Method of making carbon foam at low pressure
    2.
    发明授权
    Method of making carbon foam at low pressure 有权
    在低压下制造碳泡沫的方法

    公开(公告)号:US06797251B1

    公开(公告)日:2004-09-28

    申请号:US10004781

    申请日:2001-12-04

    IPC分类号: C01B3102

    摘要: Methods of treating a carbon foam precursor to facilitate subsequent foaming of the material at low pressures, which may be on the order of about 0.5 to 1.5 atmospheres, are disclosed. In one embodiment, the carbon foam precursor is subjected to partial devolatilization under controlled conditions with subsequent foaming being effected at low pressure. The carbon foam precursor may be one of various forms of coal including raw coal, coal extract mesophase pitch, synthetic mesophase pitch or petroleum based pitch. The prefoaming treatment of the carbon foam precursor may remove a portion of the internal blowing agent and may alter the fluidity of the carbon foam precursor matrix. In another embodiment, the precursor after being converted into a powder is subjected to oxidation prior to foaming.

    摘要翻译: 公开了处理碳泡沫前体以促进材料在低压下的随后发泡的方法,其可以在约0.5至1.5个大气压的数量级上。 在一个实施方案中,将碳泡沫前体在受控条件下进行部分脱挥发分,随后在低压下进行发泡。 碳泡沫前体可以是各种形式的煤之一,包括原煤,煤提取物中间相沥青,合成中间相沥青或石油基沥青。 碳泡沫前体的预发泡处理可以去除一部分内部发泡剂并且可以改变碳泡沫前体基质的流动性。 在另一个实施方案中,转化成粉末后的前体在发泡之前经历氧化。