X-Ray Diffraction Methods

Dubal, Deepak P.; Holze, Rudolf

doi:10.1007/978-1-4419-6996-5_244

Cited by 4 publications

(7 citation statements)

References 33 publications

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“…The carbon fibers sampled were scanned along the fiber axis (equatorial scanning). The interlayer spacing of (002) lattice planes in the microcrystals of the carbon fiber was determined using the Bragg equation where θ 002 is the scattering angle of the (002) peak and λ is the wavelength of the X-ray.…”

Section: Methodsmentioning

confidence: 99%

“…The size of the microcrystal L c and the dimension of the graphite-like layer L a were calculated using the Scherrer equation where K is the shape factor and β 002 and β 10 are the full widths of the (002) and (10) peaks at their half maximum, respectively. Following the work of Barton et al, K was set to 0.9 and 1.84 for the determination of L c and L a , respectively.…”

Section: Methodsmentioning

confidence: 99%

“…where θ 002 is the scattering angle of the (002) peak and λ is the wavelength of the X-ray. The size of the microcrystal L c and the dimension of the graphitelike layer L a were calculated using the Scherrer equation 25…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

See 2 more Smart Citations

Accelerated Graphitization of PAN-Based Carbon Fibers: K⁺-Effected Graphitization via Laser Irradiation

Zhang

Song

Cheng

et al. 2022

ACS Sustainable Chem. Eng.

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Graphitization progress of polyacrylonitrile (PAN)based carbon fibers is closely dependent on the treatment temperature; exactly, controlling the microstructural morphology of carbon layers in the fibrous solid state can accelerate the formation of a highly graphitic structure. The present work exhibited the accelerated graphitization of PAN-based carbon fibers by the effect of K + on microstructure evolution under laser irradiation. Chemical and microstructure characterization reveals that a much higher degree of graphitization is achieved via the K + effect after the laser irradiation than by pure laser treatment at the same low temperature of about 2000 °C. Ordered and large-sized graphite-like microcrystals can be formed as well. The reactive molecular simulation further provided insights into the acceleration mechanism of the K + effect during the graphitization progress. Thus, based on these results, K + -effected graphitization via laser irradiation can be a promising alternative for the efficient and eco-friendly mass production of graphite fibers.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Accelerated Graphitization of PAN-Based Carbon Fibers: K⁺-Effected Graphitization via Laser Irradiation

Zhang

Song

Cheng

et al. 2022

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…The interlayer spacing of (002) planes and the interlayer spacing of (10) in the microcrystal of the carbon fiber were calculated using the Bragg equation where θ 002 is the scattering angle of peak (002), θ 10 is the scattering angle of peak (10), and λ is the wavelength of X-ray (λ = 0.154178 nm).…”

Section: Experimental Sectionmentioning

confidence: 99%

“…The size of the microcrystal L c and the dimension parallel to the graphitelike lamellae L a were calculated using the Scherrer equation where K is the shape factor and β 002 and β 10 are the full widths of (002) and (10) peaks at their half maximum, respectively. Following the work of Barton et al, K was set to 0.9 and 1.84 for the calculation of L c and L a , respectively.…”

Section: Experimental Sectionmentioning

confidence: 99%

Carbon Fibers with High Electrical Conductivity: Laser Irradiation of Mesophase Pitch Filaments Obtains High Graphitization Degree

Zhang

Yang

Cheng

et al. 2020

ACS Sustainable Chem. Eng.

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Carbon fibers have promising applications in the efficient transmission of electric power with less resource consumption. Laser graphitization of the mesophase pitch-based carbon fiber (MPCF) was proposed to improve the electrical conductivity of the carbon fiber. The obtained MPCF showed a high conductivity of 7.04 × 105 S/m. The graphitization degree of carbon fiber increased and the interlayer spacing of its graphite crystal decreased on increasing the laser intensity. With a laser power of 360 W and an irradiation period of 25 s, corresponding to a temperature of 3001 °C, a high graphitization degree (R = 0.02) was obtained and the interlayer spacing was as small as 0.338 nm, close to that of pure graphitic carbon (0.335 nm). The enhanced electrical conductivity is attributed to the improved homogeneity of graphitization along the axial and radial directions, the ordered structural evolution, ordered stacking of the graphitic layer, and the promoted connectivity between the graphitic crystals in the carbon fiber. The energy consumption of the proposed method is estimated to be only 0.46% of that with the conventional Joule heating approach. This work suggests that laser-induced graphitization is a good alternative to prepare carbon fibers with high electrical conductivity and reduced energy consumption.

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Evaluating the potential of treated municipal wastewater reuse in irrigation and groundwater recharge; 5-year contaminant transport modeling

Amiri,

Nakhaei

2023

Int. J. Environ. Sci. Technol.

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X-Ray Diffraction Methods

Cited by 4 publications

References 33 publications

Accelerated Graphitization of PAN-Based Carbon Fibers: K⁺-Effected Graphitization via Laser Irradiation

Accelerated Graphitization of PAN-Based Carbon Fibers: K⁺-Effected Graphitization via Laser Irradiation

Carbon Fibers with High Electrical Conductivity: Laser Irradiation of Mesophase Pitch Filaments Obtains High Graphitization Degree

Evaluating the potential of treated municipal wastewater reuse in irrigation and groundwater recharge; 5-year contaminant transport modeling

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X-Ray Diffraction Methods

Cited by 4 publications

References 33 publications

Accelerated Graphitization of PAN-Based Carbon Fibers: K+-Effected Graphitization via Laser Irradiation

Accelerated Graphitization of PAN-Based Carbon Fibers: K+-Effected Graphitization via Laser Irradiation

Carbon Fibers with High Electrical Conductivity: Laser Irradiation of Mesophase Pitch Filaments Obtains High Graphitization Degree

Evaluating the potential of treated municipal wastewater reuse in irrigation and groundwater recharge; 5-year contaminant transport modeling

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Product

Resources

About

Accelerated Graphitization of PAN-Based Carbon Fibers: K⁺-Effected Graphitization via Laser Irradiation

Accelerated Graphitization of PAN-Based Carbon Fibers: K⁺-Effected Graphitization via Laser Irradiation