Casting-molded thermal-insulation nanocomposite with high-temperature resistance and preparation method of casting-molded thermal-insulation nanocomposite
A technology for nano-insulation and composite materials, which is applied in the field of casting and forming high-temperature-resistant nano-insulation composite materials and its preparation, can solve the problem that it is difficult to meet the higher requirements of performance insulation materials, and it is difficult to have high temperature resistance, low thermal conductivity and low cost at the same time. High strength and other problems, to achieve the effect of reducing solid state heat conduction, inhibiting gaseous heat conduction, and reducing radiant heat conduction
Inactive Publication Date: 2018-08-21
NAT UNIV OF DEFENSE TECH
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Problems solved by technology
[0011] In summary, the existing airgel-based thermal insulation materials are difficult to simultaneously have the comprehensive properties of high temperature resistance, low thermal conductivity, low cost, and high strength, and it is difficult to meet the requirements of low-cost, high-performance thermal insulation in the military and civilian fields. higher demand for materials
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Embodiment 1
[0051] The difference between the preparation process of Example 1 and Example 2-479 is that the mass fraction of each substance is different and the types of additives, opacifiers and chopped fibers are different. The details are listed in Table 1. The performance of the prepared nano-insulation composite material is as follows Table 1 shows.
[0052] It can be seen from Table 1 that the main factor affecting the compressive strength is the mass fraction of white cement. With the increase of the mass fraction of white cement, the compressive strength of the material also increases. When the white cement is 20%wt, different fiber types are compressed. The strength (10% deformation) reaches the maximum, which is 0.78-0.82MPa. The main factor affecting the thermal conductivity of the material is the mass fraction of fumed silicon oxide. As the mass fraction of fumed silicon oxide increases, the thermal conductivity of the material decreases. When the fumed silica is 30%wt, the ...
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The invention discloses a casting-molded thermal-insulation nanocomposite with high-temperature resistance and a preparation method of the casting-molded thermal-insulation nanocomposite. The casting-molded thermal-insulation nanocomposite with high-temperature resistance is prepared from inorganic ceramic fiber, fumed silica micropowder, white cement, a solvent, an opacifying agent and an additive, wherein the inorganic ceramic fiber and the white cement are uniformly dispersed in a mixed solution of the solvent and the additive, fiber slurry is obtained, the fumed silica micropowder is uniformly mixed with the opacifying agent, a mixture is then uniformly mixed with the fiber slurry, thermal-insulation composite cement is obtained and dried naturally, and the casting-molded thermal-insulation nanocomposite with high-temperature resistance is obtained. The material has low thermal conductivity and good thermal insulation performance, temperature resistance and mechanical property; thepreparation method has the advantages of being low in cost, pollution-free, simple in process and convenient to construct and facilitating batch production.
Description
technical field [0001] The invention relates to a high-temperature-resistant nano-insulation composite material containing fumed silica powder and a preparation method thereof, in particular to a kind of white cement as an adhesive, fumed silica powder as a matrix, and chopped inorganic ceramic fiber as a reinforcement , A cast-molded high-temperature-resistant nano-heat-insulation composite material added with opacifying agent powder and a preparation method thereof. Background technique [0002] Global fossil energy is increasingly tense, how to improve energy utilization and reduce greenhouse gas emissions is an urgent problem to be solved. In the fields of high energy consumption, such as building insulation, petrochemical and other fields, the use of high-efficiency, light-weight, low-cost, green and environmentally friendly thermal insulation materials is one of the solutions. [0003] SiO 2 Due to their unique nanoporous network structure, airgel and its composites ...
Claims
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Patent Timeline
Login to view more IPC IPC(8): C04B28/04C04B20/00C04B14/06
CPCC04B14/062C04B20/0048C04B28/04C04B2201/32C04B2201/50C04B22/002C04B24/02C04B2103/56
Inventor 姜勇刚罗燚冯坚冯军宗李良军
Owner NAT UNIV OF DEFENSE TECH
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