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Liu Z.G.,Qinhuangdao Vocational and Technical College
Applied Mechanics and Materials | Year: 2014

In order to investigate the structural evolution of natural flake graphite during intercalation and exfoliation, natural graphite flakes were treated by intercalating, water-washing, drying and expanding. The corresponding products, graphite intercalation compound (GIC), residue GIC (expandable graphite) and expanded graphite were characterized by X-ray diffraction (XRD). The results can provide reference for the research in this field. © (2014) Trans Tech Publications, Switzerland.


Li Y.,Qinhuangdao Vocational and Technical College
Advanced Materials Research | Year: 2012

A mixture of expanded graphite (EG) and boron was ball-milled in a high-energy mill. The microstructure of the milled EG/B powders was characterized by transmission electron microscopy (TEM). The tribological behavior of the milled powders used as lubricating additive was investigated by using a tribo-tester, and the morphology of the worn tribo-surfaces were observed by scanning electron microscope (SEM). The results show that the powders used as lubricating additive have an obvious anti-friction and wear resistance effect, and the lager the applied load, the lower the friction coefficient and the wear severity. © (2012) Trans Tech Publications, Switzerland.


Zhang H.,Qinhuangdao Vocational and Technical College
Advanced Materials Research | Year: 2013

Expanded graphite (EG) was ball-milled in a high-energy mill (planetary-type) under an air atmosphere. The products were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The anti-friction effect of milled EG used as lubricating additive was investigated. After ball-milling, the relatively ordered graphene planes of original EG become deformed, and the d002 spacing becomes broadened. The milled EG used as lubricating additive have an anti-friction effect, and the effect is more marked than that of original EG. © (2013) Trans Tech Publications, Switzerland.


Lu Y.,Qinhuangdao Vocational and Technical College
Advanced Materials Research | Year: 2012

Using three natural graphites with different particle size, 35, 50 and 80 mesh, as raw materials, expandable graphites were prepared by intercalating, water-washing and drying the natural graphites. The products were characterized by X-ray diffraction, Infrared spectroscopy, scanning electron microscope and Raman spectroscopy. Results show that the structure of expandable graphite is affected strongly by the particle size of natural graphite. With increasing the particle size of natural graphite, for expandable graphite, the expansion degree of graphite flakes along the c-axis and the relative ratio of intercalating agents increase, while the structural disorder increases. © (2012) Trans Tech Publications.


Li H.,Qinhuangdao Vocational and Technical College
Advanced Materials Research | Year: 2012

A mixture of expanded graphite and iron powders was ball-milled in a high-energy mill under an air atmosphere. The milled powders were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The anti-friction effect of the powders used as lubricating additive was investigated by a tribo-tester. Results show that the powders have an obvious anti-friction effect, and the effect is associated with the crystallization degree of the milled expanded graphite depending on the milling time, the higher the crystallization degree, the higher the anti-friction effect. © (2012) Trans Tech Publications, Switzerland.


Duan W.,Qinhuangdao Vocational and Technical College
Applied Mechanics and Materials | Year: 2011

Expanded graphite (EG) was ball-milled in a high-energy planetary-type mill under an air atmosphere. The X-ray diffraction patterns of the products show that during the milling process (up to 100 h), the out-of-plane (L c) and in-plane (L a) crystallite sizes decrease gradually from 15.4 to 11.3 nm and 24.1 to 15.5 nm, respectively. The value of L c/L a, which is used to estimate the shape of the crystallites, increases gradually from 0.64 to 0.73. Compared with most of natural graphite, this L c decrease degree of EG is far lower. This increased value of L c/L a indicates that the crystallites of the milled EG become thicker and steeper, which is contrary to the case for natural graphite. © (2011) Trans Tech Publications.


Li C.-X.,Qinhuangdao Vocational and Technical College
Proceedings - 2016 8th International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2016 | Year: 2016

In order to coordinate the balance relationship between coastal ecological tourism resource, tourism environment and the coastal tourism economic development, and realize harmonious development of ecological environment benefit and economic benefit, the evaluation index system of tourism environment quality is established based on analytic hierarchy process. At the same time, through classification and evaluation of coastal ecological tourism resource in Shandong province, protection development and countermeasures of ecological tourism resource is put forward. The proposed scheme has a certain practical guiding significance for the development of coastal ecological tourism industry. © 2016 IEEE.


Hua G.-M.,Qinhuangdao Vocational and Technical College
Proceedings - 2016 8th International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2016 | Year: 2016

This paper focuses on the model and algorithm for optimization of tourist routes. For the optimization problem of «multi-day tourism» it proposes a novel strategy based on heuristic algorithm. It adopts Monte Carlo improved simulated annealing algorithm, to provide optimized design of local tourist route in a certain area, with the object of shortest path and smallest cost. It also establishes the mathematical model of «multi-day» tourism route. By multiple experiments and computation, it is founded that the application of simulated annealing in tourism route design can effectively acquire the optimal solution or approximate optimal solution. Finally the tourist attractions of a certain city is taken as an example to verify the method proposed in this paper. © 2016 IEEE.


Bi C.,Qinhuangdao Vocational and Technical College
Advanced Materials Research | Year: 2012

Graphite encapsulated iron nanoparticles were prepared by ball-milling and subsequently annealing a mixture of expanded graphite and iron powders. The nanoparticles were characterized by transmission electron microscope (TEM) and X-ray diffraction (XRD). The formation mechanism of the nanoparticles was discussed. The results show that the nanoparticles have a size range of 20-150 nm, and graphite and iron in the nanoparticles have a higher crystallinity. © (2012) Trans Tech Publications, Switzerland.


Luan X.J.,Qinhuangdao Vocational and Technical College
Applied Mechanics and Materials | Year: 2014

This document explains and demonstrates the concept and characteristics of recycling logistics, probes into the present situation of abandoned objects recycling logistics in universities and colleges, analyzes and presents the corresponding development strategy. © (2014) Trans Tech Publications, Switzerland.

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