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Preparing method for graphene heat conduction sheet
The invention discloses a preparing method for a graphene heat conduction sheet. The preparing method includes the steps that graphene nanosheet powder and high-softening-point coal pitch powder are added into absolute ethyl alcohol in proportion, and the mixture is subjected to ultrasonic processing, suction filtration and drying; obtained mixed powder is guided into a mold and subjected to cold pressing for 3 min to 5 min at 15 MPa to 20 MPa to achieve forming, a cold-pressed sheet is clamped between high-temperature alloy molds, pressure is applied, the sheet is processed for 1 h to 3 h at the temperature of 500 DEG C to 800 DEG C in nitrogen or argon or helium atmosphere, and a hot-rolled sheet is obtained; the hot-rolled sheet is arranged in a high-temperature tube furnace and processed for 1 h to 3 h at the temperature of 900 DEG C to 1,200 DEG C in nitrogen or argon or helium atmosphere, and a carbonized sheet is obtained; the carbonized sheet is arranged in a high-temperature graphitizing furnace and processed for 0.5 h to 2 h at the temperature of 2,300 DEG C to 2,700 DEG C in nitrogen or argon or helium atmosphere, and the graphitized graphene sheet is obtained. The prepared graphitized graphene sheet has high heat conduction anisotropism, the preparing method of the graphitized graphene sheet is simple, and industrial production is facilitated.
Preparing method for graphene heat conduction sheet
The invention discloses a preparing method for a graphene heat conduction sheet. The preparing method includes the steps that graphene nanosheet powder and high-softening-point coal pitch powder are added into absolute ethyl alcohol in proportion, and the mixture is subjected to ultrasonic processing, suction filtration and drying; obtained mixed powder is guided into a mold and subjected to cold pressing for 3 min to 5 min at 15 MPa to 20 MPa to achieve forming, a cold-pressed sheet is clamped between high-temperature alloy molds, pressure is applied, the sheet is processed for 1 h to 3 h at the temperature of 500 DEG C to 800 DEG C in nitrogen or argon or helium atmosphere, and a hot-rolled sheet is obtained; the hot-rolled sheet is arranged in a high-temperature tube furnace and processed for 1 h to 3 h at the temperature of 900 DEG C to 1,200 DEG C in nitrogen or argon or helium atmosphere, and a carbonized sheet is obtained; the carbonized sheet is arranged in a high-temperature graphitizing furnace and processed for 0.5 h to 2 h at the temperature of 2,300 DEG C to 2,700 DEG C in nitrogen or argon or helium atmosphere, and the graphitized graphene sheet is obtained. The prepared graphitized graphene sheet has high heat conduction anisotropism, the preparing method of the graphitized graphene sheet is simple, and industrial production is facilitated.
Preparing method for graphene heat conduction sheet
JIN SHUANGLING (author) / GAO QIAN (author) / JIN MINGLIN (author) / ZHANG RUI (author) / SHAO XIA (author)
2016-01-20
Patent
Electronic Resource
English
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