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CN-121393993-B - Composite material, preparation method thereof and zirconia-based slurry

CN121393993BCN 121393993 BCN121393993 BCN 121393993BCN-121393993-B

Abstract

The application discloses a composite material, a preparation method thereof and zirconia-based slurry, belonging to the technical field of heat insulation protection of conductive materials, wherein the composite material comprises a matrix; the ceramic layer is covered on at least part of the surface of the substrate, the ceramic layer comprises a pore-forming agent, the glass layer is covered on at least part of one side of the ceramic layer, which is away from the substrate, wherein the pore-forming agent is gasified when reaching a first temperature T 1 , the glass layer is converted into a glass body in a molten state when reaching a second temperature T 2 , and the glass layer is in a molten state T 2 ＞T 1 . The composite material can resist fragmentation, and can avoid direct impact of open fire on a matrix, thereby improving the high temperature resistance of the matrix and playing an insulating role.

Inventors

  • Liang Zizhuo
  • BAI HAIFEI
  • Li Shuaifan
  • ZHANG GUYU
  • Ren Qihang
  • HAN FENG
  • ZHANG JING

Assignees

  • 合肥阳光零碳技术有限公司

Dates

Publication Date
20260508
Application Date
20251224

Claims (13)

  1. 1. A composite material, the composite material comprising: a base body (10), wherein the base body (10) is made of metal; A ceramic layer (20), wherein the ceramic layer (20) is coated on at least part of the surface of the substrate (10), and the ceramic layer (20) comprises a pore-forming agent (201); a glass layer (30), wherein the glass layer (30) covers at least part of the side of the ceramic layer (20) facing away from the substrate (10); Wherein the pore former (201) is configured to vaporize upon reaching a first temperature T 1 , and the glass layer (30) is configured to at least partially transition to a molten glass body (301) upon reaching a second temperature T 2 , and T 2 ＞T 1 .
  2. 2. The composite material of claim 1, wherein the first temperature T 1 satisfies 350 ℃ to T 1 to 450 ℃.
  3. 3. The composite material of claim 1, wherein the second temperature T 2 satisfies 900 ℃ to T 2 to 1000 ℃.
  4. 4. The composite material according to claim 1, wherein the glass layer (30) has a linear thermal expansion coefficient ranging from 13X 10 -6 /K to 19X 10 -6 /K and/or, The ceramic layer (20) has a linear thermal expansion coefficient ranging from 10X 10 -6 /K to 12X 10 -6 /K, and/or, The linear thermal expansion coefficient of the substrate (10) is in the range of 10X 10 -6 /K to 18X 10 -6 /K.
  5. 5. The composite material according to claim 1, characterized in that the thermal conductivity of the ceramic layer (20) has a value ranging from 2.0W/m-K to 3.3W/m-K.
  6. 6. The composite material according to claim 1, wherein the ceramic layer (20) is made of a zirconia-based slurry comprising, in parts by mass: 50 to 70 parts of a zirconia-based material; 5 to 15 parts of pore-forming materials; 20to 30 parts of a first solvent; and 3 to 5 parts of a first binder.
  7. 7. The composite material of claim 6, wherein: the zirconia-based material meets at least one of the following conditions: a) The zirconia-based material comprises one or more of zirconium dioxide, yttrium oxide stabilized zirconia and scandium oxide stabilized zirconia; b) The crystal structure of the zirconia-based material comprises tetragonal phase and/or cubic phase; c) The particle size of the zirconia-based material ranges from 0.1 μm to 0.5 μm.
  8. 8. The composite material of claim 6, wherein: the pore-forming material meets at least one of the following conditions: d) The pore-forming material comprises one or more of corn starch and polymethyl methacrylate; e) The grain diameter of the pore-forming material is in the range of 0.3 μm to 0.5 μm.
  9. 9. The composite material of claim 7, wherein: The zirconia-based slurry comprises the following components in parts by mass: 8-13 parts of pore-forming materials; and/or the particle size of the pore-forming material is in the range of 0.35-0.45 μm.
  10. 10. The composite material of claim 6, wherein: The first solvent comprises water or one or more of absolute ethyl alcohol, methyl ethyl ketone, toluene, xylene, isopropanol and terpineol, and/or the first binder comprises one or more of polyvinyl butyral, polyvinyl alcohol and ethyl cellulose.
  11. 11. A process for the preparation of a composite material as claimed in any one of claims 1 to 10, characterized in that the process comprises: coating a ceramic layer (20) on at least part of the surface of a substrate (10) with a zirconia-based slurry, wherein the thickness of the zirconia-based slurry ranges from 20 mu m to 200 mu m; Coating at least part of one side of the ceramic layer (20) facing away from the matrix (10) with glass slurry to form a glass layer (30), wherein the thickness of the glass slurry ranges from 50 mu m to 300 mu m; Wherein, the glass slurry comprises the following components in parts by weight: Oxide, 60 to 80 parts; 15 to 35 parts of a second solvent; 3 to 7 parts of a second binder; 1 to 2 parts of dispersant.
  12. 12. The method of preparing a composite material according to claim 11, wherein: The oxide includes a first oxide and a second oxide; Wherein the glass paste satisfies at least one of the following conditions: f) The first oxide comprises one or more of calcium oxide, aluminum oxide and magnesium oxide; g) The second oxide comprises one or more of silicon oxide, sodium oxide, bismuth oxide, boron oxide, titanium oxide, cerium oxide, barium oxide, strontium oxide, lithium oxide and zinc oxide; h) The mass ratio of the first oxide to the second oxide is (27-30): 33-39.
  13. 13. The method of preparing a composite material according to claim 11, wherein: the second solvent comprises water, or the second solvent comprises one or more of absolute ethanol, methyl ethyl ketone, toluene, xylene, isopropanol, terpineol; and/or the second binder comprises one or more of polyvinyl butyral, polyvinyl alcohol, ethylcellulose; and/or the dispersant comprises one or more of triethanolamine or polyacrylic acid.

