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Synthesis and Properties of Diphenylquinoxaline as Electron-transporting materials LI Tingxi a, SUI Peng b, GAO Susu, KONG Na, WU Shasha, LI Shanting and NIU Zhanrui School of Materials Science and Engineering, Shandong Univesity of Scinece & Technology, Qingdao 266510, China alitx@sdust.edu.cn, bsuipeng412@163.com Key words: organic electroluminescent materi; electron-transporting materials; amide acylation reaction; bis-(2,3-diphenylquinoxaline); device.
The organic electroluminescent core materials include luminescence materials, hole-transporting materials and electron-transporting materials.
The sdudy of luminescence materials and hole-transporting materials has made great progress, but electron-transporting materials relatively lags.
As electron-transporting materials, it is widely used in organic electroluminescent devices.
Holmes: Nature Vol. (1990), p. 347 [4] Wang Xin, Shen Juan and Xu Hongyao: Journal of Functional Materials Vol. 39(2008), p.1555 [5] Zhang Xiaobing, Zhang Zimin, Zhang Yugui and Li Min: Chinese Journal of Organic Chemistry Vol. 29(2009), p.297 [6] Peng Zhang, Benchen Tang, Wenjing Tian, Bing Yang and Min Li: Mater.

A study on chip breakage in mini-pore vibration drilling for hard-to-cut material of austenitic stainless steel J.S.
Lai1,2,c 1 School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, 510640, China 2 College of Mechatronic Engineering, Guangdong Institute of Science and Technology, Guangzhou, 510641, China awdcyyx999@163.com, bbyye@scut.edu.cn, c melaixy@163.com Keywords: mini-pore, vibration drilling, chip breakage, hard-to-cut material, Austenitic Stainless Steel Abstract.
Acknowledgment This project is supported by the Natural Science foundation of Guangdong Province (No.06025546).
Wei: Machining accuracy analysis for step multi-element varying-parameter vibration drilling of laminated composite materials, International Journal of Advanced Manufacturing Technology, Vol. 21(2003) No.10-11, p. 760-768
Lee: Using workpiece vibration cutting for micro-drilling, International Journal of Advanced Manufacturing Technology, Vol. 27(2006) No.7-8, p. 688-692

Pore distribution was regular three-dimensional geometric figure when D≤3, but when D>3, pore distribution of materials have been rather complicated and irregular, three-dimensional figure of Euclidean geometry can't be used to characterize spatial distribution, we can only use D [7]. 3 Materials and test method 3.1 Materials 42.5 moderate heat Portland cement produced by Gezhouba cement mill in Guizhou, that specific surface area was 317m2/kg, chemical and mineral composition of cement clinker were shown in Table 1.
The fractal description of pore structure of porous CaO[J], Journal of Huazhong University of Science and Technology, 29(3)：82～ 84(2001); [3] Jiang Dong, Wang Jianhua, Zheng Shishu.
Study on composition、structure and properties of cement and concrete with steel-making slag powder mineral additive[D], China Building Materials Research Institute,6:111(2003); [7] Yu Lehua,Ou Hui, Duan Qingpu.
Research on pore volume fractal dimension and its relation to pore structure and strength in cement paste with perlite admixture[J], Journal of Materials Science and Engineering, (2) (2007); [8] A.Carpinteri.
Fractal nature of material microstructure and size effects on apparent mechanical properties[J], Mechanics of Materials,(18):89～101(1994).

