CN107522488A - 高导热石墨的制备方法 - Google Patents

高导热石墨的制备方法 Download PDF

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CN107522488A
CN107522488A CN201610458138.5A CN201610458138A CN107522488A CN 107522488 A CN107522488 A CN 107522488A CN 201610458138 A CN201610458138 A CN 201610458138A CN 107522488 A CN107522488 A CN 107522488A
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heat conduction
preparation
high heat
graphite
conduction graphite
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沈玉忠
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Zhangjiagang Free Trade Zone Guanxiang Trade Co Ltd
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Zhangjiagang Free Trade Zone Guanxiang Trade Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
    • C04B35/522—Graphite
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
    • C04B35/528—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained from carbonaceous particles with or without other non-organic components
    • C04B35/532—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained from carbonaceous particles with or without other non-organic components containing a carbonisable binder
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/74—Physical characteristics
    • C04B2235/77—Density
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient

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  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

本申请公开了一种高导热石墨的制备方法，以天然鳞片石墨和中间相沥青分别骨科和粘结剂，采用一次热压成型、高温热处理获得导热石墨。本发明获得的石墨体积密度达到1.9g/m3以上。其热导率达到630W/m.K以上。

Description

高导热石墨的制备方法
技术领域
本申请属于材料技术领域，特别是涉及一种高导热石墨的制备方法。
背景技术
随着科技的发展，结构-功能一体化散热材料在航天航空、核工业、军工等领域越来越重要。像导弹和航天飞行器的鼻锥体、固体火箭发动机喷管、核聚变第一壁材料等部位需要在复杂和苛刻的环境中工作，需承受高温或高的热流密度以及较大冷热环境温差的变化，这就要求材料具有高力学性能的同时具有优异的热传导性能以便于其与外界的热能交换，控制自身温度变化以适应工作环境的变化。
传统的金属导热材料由于存在自身密度较大、比热导率较低、热膨胀系数较高、材料不纯使其热导率大幅度下降等问题，已很难满足目前日益增长的散热需求。
对于热管理材料来说，最重要的性能要求是材料具有较高的热导率。
发明内容
本发明的目的在于提供一种高导热石墨的制备方法，以克服现有技术中的不足。
为实现上述目的，本发明提供如下技术方案：
本申请实施例公开一种高导热石墨的制备方法，以天然鳞片石墨和中间相沥青分别骨科和粘结剂，采用一次热压成型、高温热处理获得导热石墨。
优选的，在上述的高导热石墨的制备方法中，热压成型温度400～500℃，热压压强8～10MPa，热压时间4～5小时。
优选的，在上述的高导热石墨的制备方法中，高温热处理的温度为2800～3000℃。
本申请还公开了一种高导热石墨的制备方法，包括步骤：
(1)、将天然鳞片石墨和沥青粘结剂混合并球磨；
(2)、在400～500℃下进行一次热压成型，热压压强8～10MPa，热压时间4～5小时；
(3)、在2800～3000℃进行高温热处理，获得高导热石墨。
优选的，在上述的高导热石墨的制备方法中，步骤(1)中，磨球直径4～6mm，球料比为(7～10)：1，球磨转速500～600转/min，球磨时间5～7小时。
优选的，在上述的高导热石墨的制备方法中，步骤(1)中，天然鳞片的含量为86wt.％；沥青粘结剂的含量为14wt.％。
与现有技术相比，本发明的优点在于：本发明获得的石墨体积密度达到1.9g/m3以上。其热导率达到630W/m.K以上。
具体实施方式
本发明通过下列实施例作进一步说明：根据下述实施例，可以更好地理解本发明。然而，本领域的技术人员容易理解，实施例所描述的具体的物料比、工艺条件及其结果仅用于说明本发明，而不应当也不会限制权利要求书中所详细描述的本发明。
实施例1
高导热石墨的制备方法
以天然鳞片石墨和中间相沥青分别骨科和粘结剂，采用一次热压成型、高温热处理获得导热石墨。
(1)、将天然鳞片石墨和沥青粘结剂混合并球磨，磨球直径4～6mm，球料比为(7～10)：1，球磨转速500～600转/min，球磨时间5～7小时；
(2)、在500℃下进行一次热压成型，热压压强10MPa，热压时间5小时；
(3)、在2800℃进行高温热处理，获得高导热石墨。
天然鳞片的含量为86wt.％；沥青粘结剂的含量为14wt.％。
获得的石墨体积密度达到1.9g/m3以上。其热导率达到630W/m.K以上。
实施例2
高导热石墨的制备方法
(1)、将天然鳞片石墨和沥青粘结剂混合并球磨，磨球直径4～6mm，球料比为(7～10)：1，球磨转速500～600转/min，球磨时间5～7小时；
(2)、在500℃下进行一次热压成型，热压压强8MPa，热压时间5小时；
(3)、在3000℃进行高温热处理，获得高导热石墨。
天然鳞片的含量为86wt.％；沥青粘结剂的含量为14wt.％。
热导率达到621W/m.K。
实施例3
高导热石墨的制备方法
(1)、将天然鳞片石墨和沥青粘结剂混合并球磨，磨球直径4～6mm，球料比为(7～10)：1，球磨转速500～600转/min，球磨时间5～7小时；
(2)、在400℃下进行一次热压成型，热压压强8MPa，热压时间4小时；
(3)、在2900℃进行高温热处理，获得高导热石墨。
天然鳞片的含量为86wt.％；沥青粘结剂的含量为14wt.％。
热导率达到613W/m.K。
最后，还需要说明的是，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。

Claims (6)

1.一种高导热石墨的制备方法，其特征在于：以天然鳞片石墨和中间相沥青分别骨科和粘结剂，采用一次热压成型、高温热处理获得导热石墨。
2.根据权利要求1所述的高导热石墨的制备方法，其特征在于：热压成型温度400～500℃，热压压强8～10MPa，热压时间4～5小时。
3.根据权利要求1所述的高导热石墨的制备方法，其特征在于：高温热处理的温度为2800～3000℃。
4.一种高导热石墨的制备方法，其特征在于，包括步骤：
(1)、将天然鳞片石墨和沥青粘结剂混合并球磨；
(2)、在400～500℃下进行一次热压成型，热压压强8～10MPa，热压时间4～5小时；
(3)、在2800～3000℃进行高温热处理，获得高导热石墨。
5.根据权利要求4所述的高导热石墨的制备方法，其特征在于：步骤(1)中，磨球直径4～6mm，球料比为(7～10)：1，球磨转速500～600转/min，球磨时间5～7小时。
6.根据权利要求4所述的高导热石墨的制备方法，其特征在于：步骤(1)中，天然鳞片的含量为86wt.％；沥青粘结剂的含量为14wt.％。
CN201610458138.5A 2016-06-22 2016-06-22 高导热石墨的制备方法 Withdrawn CN107522488A (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022205970A1 (zh) * 2021-03-31 2022-10-06 国家能源投资集团有限责任公司 高导热蓄热材料及其制备方法与应用、用于制备高导热蓄热材料的组合物及其应用

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022205970A1 (zh) * 2021-03-31 2022-10-06 国家能源投资集团有限责任公司 高导热蓄热材料及其制备方法与应用、用于制备高导热蓄热材料的组合物及其应用

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Application publication date: 20171229