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SiAlCN(O) ceramic nano fiber, and preparation method and application thereof

A nanofiber and ceramic technology, applied in the field of SiAlCN ceramic nanofibers and their preparation, can solve problems such as application field limitations, and achieve the effects of simple process operation, low sintering temperature and cost saving

Inactive Publication Date: 2018-11-30
中科广化(重庆)新材料研究院有限公司 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the traditional ceramic fiber materials are mainly aluminum silicate fibers, and the main application fields are mostly limited to temperature-resistant and refractory materials.

Method used

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  • SiAlCN(O) ceramic nano fiber, and preparation method and application thereof
  • SiAlCN(O) ceramic nano fiber, and preparation method and application thereof
  • SiAlCN(O) ceramic nano fiber, and preparation method and application thereof

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Embodiment 1

[0039] A preparation method of SiAlCN (O) ceramic nanofibers, comprising the following steps:

[0040] (1) Preparation of polyaluminosilazane

[0041] Repeatedly evacuate the Schlenk reaction bottle and fill it with high-purity argon for at least three times to ensure that the air and water in the bottle are completely discharged. Then add 100ml of anhydrous tetrahydrofuran with a syringe, and then add 15g of methylvinyldichlorosilane, methylhydrogen Dichlorosilane 0.5g, pass high-purity ammonia gas (purity 99.9999%) at 0°C for 2.5h and continue to react for 2h, then add 3.1g of octadecyl isocyanate to react overnight, and distill off the solvent under reduced pressure to obtain a viscous 12.5ml of a toluene solution of diisobutylaluminum hydride (the concentration of diisobutylaluminum hydride is 2M) was slowly added dropwise at 0°C to the liquid polysilazane, and added dropwise After completion, the temperature was raised to room temperature, reacted for 24 hours, and disti...

Embodiment 2

[0047] A preparation method of SiAlCN (O) ceramic nanofibers, comprising the following steps:

[0048] (1) Preparation of polyaluminosilazane

[0049]Repeatedly evacuate the Schlenk reaction bottle and fill it with high-purity argon for at least three times to ensure that the air and water in the bottle are completely discharged. Then add 100ml of anhydrous tetrahydrofuran with a syringe, and then add 11.12g of methylvinyldichlorosilane, methyl Hydrogen dichlorosilane 0.5g, pass through high-purity ammonia gas (purity 99.9999%) at 0°C for 2.5h after ammonolysis, then react for 2h under the protection of argon; add 8g of octadecyl isocyanate to react overnight, and remove by distillation under reduced pressure solvent, to obtain viscous liquid polysilazane; at 0°C, slowly dropwise add 12.5ml of a toluene solution of diisobutylaluminum hydride (the concentration of diisobutylaluminum hydride is 2M) to the liquid polysilazane After the dropwise addition, the temperature was rais...

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Abstract

The invention discloses an SiAlCN(O) ceramic nano fiber, and a preparation method and application thereof. The preparation method comprises the following steps: (1) preparation of polyaluminium silazane; (2) preparation of SiAlCN(O) nano fibers; and (3) preparation of the SiAlCN(O) ceramic nano fibers. According to the SiAlCN(O) ceramic nano fiber provided by the invention, the polyaluminium silazane synthesized by using a toluene solution of methyl vinyl dichlorosilane, methylhydrodichlorosilane and diisobutylaluminium hydride is taken as a raw material, and the nano ceramic fiber is obtainedthrough a high-temperature pyrolysis method after electrostatic spinning. The technological operation of the preparation method provided by the invention is simple, the sintering temperature is low,energy consumption is reduced, and cost is saved.

Description

technical field [0001] The invention belongs to the field of ceramic materials, and in particular relates to a SiAlCN(O) ceramic nanofiber and a preparation method and application thereof. Background technique [0002] Ceramic materials have excellent characteristics such as light weight, good thermal stability, high temperature resistance, and low electrical conductivity. In recent years, non-oxidized ceramics have attracted widespread attention due to their controllable structure and better high temperature and corrosion resistance. SiAlCN ceramics have good high temperature stability, oxidation resistance and suitable mechanical strength, and have good chemical compatibility with various inorganic fiber reinforcements and ceramic substrates. Studies have shown that this quaternary system ceramic has excellent corrosion resistance and oxidation resistance. [0003] Ceramic fiber is a kind of fibrous lightweight refractory material, which has the advantages of light weight...

Claims

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Application Information

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IPC IPC(8): C04B35/622C01B21/082
CPCC01B21/0828C01P2004/10C01P2004/61C04B35/62295C04B2235/606C04B2235/656C04B2235/6567C04B2235/658
Inventor 王斌冯颖徐兵兵
Owner 中科广化(重庆)新材料研究院有限公司
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