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Keyword: porosity

Total Papers Found: 35

Effect of cooking and drying on the thermal conductivity of rice

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Testing of thermal properties of foods is essential for operation and control of food processing plants. In this paper, the thermal conductivity of rice and the drying of cooked rice ...

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Temperature influence on the effective thermal conductivity of cellular metals measured in stagnant air

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This study aimed to experimentally measure the thermophysical properties of cellular metals, focusing on effective thermal conductivity. The transient plane source (TPS) technique was used to measure the thermal conductivity ...

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Effective thermal conductivity of metallic foams determined with the transient plane source technique

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Metal foams are materials composed of a solid grid with air-filled pores, and have applications in combustion chambers of gas turbines. In this study, the thermal properties of porous metal ...

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Influence of Sliding Speed on the Tribological Characteristics of Si3N4-hBN Ceramic Materials

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A disc of a composite ceramic material composed of silicon nitride (Si3N4) and 20% hBN was prepared and its tribological characteristics were investigated by sliding a Si3N4 pin across ...

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Influence of the volume fraction and the nature of fine lightweight aggregates on the thermal and mechanical properties of structural concrete

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The thermal and mechanical properties of concrete in which normal weight aggregate has been substituted with lightweight aggregates were investigated. The properties were found to be dependent on the volume ...

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Influence of thermal process on microstructural and physical properties of ambient pressure dried hydrophobic silica aerogel monoliths

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Ambient pressure dried hydrophobic silica aerogel monoliths were prepared via simultaneous solvent exchange and surface modification in order to minimize volume shrinkage and density. At room temperature, the obtained silica ...

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Cleaner production of the lightweight insulating composites: Microstructure, pore network and thermal conductivity

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A porous matrix was prepared using low-density sawdust and a metakaolin-based geopolymer paste. The matrix was prepared in order to evaluate its performance as a thermally insulating building envelope. The ...

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Porous thermal insulation materials derived from fly ash using a foaming and slip casting method         

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Coal fly ash was used as the base material for the formation of thermal insulation materials. The porosity of the produced materials ranged from 86.3-94.5 vol. %. The insulating materials were ...

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Performance Assessment of Passive Fire Protection Materials

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Three reference passive fire protection materials were tested to determine the effect that fire exposure has on their thermophysical properties. It was determined that the thermophysical properties during fire exposure ...

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