Preparation method of high-temperature thermal insulation tile containing mullite fiber

A mullite fiber and heat-insulating tile technology, which is applied in the preparation of mullite fiber high-temperature heat-insulating tiles, and in the field of polymer gel molding to prepare mullite fiber high-temperature heat-insulating tiles, can solve the problem of binder dispersion. In place and other issues to achieve the effect of optimizing performance and improving mechanical properties

Active Publication Date: 2018-01-09
TIANJIN UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0005] The purpose of the present invention is to develop a method to solve the technical problem of insufficient binder dispersion in the preparation process of the existing mullite fiber heat-insulating tiles, and to provide a preparation method for mullite fiber high-temperature heat-insulation tiles. Chopped mullite fiber is used as raw material, condensation type dimethyl silicone rubber is used as adhesive, dimethyl silicone oil is used as diluent, ammonium persulfate (APS) is used as initiator, and in-situ curing and suction filtration molding process are adopted to prepare Three-dimensional mullite fiber high temperature insulation material with excellent spatial structure

Method used

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  • Preparation method of high-temperature thermal insulation tile containing mullite fiber
  • Preparation method of high-temperature thermal insulation tile containing mullite fiber
  • Preparation method of high-temperature thermal insulation tile containing mullite fiber

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preparation example Construction

[0030] A method for preparing mullite fiber high-temperature heat-insulating tiles, comprising the following steps:

[0031] (1) Shorten mullite long fibers using fiber crushing equipment, the shearing time is 4min to 6min, to obtain chopped mullite fibers with a length of 400 μm to 600 μm;

[0032] (2) Use condensation-type dimethyl silicone rubber as an adhesive, use dimethyl silicone oil as a diluent, and mix according to the mass ratio of condensation-type dimethyl silicone rubber: dimethyl silicone oil = 100: (45-75) Evenly, stir in a water bath at 40°C to 60°C for 1h to 2h to obtain a premixed colloid;

[0033] (3) According to the mass ratio of mullite chopped fiber and premixed colloid (20~40): 100, take the mullite chopped fiber prepared in step (1), and take the premixed colloid obtained in step (2). For colloidal mixing, add mullite chopped fibers to the premixed colloid during stirring in a water bath at 40°C to 60°C, and stir vigorously for 2h to 4h until the fib...

Embodiment 1

[0039] In this embodiment, a method for preparing a mullite fiber high-temperature heat-insulating tile is specifically carried out according to the following steps:

[0040] (1) Shorten mullite long fibers using fiber crushing equipment, and the shearing time is 6 minutes to obtain chopped mullite fibers with a length of 400 μm;

[0041] (2) Use condensation-type dimethyl silicone rubber as an adhesive, use dimethyl silicone oil as a diluent, mix evenly according to the mass ratio of condensation-type dimethyl silicone rubber: dimethyl silicone oil = 100:75, and mix at 40 ℃ water bath and stirred for 2 hours to obtain the premixed colloid;

[0042] (3) according to the mass ratio of mullite chopped fiber and premixed colloid is 40:100, get the mullite chopped fiber prepared in step (1), get the premixed colloid obtained in step (2), in During stirring in a water bath at 40°C, add mullite chopped fibers to the premixed colloid, and stir vigorously for 4 hours until the fibers...

Embodiment 2

[0049] In this embodiment, a method for preparing a mullite fiber high-temperature heat-insulating tile is specifically carried out according to the following steps:

[0050] (1) Shorten mullite long fibers using fiber crushing equipment, and the shearing time is 5 minutes to obtain chopped mullite fibers with a length of 500 μm;

[0051] (2) Use condensation-type dimethyl silicone rubber as an adhesive, use dimethyl silicone oil as a diluent, mix evenly according to the mass ratio of condensation-type dimethyl silicone rubber: dimethyl silicone oil = 100:60, and mix at 50 ℃ water bath and stirred for 2 hours to obtain the premixed colloid;

[0052] (3) according to the mass ratio of mullite chopped fiber and premixed colloid is 30:100, get the mullite chopped fiber prepared in step (1), get the premixed colloid obtained in step (2), in During stirring in a water bath at 50°C, add mullite chopped fibers to the premixed colloid, and stir vigorously for 3 hours until the fibers...

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Abstract

The invention relates to a preparation method of a thermal insulation tile containing ceramic fiber. The ceramic fiber is sheared with fiber crushing equipment and chopped fiber is obtained; condensedtype dimethyl silicone rubber and dimethicone are mixed and premix rubber is obtained; mullite fiber is added and fiber slurry is obtained; an initiator is added to the slurry, the slurry is poured into suction filtration equipment for suction filtration treatment; a wet body is subjected to primary drying-demolding-secondary drying treatment and a dried body is obtained; the body is placed in ahigh-temperature furnace for rubber removal and sintering, and the thermal insulation tile containing the ceramic fiber is obtained. The thermal insulation tile has the density of 0.29 g / cm<3>-0.53 g / cm<3>, compressive strength of 0.7 MPa-1.9 MPa and temperature resistance up to 1,500 DEG C, and a binder can better coat the fiber. The problem that the binder is not dispersed in place during preparation of the thermal insulation tile containing the mullite fiber is solved. The thermal insulation tile containing the mullite fiber can bear the high temperature of 1,500 DEG C and can be applied tohypersonic speed spacecrafts.

Description

technical field [0001] The invention belongs to the field of ceramic-based composite materials, and specifically designs a method for preparing mullite fiber high-temperature heat-insulating tiles, in particular to a method for preparing mullite fiber high-temperature heat-insulating tiles by polymer gel molding. Background technique [0002] In recent years, high Mach number, high precision, long endurance and gradually become the development direction of new missiles and reusable aerospace vehicles. In the future military development, new missiles and reusable aerospace vehicles will surely become the key to enhance the national military competitiveness. focus of development. Compared with existing missiles and aircraft, new missiles and reusable aerospace vehicles maintain a high Mach number and fly for a long time, and inevitably need to face increasingly serious aerodynamic heating phenomena and withstand higher and higher ambient temperatures. This puts forward higher...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B35/82C04B35/634
Inventor 郭安然陈恒刘瑞明刘家臣谢霜天刘瑞丽
Owner TIANJIN UNIV
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