Ceramic composite material of high temperature insulation sandwich structure and method for preparing ceramic composite material
A ceramic composite material and composite material technology, applied in the field of high-temperature-resistant and heat-insulating sandwich structure ceramic composite materials and its preparation, can solve the problems of thermal expansion and thermal stress of panels that are difficult to solve, and the difficulty of accurately controlling the surface accuracy of ultra-thin panels. Improve the heat insulation effect, improve the mechanical properties, and improve the installation method
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Embodiment 1
[0028] The high-temperature-resistant heat-insulating sandwich structure ceramic composite material of the present embodiment, the core layer is the silica airgel composite material layer that mullite short fiber strengthens, and the thickness of core layer is 20mm; The density of core layer material is 0.32g / cm 3 , the thermal conductivity is 0.028W / m×K; the upper and lower surfaces of the core layer are compounded with quartz fiber cloth reinforced silica ceramic composite surface plates, the thickness of the upper surface plate is 1mm, and the thickness of the lower surface plate is 0.5mm.
[0029] The preparation method includes the following steps: (1) selecting mullite short fiber reinforced silica airgel composite material as the core layer material, and the core layer material is prepared by supercritical drying method (refer to Chinese patent 200510031952.0, 200710034510.0, 201110110844.8, 201110110947.4, 201110110946.X, 201010300112.0 or 201010148105.3 by the disclo...
Embodiment 2
[0034] The high-temperature-resistant and heat-insulating sandwich-structure ceramic composite material of this embodiment has a core layer of alumina airgel composite material layer reinforced by alumina short fibers, and the thickness of the core layer is 25mm; the density of the core layer material is 0.35g / cm 3 , the thermal conductivity is 0.032W / m×K; the upper and lower surfaces of the core layer are compounded with silicon carbide fiber cloth reinforced alumina ceramic composite surface plates, and the thickness of the upper and lower surface plates is 0.9mm respectively.
[0035]The preparation method includes the following steps: (1) selecting alumina short fiber reinforced alumina airgel composite material as the core layer material, and the core layer material is prepared by supercritical drying method (refer to Chinese patents 200510031952.0, 200710034510.0, 201110110844.8, 201110110947.4, 201110110946.X, 201010300112.0 or 201010148105.3 published methods), the thic...
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