Preparation method of graphene ball toughened SiCN ceramic
A technology of graphene spheres and graphene, which is applied in the field of SiCN ceramic preparation, can solve problems such as the complexity of the preparation process, and achieve the effects of simple conditions, high hardness, and improved compression resistance
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[0021] Example 1
[0022] The preparation of the graphene ball toughened SiCN ceramic in this embodiment includes the following steps:
[0023] 1. The beaker was ultrasonically cleaned twice with deionized water and absolute ethanol, and dried. Use an electronic balance with an accuracy of 0.1 mg to weigh 5 mg of graphene oxide into a beaker. Measure 5ml of absolute ethanol in a beaker with a graduated cylinder, and seal it quickly. Put it into an ultrasonic cleaning machine with 220W power for 30min to obtain graphene oxide anhydrous ethanol dispersion A with a concentration of 1mg / ml.
[0024] 2. Weigh 3g of polysilazane in a beaker with an electronic balance, measure 1ml of dispersion A with a graduated cylinder and add it to the polysilazane liquid, stir for 30 minutes to obtain a mixed solution B.
[0025] 3. Add the mixed solution B into a container folded in tin foil, put it in a tube furnace, and cross-link in a nitrogen atmosphere. The crosslinking temperature is 300°C, th...
Example Embodiment
[0031] Example 2
[0032] The preparation of the graphene ball toughened SiCN ceramic in this embodiment includes the following steps:
[0033] 1. The beaker was ultrasonically cleaned twice with deionized water and absolute ethanol, and dried. Weigh 10 mg of graphene oxide into a beaker using an electronic balance with an accuracy of 0.1 mg. Measure 5ml of absolute ethanol in a beaker with a graduated cylinder, and seal it quickly. Put it into an ultrasonic cleaning machine with 220W power for 30min to obtain graphene oxide anhydrous ethanol dispersion A with a concentration of 2mg / ml.
[0034] 2. Weigh 3g of polysilazane in a beaker with an electronic balance, measure 1ml of dispersion A with a graduated cylinder and add it to the polysilazane liquid, stir for 1h, and ultrasound for 30min to obtain mixed solution B.
[0035] 3. Add the mixed solution B into a container folded in tin foil, put it in a tube furnace, and cross-link in a nitrogen atmosphere. The crosslinking temperat...
Example Embodiment
[0041] Example 3
[0042] The preparation of the graphene ball toughened SiCN ceramic in this embodiment includes the following steps:
[0043] 1. The beaker was ultrasonically cleaned twice with deionized water and absolute ethanol, and dried. Weigh 10 mg of graphene oxide into a beaker using an electronic balance with an accuracy of 0.1 mg. Measure 5ml of absolute ethanol in a beaker with a graduated cylinder, and seal it quickly. Put it into an ultrasonic cleaning machine with 220W power for 30min to obtain graphene oxide anhydrous ethanol dispersion A with a concentration of 2mg / ml.
[0044] 2. Weigh 3g of polysilazane in a beaker with an electronic balance, measure 1ml of dispersion A with a graduated cylinder and add it to the polysilazane liquid, stir for 1h, and ultrasound for 30min to obtain mixed solution B.
[0045] 3. Add the mixed solution B into a container folded in tin foil, put it in a tube furnace, and cross-link in a nitrogen atmosphere. The cross-linking tempera...
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