【摘 要】
：
以具有良好自烧结性的中间相炭微球(MCMB)超细粉末(0.1~0.5μm)为原料,经模压成型、烧结炭化/石墨化后,制得了性能良好的高密度各向同性炭/石墨材料.研究用热分析、扫描电镜
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以具有良好自烧结性的中间相炭微球(MCMB)超细粉末(0.1~0.5μm)为原料,经模压成型、烧结炭化/石墨化后,制得了性能良好的高密度各向同性炭/石墨材料.研究用热分析、扫描电镜和XRD等方法,探索了该粉末特性、成型、烧结等过程对制品性能的影响,重点观察分析了材料的微观结构,并对所得炭材料的力学强度、导电、透气性等主要性能进行了测试与研究.另外,该研究根据粉末特性,探索出热压双保温工艺,改善了压坯的层裂、掉角等问题,但一个明显的问题是,难于控制收缩裂纹,废品率高.该研究借鉴这些无机非金属材料领域的基本原理和研究思路,结合有机物前驱体的炭化化学机理,初步探索了MCMB超细粉末自烧结过程中颗粒的物质迁移机制及其致密化规律.另外,该课题对所得材料的力学强度、导电、透气性等主要性能进行了研究,试图拓展其应用领域-质子交换膜燃料电池双极板(PEMFC);同时针对高温气冷堆用核石墨的要求,测试了材料的力学参数.
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