High modulus pitch based carbon fibers (HM) were exposed to isothermal oxidation using tube furnace in ... High modulus pitch based carbon fibers (HM) were exposed to isothermal oxidation using tube furnace in
Petroleum pitch-based activated carbons (ACs) were obtained in this work from a combination of pretreatment ... The surface characteristics of the pitch after the KMnO4 pretreatment were characterized by means of ... The structural characteristics of the pitch after the KMnO4 pretreatment were determined by means of
isotropic pitch precursor and the precursor was melt-spun into pitch fibers, stabilized, carbonized ... Coal tar pitch was chemically modified with 10 wt% benzoquinone (BQ) to raise the softening point of
·Pitch accent·Pitch pattern 한국청각언어재활학회 청능재활 Jaehwan Hyun, Dukhwan Lim ... ·Pitch accent·Pitch pattern This study aimed to analyze the effects of noise with various signal to noise ... aimed to analyze the effects of noise with various signal to noise ratios on suprasegmental features (pitch
MCMB(mesocarbon microbeads) has been synthesized from coal tar pitch, petroleum
pitch and polymer ... As the result, yield of MCMB that was synthesized from coal
tar pitch increased more than 60wt% about ... particle size of MCMB was
restrained according to control of QI(quinoline insoluble) ingredient in raw pitch
MCMB(mesocarbon microbeads) has been synthesized from coal tar pitch, petroleum pitch and
polymer ... As the result, yield of
MCMB that was synthesized from coal tar pitch increased more than 60wt% about ... particle size of MCMB was restrained according to control of QI(quinoline insoluble)
ingredient in raw pitch
Petroleum pitch-based activated carbons (ACs) were obtained in this work from a combinationof pretreatment ... The surface characteristics of the pitch afterthe KMnO4 pretreatment were characterized by means of Fourier ... The structural characteristics of the pitch after the KMnO4 pretreatmentwere determined by means of X-ray
Pitch is an attractive raw material for carbon fiberprecursors due to its low cost stemming from its ... Petroleum pitch based carbon nanofibersprepared via electros-pinning were characterized and potential
Coal tar pitch was chmically modified 10wt% benzoquinone(BQ) to raise the softening point of isotropic ... pitch pre-cursor and the precursor was melt-spun into fibers, stabilizd, carbonized and activated with ... Coal tar pitch was chmically modified 10wt% benzoquinone(BQ) to raise the softening point of isotropic
Petroleum based isotropic pitch was spun into short fiber by melt-blown spinning technology. ... The processing parameters chosen were air velocity, die temperature, and throughput rate of the pitch ... Also, the fiber diameter was strongly dependent on the throughput rate of the pitch and jet speed of
Raman spectroscopy has been used to investigate the structure of coal tar pitch heat-treated up to 3000 ... Four critical temperature ranges were found on pyrolyzing coal tar pitch, which correspond to four distinct ... heat treat temperature (HTT) below 1000℃ corresponds to gas evolution during the pyrolysis of coal tar pitch
Pitch is an attractive raw material for carbon fiber precursors due to its low cost stemming from its ... Petroleum pitch based carbon nanofibers prepared via electrospinning were characterized and potential ... Pitch is an attractive raw material for carbon fiber precursors due to its low cost stemming from its
Since the carbon layers derived from pitch on the TiO₂particles wereporous, the carbon/TiO₂composite ... The BET surface area for the carbon layer in the sample increases to increasing with pitch contents. ... Since the carbon layers derived from pitch on the TiO₂particles wereporous, the carbon/TiO₂composite
탄소는 상온부근에서 화화적으로 안정된 원소로 기계 및 화학공업 분야에서 용도가 다양하다. 물리적인 특성으로 탄소는 금속적 성질과 세라믹 성질을 동시에 지니고 있으며, 흑연 결정 성장 정도에 따라 분류되고 그 성장속도가 클수록 금속적 성질을 지니게 된다. 이와같이 어느 ..
Isotropic pitch fibers were stabilized and carbonized for preparing carbon fibers. ... structure of the carbon fibers, indicating the limit of developing an ordered structure of isotropic pitch-based
To manufacture a carbon/carbon composite the coal tar pitch was used as the matrix precursor and the ... an ideal temperature for the moderate growth of the mesophase nucleus that forms within the molten pitch