Description

Composite material, preparation method thereof and zirconia-based slurry Technical Field The application relates to the technical field of heat insulation protection of conductive materials, in particular to a composite material, a preparation method thereof and zirconia-based slurry. Background The metal material is a substance having a crystal structure and mainly composed of a metal element. The composite material has the core characteristics of high strength, good plasticity and toughness, and can be processed into complex parts through various processes such as casting, forging, welding and the like, and is an indispensable basic material in aerospace, automobile manufacturing, building structures and daily necessities. In some cases, the metallic material is often coated with a coating or other insulating means for safety reasons, and the coating of the metallic material may be stripped or broken. Disclosure of Invention In view of the above, the application provides a composite material, which aims to solve the technical problem that the composite material is cracked under high temperature heating to cause insulation failure. Another object of the present application is to provide a method for preparing a composite material, which aims to solve the above technical problems. Another object of the present application is to provide a zirconia-based slurry, which aims to solve the technical problem of cracking of the ceramic layer at high temperature. The application provides a composite material which comprises a substrate, a ceramic layer, a glass layer and a glass layer, wherein the ceramic layer is covered on at least part of the surface of the substrate, the ceramic layer comprises a pore-forming agent, the glass layer is covered on at least part of one side of the ceramic layer, which is away from the substrate, wherein the pore-forming agent is configured to be gasified when a first temperature T 1 is reached, the glass layer is configured to be at least partially converted into a molten glass body when a second temperature T 2 is reached, and the glass layer is T 2＞T1. Alternatively, in some embodiments of the application, the first temperature T 1 satisfies 350 ℃ T 1 ℃ to 450 ℃. Alternatively, in some embodiments of the application, the second temperature T 2 satisfies 900 ℃ T 2 ℃ to 1000 ℃. Alternatively, in some embodiments of the application, the glass layer has a linear thermal expansion coefficient ranging from 13X 10 -6/K to 19X 10 -6/K. Alternatively, in some embodiments of the application, the ceramic layer has a linear thermal expansion coefficient ranging from 10X 10 -6/K to 12X 10 -6/K. Alternatively, in some embodiments of the application, the linear thermal expansion coefficient of the substrate may range from 10X 10 -6/K to 18X 10 -6/K. Optionally, in some embodiments of the present application, the substrate is made of metal. Alternatively, in some embodiments of the application, the thermal conductivity of the ceramic layer ranges from 2.0W/mK to 3.3W/mK. As a second aspect of the present application, an embodiment of the present application provides a zirconia-based slurry for preparing a ceramic layer of a composite material as described above, the zirconia-based slurry comprising, in parts by mass: 50 to 70 parts of a zirconia-based material; 5 to 15 parts of pore-forming materials; 20to 30 parts of a first solvent; and 3 to 5 parts of a first binder. Optionally, in some embodiments of the application, the zirconia-based material meets at least one of the following conditions: a) The zirconia-based material comprises one or more of zirconium dioxide, yttrium oxide stabilized zirconia and scandium oxide stabilized zirconia; b) The crystal structure of the zirconia-based material comprises tetragonal phase and/or cubic phase; c) The particle size of the zirconia-based material ranges from 0.1 μm to 0.5 μm. Optionally, in some embodiments of the application, the pore-forming material meets at least one of the following conditions: d) The pore-forming material comprises one or more of corn starch and polymethyl methacrylate; e) The grain diameter of the pore-forming material is in the range of 0.3 μm to 0.5 μm. Optionally, in some embodiments of the present application, the zirconia-based slurry includes, in parts by weight: 8-13 parts of pore-forming materials; and/or the particle size of the pore-forming material is in the range of 0.35-0.45 μm. Alternatively, in some embodiments of the application, the first solvent comprises water, or the first solvent comprises one or more of absolute ethanol, methyl ethyl ketone, toluene, xylene, isopropanol, terpineol. Optionally, in some embodiments of the application, the first binder comprises one or more of polyvinyl butyral, polyvinyl alcohol, ethylcellulose. As a third aspect of the present application, an embodiment of the present application provides a method for preparing a composite material as described above, the method comprisi