thermal conductivity at 800°C | W/(m·K) | 0.040 |
| Flexural strength | MPa | 0.13 |
| Compressive strength | MPa | 0.3 |
| Fire classification | — | Class A1 (non-combustible) |
| Asbestos content | — | None |
| CFC / HCFC content | — | None |
| Machinable / sawable | — | Yes — standard tools |
| Density | — | Contact for data sheet |
Note on density: Density values are available on the product data sheet. Contact East Materials to request the current data sheet for certified density, thermal conductivity test reports, and mechanical test results.
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When to Choose M 1000 Max vs M 1000
The M 1000 Max grade is the right choice when one or more of the following apply:
- Vibration exposure: The insulation is fitted in a position exposed to mechanical vibration from fans, burner motors, conveyor drives, or adjacent heavy machinery. The higher flexural strength reduces the probability of crack propagation under sustained vibration.
- Mechanical loading during installation: Multi-panel systems requiring fitting, trimming, or repositioning of boards introduce bending loads that can crack standard-grade panels. M 1000 Max better tolerates handling stress.
- Kiln car deck applications: Where boards serve as structural deck insulation on kiln cars subject to loading by personnel or mechanical handling equipment, the enhanced flexural strength reduces breakage rates and maintenance frequency.
- Thermal shock risk: Applications with rapid heat-up and cool-down cycles involving large temperature differentials, where differential thermal expansion stresses may exceed the fracture toughness of standard-grade panels.
When purely minimising thermal conductivity is the priority and the installation is mechanically benign, specify M 1000 (λ = 0.020 W/(m·K) at 20°C versus 0.021 for M 1000 Max). When the application requires service temperatures above 1000°C, specify M 1100.
Applications
Kiln Car Deck Insulation
Kiln car decks in tunnel kilns and shuttle kilns for ceramic, refractory, and technical ceramics production are one of the primary applications for M 1000 Max. The deck insulation must support ware weight during loading and withstand repeated thermal cycling between ambient and peak firing temperature (typically 900–1000°C). M 1000 Max panels installed in kiln car decks reduce the thermal mass of the car, improving kiln energy efficiency and reducing cycle time. The enhanced flexural strength reduces panel breakage during loading operations and extends replacement intervals.
Industrial Furnaces with Vibration Exposure
Steel reheating furnaces, aluminium melting furnaces, and glass melting furnaces all generate vibration from combustion equipment, fans, and associated mechanical systems. Backup insulation panels fitted in vibration-exposed positions — particularly furnace side walls adjacent to burner ports, or roof panels over blower systems — benefit from the higher strength of M 1000 Max relative to M 1000. Panel breakage in vibration-exposed positions is a common maintenance issue with standard-grade microporous board; M 1000 Max reduces this failure mode.
Boiler and Process Plant Retrofit
In boiler shell backup insulation retrofit programmes, where panels must be fitted, cut to size, and positioned by multiple handling steps before final adhesion, M 1000 Max's improved handling strength reduces waste from board damage during installation. The slight increase in thermal conductivity over M 1000 is generally acceptable given the overall reduction in material waste.
Furnace Door and Frame Insulation
Furnace door panels and door frame insulation components are subject to repeated opening and closing, vibration from door mechanisms, and occasional mechanical impact. M 1000 Max is specified in preference to M 1000 for these positions in demanding production environments.
Steel and Aluminium Industries
Soaking pit cover insulation, ladle preheater backup, and aluminium holding furnace backup insulation where mechanical robustness is important alongside thermal performance. The maximum service temperature of 1000°C covers all standard aluminium processing and most steel soaking applications.
Packaging & Storage
METHERM Microporous M 1000 Max panels are supplied as rigid flat boards. Standard board format is typically 1000 × 500 mm; standard thickness range is 15–50 mm. Custom thickness and cut-to-size are available for container-quantity orders. Boards are carton-packaged and palletised for ocean freight (FCL and LCL, FOB Shanghai).
Handle with gloves — the fumed silica matrix produces fine respirable silica dust when boards are cut, broken, or abraded. On-site cutting should use standard masonry saw or woodworking tools with dust extraction or local exhaust ventilation. Boards are fragile under point impact despite their improved flexural strength; store flat on a level pallet and avoid stacking heavy loads directly on panels.
Store dry, away from water and rain. No special temperature or humidity requirements beyond keeping boards dry. Shelf life is indefinite in dry storage.
Related Products
- Microporous Insulation — parent hub with full range overview and grade comparison table
- METHERM Microporous M 1000 — standard grade, lower λ (0.020 W/(m·K) at 20°C), same 1000°C ceiling
- METHERM Microporous M 1100 — extended temperature grade, max 1100°C
- METHERM® Calcium Silicate Insulation — rigid boards with higher compressive strength for load-bearing applications
- MEGEL® Aerogel Insulation — aerogel felt for flexible, irregular-geometry applications
- thermaleast.com — high-temperature refractory and furnace insulation systems (SEMITECH sister site)
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