Method for preparing SiOCN ceramic

A technology for ceramics and mixtures, applied in the field of preparation of SiOCN ceramics, can solve the problems of uncontrollable composition, high cost, complicated preparation process, etc., and achieve the effects of uniform composition, low cost and simple preparation process

Inactive Publication Date: 2009-10-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing SiOCN ceramics in order to solve the problems of difficult control of components, complex preparation process and high cost in the existing preparation methods of SiOCN materials.

Method used

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Experimental program
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Effect test

specific Embodiment approach 1

[0008] Specific Embodiment 1: The preparation method of SiOCN ceramics in this embodiment is carried out according to the following steps: 1. The compound containing silicon-hydrogen bonds is mixed with allylamine according to the ratio of Si-H / C=C molar ratio of 0.5 to 16, and then added The platinum catalyst is mixed evenly to obtain a mixture, wherein the amount of the platinum catalyst is that the mass of the Pt element is 0.0005% to 0.020% of the mass of the mixture; 2. The mixture in step 1 is kept at 100°C to 200°C for 3 to 15 hours to obtain SiOCN Precursor; 3. SiOCN precursors are heated to 900-1400°C at a heating rate of 1-20°C / min in a tube furnace under atmosphere protection conditions and kept for 0.5-2h, and then cooled with the furnace to prepare SiOCN ceramics .

[0009] In the first step of this embodiment, Si-H is the active group of the compound containing silicon-hydrogen bond; the molecular formula of allylamine is CH 2 =CHCH 2 NH 2 .

[0010] The SiOC...

specific Embodiment approach 2

[0011] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, the compound containing silicon-hydrogen bonds and allylamine are mixed according to the molar ratio of Si-H / C=C in the range of 1-13. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0012] Embodiment 3: This embodiment is different from Embodiment 1 or Embodiment 2 in that the hydrogen-containing siloxane is tetramethylcyclotetrasiloxane or tetramethyldihydrosiloxane. Other steps and parameters are the same as those in Embodiment 1 or 2.

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PUM

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Abstract

A method for preparing SiOCN ceramic belongs to the field for preparing ceramic. The invention settles the problems of uneasy controlling of component, complex preparing process and low cost existing in the prior method for preparing SiOCN material. The method of the invention comprises the following steps: 1. mixing the compound containing silicon-hydrogen bond with allyl amine, then adding platinum catalyst and mixing to uniform for obtaining the compound; 2. preparing SiOCN precursor; and 3. preparing the SiOCN ceramic through pyrolysis. The preparing method according to the invention has an advantage of low cost. The high-temperature performance of prepared SiOCN ceramic is excellent. The prepared SiOCN ceramic can be used in a condition with temperature higher than 1400 DEG C. The application range of prepared SiOCN is wide.

Description

technical field [0001] The invention belongs to the field of ceramic preparation, and in particular relates to a preparation method of SiOCN ceramics. Background technique [0002] When divalent O in the quartz glass system is replaced by tetravalent C or trivalent N, its molecular structure will be more stable, and the high temperature performance and mechanical properties of the material will be improved. However, it is difficult to connect C or N into the Si-O system by the traditional high-temperature sintering method, but it can be realized at about 1000 °C by the precursor conversion method. A large number of studies on Si-O-C and Si-C-N system materials prepared by the precursor method have found that these materials exhibit excellent mechanical, chemical, and high-temperature properties. SiOCN system materials have become a new research hotspot due to the combination of the advantages of these two types of materials. In the existing reports, the synthesis of SiOCN ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B35/515
Inventor 温广武白宏伟黄小萧韩兆祥张晓东钟博
Owner HARBIN INST OF TECH
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