Microporous fumed-silica insulation board as a candidate Standard Reference Material of thermal resistance

Smith, David R.; Hust, J. G.

doi:10.6028/nist.ir.88-3901

Cited by 7 publications

(17 citation statements)

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“…Table 1 showed the thermal conductivity of compact specimens with 80% porosity at 100 and 400 26) . They were lower than molecular conductivity of still air (0.03 W/mK at 100 , 0.05 W/mK at 400 ) and at the same level as those obtained from silica aerogel 38) and fumed silica compacts 39) . These results indicated that the obtained compacts had nano-scale porous str ucture.…”

Section: Nano-porous Structural Control and Its Application For Thermmentioning

confidence: 98%

Smart Powder Processing for Advanced Materials

Naito

Abe

Kondô

et al. 2009

KONA

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Section: Nano-porous Structural Control and Its Application For Thermmentioning

confidence: 98%

Smart Powder Processing for Advanced Materials

Naito

Abe

Kondô

et al. 2009

KONA

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“…The material contains no organic compounds and is non-reactive at temperatures up to 1173 K [8], so that the computed thermal conductivity results can be compared directly to the previously measured values [8,9]. However, an additional complication arises in this case.…”

Section: Fumed-silica Insulation Boardmentioning

confidence: 99%

“…Computed effective thermal conductivity results for fumed-silica insulation board in comparison to previously measured NIST data (with error bars indicating AE 5%) [8,9]. Note: NIST data have been corrected to values for one standard atmosphere of pressure (sea level) using the procedure provided in Reference [9].…”

Section: Fumed-silica Insulation Boardmentioning

confidence: 99%

“…The board is available as NIST Standard Reference Material 1449 (http://ts.nist.gov/) and its room temperature [8] and high temperature [9] thermal conductivities have both been previously measured by NIST. Specimens [8] were obtained in panels having nominal dimensions of 600 mm Â 600 mm Â 25 mm with a nominal bulk density of about 310 kg/m 3 .…”

Section: Frm and Insulation Materialsmentioning

confidence: 99%

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A slug calorimeter for evaluating the thermal performance of fire resistive materials

Bentz

Flynn²,

Kim

et al. 2005

Fire and Materials

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SUMMARYThe utilization of a slug calorimeter to evaluate the thermal performance of fire resistive materials (FRMs) is presented. The basic specimen configuration consists of a 'sandwich', with a square central stainless-steel plate (slug) surrounded on two sides by the FRM. This sandwich configuration provides an adiabatic boundary condition at the central axis of the slug plate that greatly simplifies the analysis. The other four (thin) sides of the steel plate (and FRM specimens) are insulated using a low thermal conductivity fumedsilica board. Two metal plates manufactured from a high temperature alloy provide a frame for placing the entire sandwich specimen slightly in compression. The entire configuration is centrally placed at the bottom of an electrically heated box furnace and the temperatures of the metal slug and exterior FRM surfaces are monitored during multiple heating and cooling cycles. Knowing the heat capacities and densities of the steel slug and the FRM, an effective thermal conductivity for the FRM can be estimated. The effective thermal conductivity of the FRM will be influenced by its true thermal conductivity and by any endothermic or exothermic reactions or phase changes occurring within the FRM. Preliminary tests have been conducted on two commonly used FRMs and on a non-reactive fumed-silica board to demonstrate the feasibility of the method. Published in 2005 by John Wiley & Sons, Ltd.

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“…I ntense interest has focused on thermal insulation materials in a global scale, because elevating energy costs have emphasized the importance of efficient thermal insulation. A fumed silica compact has been developed as a high performance thermal insulation board 1,2 . The thermal conductivity of the fumed silica compact is almost the same as supercritically dried silica aerogels 3,4 .…”

Section: Introductionmentioning

confidence: 99%

Dry Powder Processing of Fibrous Fumed Silica Compacts for Thermal Insulation

Abe

Sato

et al. 2005

Journal of the American Ceramic Society

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This study proposes a new dry powder processing method to produce fiber reinforced fumed silica compacts for highly efficient thermal insulation. First, mechanical forces such as shear stress and compression were applied into a fumed silica powder (BET SSA 300 m2/g) and glass fibers (3 mm length, 11 μm diameter) using an attrition type milling apparatus without any media balls. In the resultant powder mixture, fumed silica porously coated glass fiber composites were successfully prepared. SiC particles were also integrated as opacifiers. Then, the fibrous fumed silica porous compact was formed by dry pressing of the powder mixture and exhibited fracture strength of 1.58 MPa at room temperature and thermal conductivity of 0.0282 W/mK at 400°C, when its porosity was 80.1%.

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Microporous fumed-silica insulation board as a candidate Standard Reference Material of thermal resistance

Cited by 7 publications

References 0 publications

Smart Powder Processing for Advanced Materials

Smart Powder Processing for Advanced Materials

A slug calorimeter for evaluating the thermal performance of fire resistive materials

Dry Powder Processing of Fibrous Fumed Silica Compacts for Thermal Insulation

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