Mechanics of Materials [J], 2019, 129, pp.361-374
Computational Materials Science [J], 2014, 85, pp.102-120
International Journal of Mechanical Sciences [J], 2020, 173, pp.105422
International Journal of Mechanical Sciences [J], 2015, 101-102, pp.252-271
International Journal of Mechanical Sciences [J], 2021, p.106891

SC electrode materials mainly include carbon materials, conductive polymers, metal oxide/hydroxide, [6] etc.
Journal of Materials Chemistry A, 7, PP: 16028-16045, 2019. https://doi.org/10.1039/C9TA04436A [2] Wang G, Zhang L, Zhang J.
Journal of Materials Science and Chemical Engineering, 8, PP: 35-43, 2020. https://doi.org/10.4236/msce.2020.81004 [9] Lu Z, Xu W, Zhu W, Yang Q, Lei X, Liu J, Li Y, Sun X, Duan X.
Journal of Materials Chemistry, 20, PP: 7135-7143, 2010. https://doi.org/10.1039/C0JM00744G [12] Chiu K L, Lin L Y.
Journal of Materials Chemistry A, 7, PP: 4626-4639, 2019. https://doi.org/10.1039/c8ta11471d [13] Huang G, Zhang W, Xu S, Li Y, Yang Y.

Carbini, An experimental study of the dissemination of Titanium and Zirconium in body, Journal of materials science: Materials in medicine, 13 (2002) 793-796
Kim, Correlation between microstructure and corrosion behavior of Zr–Nb binary alloy, Journal of Nuclear Materials, 302 (2002) 9-19
Alexandrov, Bulk nanostructured materials from severe plastic deformation, Progress in Materials Science, 45-2 (2000) 103-189
Zhu, Long-length Ultrafine-grained Titanium Rods produced by ECAP-Conform, Materials Science Forum, 584-586 (2008) 80-85
Langdon, Principles of equal-channel angular pressing as a processing tool for grain refinement, Progress in Materials Science, 51 (2006) 881–981

For example, it fails to detect microcracks generated inside the materials before visible or audible failure.
Materials and Methods Four different bone cement materials were synthesized for mechanical evaluation and labeled according to the type of monomer used and the concentration as displayed in table 1.
Prendergast: International Journal of Fatigue, Vol. 22, (2000), p. 855–864
Sinclair: Journal of Biomedical Materials Research Part A, (2008), p. 1088-1097
Mann: Journal of Materials Science: Materials in Medicine, Vol. 21, (2010), p. 2915–2922

Reflections on Technology Transfer Between University’s Schools of Engineering and Sciences and Industry in Nigeria A.I.
▪Lack of utilization of local raw materials and inappropriate government policies have resulted in making Nigerian industries to be import dependent.
On the contrary, the driving force for academics is towards publishing basic research findings in journals which is necessary for their academic career.
▪Multinational companies should be encouraged to establish research and development facilities locally and source for local raw materials for their production process.
Implications for organization Science, Vol.1, pp. 47-81

The Rationalization of Production of Ring-Shaped Drop Forgings using Computer Simulation of Closed-Die Forging Process Mária Kapustová Slovak University of Technology in Bratislava, Faculty of Material Science and Technology in Trnava, Institute of Production Technologies, Slovak Republic maria.kapustova@stuba.sk Keywords: closed-die forging, flash, ring-shaped drop forging, computer simulation, material flow.
Bohnsak: Closed die technologies for hot forging, in: Journal of Materials Processing Technology, Vol. 98 (2000) 165-170
Kuhlmann: Guidelines for precision hot forging with applications, in: Journal of Materials Processing Technology, Vol.98 (2000) 182-188
Jou: Application of numerical simulation for wear analysis of warm forging die, in: Journal of Material Processing Technology, Vol.140 (2003) 43-48
Brooks: Friction during precision forging of high temperature aerospace materials, in: Materials Science and Technology, 28 (5) (2012) 528-531.

Synthesis and Application of Electronic Transporting Materials Li Tingxi a, Gao Susu b, Sui Peng, Kong Na, Wu Shasha, Li Shanting School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266510, China alitx@sdust.edu.cn, bsusugao@126.com Key words: organic EL, pyridine-containing compounds, energy-saving, environmental protection, electronic transporting material.
A number of emission materials and hole-transporting materials were reported.
In contrast, materials for electron-transporting materials are few.
ET Materials No.
Journal of Materials Science and Technology. 2008; 24:753-756.