| Autor: |
Ji, Sheng Juan, Cheng, Xiang Lin, Zhao, Jian Hong, Bi, Qing Ling, Wang, Liu Cheng, Wang, Jian She, Wang, Lu Hai, Song, Cheng Ying, Zhang, Miao |
| Zdroj: |
Key Engineering Materials; August 2017, Vol. 753 Issue: 1 p231-236, 6p |
| Abstrakt: |
A synthetic naphthalene isotropic pitch, which was manufactured with HF/BF3 acting as catalyst, was used as material to prepare mesocarbon microbeads (MCMB) through suspension method. The material pitch was dissolved in tetrahydrofuran (THF) and the pitch-THF solution is dispersed in a 2% polyvinyl alcohol aqueous solution. After THF was volatilized, the solution was cooled and then filtered to attain little pitch sphere. The pitch spheres were oxidized in 65% HNO3 solution, and the oxidized pitch spheres were carbonized up to 1000°C to get MCMB. MCMB was analyzed by scanning electron microscope (SEM), laser particle size analyzer and X ray diffractometer. The result showed that the particle size of MCMB was 2-30 μm and the average particle diameter size of D50 was 15.83 μm. The particle size distribution accords to the normal distribution, and the particle size dispersion degree was 0.7574. The effect of 65% HNO3 oxidation of the pitch sphere showed a satisfactory result. After carbonization at 1000°C, the oxidized pitch sphere exhibited a better orientation arrangement, the distance between the aromatic plane (d002) was decreased, and the thickness of the piled plane is increased. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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