粘结剂炭的结构与抗氧化性

Structure and Oxidation Resistance of Binder-based Carbon

研究了中间相沥青和酚醛树脂粘结剂及其热解炭的抗氧化性 ,通过 X- ray衍射、扫描电镜、粘结剂残炭率及炭真密度测定 ,综合评价中间相沥青用作镁炭砖粘结剂的可行性。结果表明 ,中间相沥青的抗氧化性明显优于酚醛树脂 ;中间相沥青炭结构致密 ,有取向性 ,呈石墨化炭结构 ;而酚醛树脂质炭结构疏松 ,无取向性 ,呈难石墨化炭结构。中间相沥青残炭率为 65 .5 3% ,炭真密度为1 .91 g/cm3 ;酚醛树脂残炭率为 49.40 % ,炭真密度为 1 .73g/cm3 。可以看出 。

The oxidation resistance of the binders of mesophase pitch and phenolic resin as well as its residual carbon was studied and the possibility of mesophase pitch used as a binder for MgO C brick was evaluated through the determination of X ray diffraction, scanning electron microscope, the residual carbon of binder and true specific density of carbon. Experimental results show that the oxidation resistance of mesophase pitch is obviously better than that of phenolic resin; the residual carbon of mesophase pitch is a compact oriented and graphited carbon; while the residual carbon of phenolic resin is a loose, nonoriented and nongraphited one;the percentage of residual carbon in mesophase pitch is 65.53% and its true specific density is 1.91g/cm 3; the percentage of residual carbon in phenolic resin is 49.40% and its ture specific density is 1.73g/cm 3. The results also indicate that the oxidation resistance of binder based carbon is dependent on its microstructure.