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Application of UHTC fibers

2021-12-07

 The micro-nano ceramic fiber aerogel material has excellent high temperature resistance, corrosion resistance and heat insulation properties, and is one of the main materials for thermal protection of aerospace vehicles. The currently used aerogel thermal insulation materials are mainly micro-nano ceramic fiber reinforced SiO2 nanoparticle aerogels. At the same time, in order to improve the structural stability of the material between nanoparticles and ceramic fibers, the researchers used an original three-dimensional fiber network reconstruction method to construct an ultra-lightweight, super-elastic ceramic nanofiber aerogel material. As a high-temperature insulation material, mullite fiber cotton also has a huge market prospect in the fields of aerospace and civil high-end materials.

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When a thermal runaway occurs in a new energy power battery, the temperature of the battery cell will rise rapidly, which can exceed 1000°C, causing the battery pack to catch fire. The SiO2 composite micro-nano ceramic fiber aerogel material is used in the module room and the shell of the battery module. As a heat insulation material, it can protect the battery cell through its own low thermal conductivity and good heat insulation characteristics.

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At present, continuous SiC micro-nano ceramic fiber toughened SiC ceramic composite materials can be used in the aviation field, mainly including engine combustion chamber lining, combustion chamber tube, nozzle guide vanes, wing leading edges, turbine blades and turbine shroud rings. In addition, there are also great expectations for the use of SiC micro-nano ceramic fibers in the field of nuclear power to replace high-temperature alloys. For example, because SiC ceramics have good radiation resistance and corrosion resistance, SiCf-SiC ceramic composites are expected to replace the original zirconium alloy materials for nuclear fuel cladding tubes to improve the safety of nuclear power plants.