Mesocarbon microbeads (MCMBs) were a kind of functional artificial carbon materials, which was widely used in varied areas with its excellent properties. MCMB was generally produced by thermal-polymerization of high-temperature coal tar pitch under oxygen-free atmosphere. Generally, the content of primary quinoline insoluble (PQI) play a key role on the quality of the derived MCMB. In order to confirm the relationship between the content of PQI and the properties of MCMB, 15 kinds of high-temperature coal tar pitch with varied content of PQI were used as the raw materials to produce MCMB. The particle size distribution, optical micro-structure, surface morphology, and carbon micro-crystalline of calcinated MCMB were determined in this work. The results shown that the content of PQI from 7% to 13% was a suitable content to generate high quality MCMB. What is more, the derived MCMB has a high yield of 33.09% with good sphericity, the uniformity index of particle size was 1.02, and the graphite carbon content of calcinated MCMB (calcinated temperature of 1100°C) was 79.92%. Thus, the high-temperature coal tar pitch with the PQI content of 7%–13% was the preferably raw materials to produce high-quality MCMB by thermal-polymerization method.

中文翻译：

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高温煤焦油沥青合成中间相碳微珠：喹啉不溶物的影响

中间相碳微珠（MCMBs）是一种功能性人造碳材料，以其优异的性能被广泛应用于各个领域。MCMB一般由高温煤焦油沥青在无氧气氛下热聚合而成。一般来说，初级喹啉不溶物 (PQI) 的含量对衍生的 MCMB 的质量起着关键作用。为了确定PQI含量与MCMB性能之间的关系，以15种不同PQI含量的高温煤焦油沥青为原料生产MCMB。本工作测定了煅烧后的 MCMB 的粒度分布、光学微观结构、表面形貌和碳微晶。结果表明，7%~13%的PQI含量是生成高质量MCMB的适宜含量。所得MCMB收率高达33.09%，球形度好，粒径均匀指数为1.02，煅烧MCMB（煅烧温度1100℃）石墨碳含量为79.92%。因此，PQI含量为7%~13%的高温煤焦油沥青是热聚合法生产高品质MCMB的优选原料。