A kind of radiation-resistant ceramic fiber thermal insulation composite material and its preparation method

A ceramic fiber and composite material technology, applied in textiles, papermaking, non-woven fabrics, etc., can solve the problems of high hydrophobicity, high thermal conductivity, high corrosion, etc., achieve good neutron radiation resistance and ensure technical performance , to ensure the full effect of

Active Publication Date: 2022-04-26
NO 59 RES INST OF CHINA ORDNANCE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that inorganic fiber insulation materials are applied to military and civilian equipment and facilities, the purpose of the present invention is to provide a kind of radiation-resistant ceramic fiber thermal insulation composite material, which can be applied to military and civilian equipment and facilities under high-dose nuclear radiation environment. It has the characteristics of ultra-low thermal conductivity, ultra-low moisture absorption, and ultra-high hydrophobicity, and will not corrode austenitic stainless steel, which can well solve the problems of high thermal conductivity and easy moisture absorption in existing inorganic fiber materials. , high corrosion and other issues, better guarantee the full play of the technical performance of military and civilian equipment and facilities

Method used

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  • A kind of radiation-resistant ceramic fiber thermal insulation composite material and its preparation method
  • A kind of radiation-resistant ceramic fiber thermal insulation composite material and its preparation method
  • A kind of radiation-resistant ceramic fiber thermal insulation composite material and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0039] According to the chemical composition shown in Table 2 below, the radiation-resistant ceramics were fired by the conventional process, and the ceramic fibers were drawn by a general-purpose crucible or pool kiln to form tows with an average diameter of 11 μm. The net and needle punching process form a thickness of 3mm and a bulk density of 108kg / m 3 Radiation-resistant ceramic fiber needle felt.

[0040] Ceramic chemical composition in table 2 embodiment 1

[0041] serial number Element content(%) 1 SiO 2

59.85 2 al 2 o 3

13.12 3 CaO 22.63 4 MgO 2.71 5 Li 2 o

0.023 6 B 2 o 3

0.042

[0042] Take Na 2 SiO 3 as the precursor, C 2 h 5 OH is the solvent, H 2 SO 4 As a catalyst, the C 2 h 5 OH / Na 2 SiO 3 =4 (molar ratio, the same below) Na 2 SiO 3 with C 2 h 5 OH mixed and stirred, adding H to the stirring mixture 2 O / Na 2 SiO 3 = 3.5 deionized water and H 2 SO 4 / Na 2 SiO 3 ...

Embodiment 2

[0047] According to the chemical composition shown in Table 4 below, the radiation-resistant ceramics were fired by the conventional process, and the ceramic fibers were drawn by a general-purpose crucible or pool kiln to form tows with an average diameter of 9 μm. The mesh and needle punching process form a thickness of 6mm and a bulk density of 102kg / m 3 Radiation-resistant ceramic fiber needle felt.

[0048] Ceramic chemical composition in table 4 embodiment 2

[0049] serial number Element content(%) 1 SiO 2

59.67 2 Al 2 o 3

12.71 3 CaO 22.46 4 MgO 2.37 5 Li 2 o

0.008 6 B 2 o 3

0.012

[0050] Take Na 2 SiO 3 as the precursor, C 2 h 5 OH is the solvent, H 2 SO 4 As a catalyst, the C 2 h 5 OH / Na 2 SiO 3 Na = 8 2 SiO 3 with C 2 h 5 OH mixed and stirred, adding H to the stirring mixture 2 O / Na 2 SiO 3 = 4 deionized water and H 2 SO 4 / Na 2 SiO 3 =3.0×10 -3 H 2 SO 4 , let st...

Embodiment 3

[0055] According to the chemical composition shown in Table 6 below, the radiation-resistant ceramics are fired by the conventional process, and the ceramic fibers are drawn by a general-purpose crucible or a pool kiln to form a tow with an average diameter of 13 μm. The thickness of the mesh and acupuncture process is 6mm, and the bulk density is 112kg / m 3 Radiation-resistant ceramic fiber needle felt.

[0056] Ceramic chemical composition in table 6 embodiment 3

[0057] serial number Element content(%) 1 SiO 2

60.26 2 al 2 o 3

13.17 3 CaO 22.52 4 MgO 2.76 5 Li 2 o

0.022 6 B 2 o 3

0.032

[0058] Take Na 2 SiO 3 as the precursor, C 2 h 5 OH is the solvent, H 2 SO 4 As a catalyst, the C 2 h 5 OH / Na 2 SiO 3 Na = 6 2 SiO 3 with C 2 h 5 OH mixed and stirred, adding H to the stirring mixture 2 O / Na 2 SiO 3 = 4 deionized water and H 2 SO 4 / Na 2 SiO 3 =2.5×10 -3 H 2 SO 4 , let s...

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Abstract

The invention provides a radiation-resistant ceramic fiber thermal insulation composite material. The radiation-resistant ceramic fiber is made of the following raw materials: SiO 2 : 55~65%, Al 2 o 3 : 10-15%, CaO: 20-25%, MgO: 0-5%, Li 2 O: 0~0.1%, B 2 o 3 : 0 to 0.05%, the rest are unavoidable impurities, and the stated percentages are mass percentages. The radiation-resistant ceramic fiber thermal insulation composite material of the present invention has the characteristics of ultra-low thermal conductivity, ultra-low moisture absorption rate, and ultra-high hydrophobicity rate, and will not corrode austenitic stainless steel, which can well solve the problem of existing inorganic fiber types. The materials have problems such as high thermal conductivity, easy moisture absorption, and high corrosion resistance, which better guarantee the full play of the technical performance of military and civilian equipment and facilities. The invention also provides a preparation method of the radiation-resistant ceramic fiber thermal insulation composite material, which is simple to operate, does not require large-scale industrial equipment, and is suitable for industrial production.

Description

technical field [0001] The invention relates to the field of thermal insulation materials, in particular to a radiation-resistant ceramic fiber thermal insulation composite material and a preparation method thereof. Background technique [0002] In order to reduce heat loss during the working process of ships, nuclear power plants and other military and civilian equipment and facilities, improve thermal efficiency, prevent staff from being scalded, ensure safe and reliable operation of electrical equipment, instruments, etc.; or prevent condensation of equipment and pipelines with low surface temperature, must Part of the high-temperature or low-temperature equipment and pipelines of the equipment and facilities are covered with heat-insulating materials. At present, non-metallic insulation materials used in military and civilian equipment and facilities at home and abroad mainly include inorganic fiber materials such as glass wool and rock wool. The literature [Duan Chen, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C13/00D04H1/4209D04H1/46C04B30/02C04B111/27
CPCC03C13/00D04H1/4209D04H1/46C04B30/02C04B2201/32C04B2111/27C04B2111/00862C04B14/4656C04B14/062
Inventor 李忠盛罗明波吴护林黄安畏孙彩云叶妙芬蒋龙
Owner NO 59 RES INST OF CHINA ORDNANCE IND
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