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A composite thermal insulator based on xonotlite and perlite

Journal of University of Science and Technology Beijing 2002年第6期9卷 401-405页

作者： WenNi ZiChunYang 等 CivilandEnvironmentalEngineering SchoolUniversityofScienceandTechnologyBeijingBeijing100083China NavalEngineeringUniversity Wuhan430033

A low cost thermal insulating material can be produced by compounding anactive xonotlite slurry, fired-perlite, HOMO PAN fibers and glass fibers. The maximum servicetemperature of the product is 800 deg C; linear shrinkage after 800 deg C X 16 h firing is 0.9percent; the cold crushing strength is 1.56 MPa; the flexural strength at ambient temperature is0.81 MPa; the thermal conductivity at ambient temperature (25 deg C) is 0.056 and 0.128 W/(m centredot K) at 800 deg C. The production cost of such a composite is only 1/3 of that of the normalxonotlite thermal insulators. It can substitute the normal xonotlite thermal insulators on mostoccasions with a similar cost to that of normal perlite products.

关键词： perlite xonotlite thermal insulator

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Effect of electrodes and thermal insulators on grain refinement by electric current pulse

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Transactions of Nonferrous Metals Society of China 2013年第1期23卷 92-97页

作者：尹振兴梁冬陈玉娥程誉锋翟启杰上海大学上海市现代冶金与材料制备实验室上海200072

The application of electric current pulse（ECP） to a solidification process refers to the immersion of electrodes into the liquid metal and the employment of thermal insulators on the upper surface of *** order to ascertain the effects of these two factors on the structure refinement by the ECP technique,three groups of experiments were performed with different types of electrodes or various thermal *** the comparison between solidification structures under different conditions,it is followed that the electrode and the thermal insulator have an obvious influence on the grain refinement under an applied ECP,and further analysis demonstrates that the thermal conditions of the liquid surface play a vital role in the modification of solidification ***,the results support the viewpoint that most of the equiaxed grains originate from the liquid surface subjected to an ECP.

关键词： solidification structure grain refinement electric current pulse electrode thermal insulator

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Fabrication and Characterization of Bamboo—Epoxy Reinforced Composite for thermal Insulation

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Open Journal of Composite Materials 2024年第1期14卷 15-32页

作者： Nandavardhan Reddy Kopparthi Jens Schuster Yousuf Pasha Shaik Institute of Polymer Technology West Palatine University of Applied Sciences Kaiserslautern Pirmasens Germany

As global warming intensifies, researchers worldwide strive to develop effective ways to reduce heat transfer. Among the natural fiber composites studied extensively in recent decades, bamboo has emerged as a prime candidate for reinforcement. This woody plant offers inherent strengths, biodegradability, and abundant availability. Due to its high cellulose content, its low thermal conductivity establishes bamboo as a thermally resistant material. Its low thermal conductivity, enhanced by a NaOH solution treatment, makes it an excellent thermally resistant material. Researchers incorporated Hollow Glass Microspheres (HGM) and Kaolin fillers into the epoxy matrix to improve the insulating properties of bamboo composites. These fillers substantially enhance thermal resistance, limiting heat transfer. Various compositions, like (30% HGM + 25% Bamboo + 65% Epoxy) and (30% Kaolin + 25% Bamboo + 45% Epoxy), were compared to identify the most efficient thermal insulator. Using Vacuum Assisted Resin Transfer Molding (VARTM) ensures uniform distribution of fillers and resin, creating a structurally sound thermal barrier. These reinforced composites, evaluated using the TOPSIS method, demonstrated their potential as high-performance materials combating heat transfer, offering a promising solution in the battle against climate change.

关键词： thermal insulator Rooftiles Hollow Glass Microspheres Bamboo Kaolin Epoxy VARTM Process thermal Conductivity Mechanical Properties

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