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采取软、硬二种沥青与一,二,四苯基硅烷混合物共炭化方式,考察了硅取代聚芳烃中间相的生成.该炭化过程在反应釜中进行,控制实验条件如下:氩气压强1MPa,温度440℃,热裂解时间5h～10h.研究表明:含2%元素硅的初始混合物,不生成硅取代中间相;添加1.0%和0.5%元素硅的硬沥青炭化时明显生成硅取代中间相,但不是单一相.热裂解残留物是硅取代中间相体和均匀分散其中的无硅中间相小球体构成的复合相.“,”Formation of a silicon-substituted polyaromatic mesophase was investigated by co-pyrolysis of mixtures of a soft and a hard pitch with mono-, di- and tetraphenylsilane. The studies were performed in autoclaves at a constant argon pressure of 1MPa and a temperature of 440℃ using pyrolysis times of 5 and 10h. With 2% silicon in the starting mixtures a silicon substituted mesophase is not formed. Studies with the hard pitch and lower silicon additions of 1.0 and 0.5% clearly show formation of a silicon-substituted mesophase, but not as a single phase. The pyrolysis residues are composed of a silicon-substituted bulk mesophase in which mesophase spherolites without silicon are homogeneously dispersed.