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
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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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