CN106588027A - 一种高密度氮化硼陶瓷制造方法 - Google Patents

一种高密度氮化硼陶瓷制造方法 Download PDF

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Publication number
CN106588027A
CN106588027A CN201611134243.XA CN201611134243A CN106588027A CN 106588027 A CN106588027 A CN 106588027A CN 201611134243 A CN201611134243 A CN 201611134243A CN 106588027 A CN106588027 A CN 106588027A
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boron nitride
nitride ceramic
hot
hexagonal boron
press
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刘树峰
李慧
鲁飞
刘小鱼
孙良成
邢正茂
王峰
白洋
成宇
陈蓓薪
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Baotou Rare Earth Research Institute
Ruike Rare Earth Metallurgy and Functional Materials National Engineering Research Center Co Ltd
Santoku Corp
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Baotou Rare Earth Research Institute
Ruike Rare Earth Metallurgy and Functional Materials National Engineering Research Center Co Ltd
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    • 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
    • C04B35/58—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 borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
    • C04B35/583—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 borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on boron nitride
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    • 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
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Abstract

本发明涉及一种高密度氮化硼陶瓷材料制造方法，其特征是：将氮化硼粉料装入模具，采用热压烧结炉在真空环境下热压成型，所述热压温度为1650～1800℃，成型压力为19～40MPa，保温保压1～2小时。其优点是：本发明制备工艺简单、周期短、能耗小，所制造的不添加其他添加剂的六方氮化硼陶瓷相对密度高、外部无裂纹、内部无孔隙；BN具有低的热膨胀系数，抗急冷急热性能极好，高温冷却循环后不出现裂纹。

Description

一种高密度氮化硼陶瓷制造方法
技术领域
本发明涉及一种高密度氮化硼陶瓷材料制造方法，属于材料制备领域。
背景技术
六方氮化硼属于共价键的难熔化合物，因原子之间结合较紧，原子扩散困难，因此烧结性差。不添加其他添加剂的六方氮化硼，采用传统固相烧结法无法得到致密产品，且烧结工艺、设备复杂、能耗大、周期长。陶瓷制品韧性较差，使用过程中易出现脆性断裂，导致其不能承受较大的机械冲击和热冲击，抗热震性不佳。
发明内容
本发明的目的是为解决传统制备工艺的上述缺点，提供一种高密度氮化硼陶瓷制造方法，该方法对不添加其他添加剂的六方氮化硼，采用热压烧结技术制备高密度氮化硼陶瓷，实现成型和烧结同步进行，目的是保证粉料颗粒紧密接触，加速致密化，所制造的陶瓷相对密度高、外部无裂纹、内部无孔隙。
本发明的技术方案如下：
将氮化硼粉料装入模具，采用热压烧结炉在真空环境下热压成型，所述热压温度为1650～1800℃，成型压力为19～40MPa，保温保压1～2小时。
所述模具为石墨模具；
所述真空环境的真空度高于1×10-2Pa。
本发明与背景技术相比，具有的有益效果是：本发明制备工艺简单、周期短、能耗小，所制造的不添加其他添加剂的六方氮化硼陶瓷相对密度高、外部无裂纹、内部无孔隙；BN具有低的热膨胀系数，抗急冷急热性能极好，高温冷却循环后不出现裂纹。
附图说明
图1是实施例1中，制备的高密度氮化硼陶瓷材料的X射线衍射图谱。
具体实施方式
实施例1：
本实施例为：将氮化硼粉料装入石墨模具，采用热压烧结炉在真空环境下热压成陶瓷材料，真空度高于1×10-2Pa，热压温度为1650℃，成型压力为30MPa，保温保压1.5小时。
经上述工艺可以获得高密度氮化硼陶瓷，X射线衍射图谱见附图1。陶瓷相对密度98.6%，抗热震性好，升温至1500℃，随炉冷却至室温，陶瓷外观完整，无裂纹和隐裂出现。
实施例2：
本实施例为：将氮化硼粉料装入石墨模具，采用热压烧结炉在真空环境下热压成陶瓷材料，热压温度为1750℃，成型压力为30MPa，保温保压1.5小时，获得的高纯氮化硼陶瓷相对密度99.0%，抗热震性好，升温至1500℃，随炉冷却至室温，陶瓷外观完整，无裂纹和隐裂出现。
实施例3：
本实施例为：将氮化硼粉料装入石墨模具，采用热压烧结炉在真空环境下热压成陶瓷材料，热压温度为1800℃，成型压力为30MPa，保温保压2小时，获得的高纯氮化硼陶瓷相对密度99.2%，抗热震性好，升温至1500℃，随炉冷却至室温，陶瓷外观完整，无裂纹和隐裂出现。

Claims (3)

1.一种高密度氮化硼陶瓷材料制造方法，其特征是：将氮化硼粉料装入模具，采用热压烧结炉在真空环境下热压成型，所述热压温度为1650～1800℃，成型压力为19～40MPa，保温保压1～2小时。
2.根据权利要求1所述的高密度氮化硼陶瓷材料制造方法，其特征是：所述模具为石墨模具。
3.根据权利要求1所述的高密度氮化硼陶瓷材料制造方法，其特征是：所述真空环境的真空度高于1×10-2Pa。
CN201611134243.XA 2016-12-10 2016-12-10 一种高密度氮化硼陶瓷制造方法 Pending CN106588027A (zh)

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CN110330349A (zh) * 2019-07-05 2019-10-15 中国人民解放军军事科学院国防科技创新研究院 一种氮化硅纳米纤维增强氮化硼陶瓷及其制备方法
CN112125677A (zh) * 2020-09-24 2020-12-25 郑州方铭高温陶瓷新材料有限公司 一种可调节复合材料热膨胀率及导热率的陶瓷制备工艺

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110330349A (zh) * 2019-07-05 2019-10-15 中国人民解放军军事科学院国防科技创新研究院 一种氮化硅纳米纤维增强氮化硼陶瓷及其制备方法
CN112125677A (zh) * 2020-09-24 2020-12-25 郑州方铭高温陶瓷新材料有限公司 一种可调节复合材料热膨胀率及导热率的陶瓷制备工艺

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