Institute 53 of China North Industries Group Corporation

Jinan, China

Institute 53 of China North Industries Group Corporation

Jinan, China

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Wang J.,Shandong University | Zhao G.-Q.,Shandong University | Wang G.-C.,Shandong University | Yuan J.,Institute 53 of China North Industries Group Corporation
Cailiao Gongcheng/Journal of Materials Engineering | Year: 2014

According to the numerical simulation model of the rolling process of powder sintered 93 tungsten alloy sheet and using the finite software DEFORM, the effect of roll convexity on head crack of the rolled sheet and the principal stress change in the crack point were analyzed. The results show that, with the increase of roll convexities, roll force and the rolled sheet width are on the rise, effective stress and effective strain change slightly, stress triaxiality and cracking tendency increase with the increasing of roll convexities absolute value, the selected range of roll convexities is -0.02-0.05 mm.


Tian L.,Nanjing University | Wang L.,Nanjing University | Zhang L.,Jiangsu University | Zhang Q.,Nanjing University | And 3 more authors.
Journal of Materials Science: Materials in Electronics | Year: 2015

Series samples of Dy3+/Bi3+ co-doped Gd3Al5O12 phosphors were successfully prepared by sol–gel combustion method. The phase composition, morphology and luminescence properties were investigated by X-ray diffraction, scanning electron microscope, photoluminescence, UV–Vis diffuse reflectance spectra, and fluorescent decay curves. Dy3+–Bi3+ co-doping had no significant effect on the host lattice of Gd3Al5O12 (GAG). The quenching concentration of Dy3+ in Gd3-xAl5O12:xDy3+ was determined to be 6.0 mol% (x = 0.06). At the optimal Dy3+ content of 6.0 mol%, the emission intensity of Dy3+ was greatly enhanced by Bi3+ co-doping. The incorporation of Bi3+ in GAG sample well improved the emission intensity of Dy3+ through the energy transfer from Bi3+ to Dy3+. The optimized composition was determined to be Gd2.895Al5O12:0.06Dy3+, 0.045Bi3+. The chromaticity coordinate shifted to green edge area after co-doping Bi3+ in GAG:Dy3+ phosphors. The enhanced intensity and tuned luminous color of Dy3+/Bi3+ co-doped GAG phosphors provided a promising application in white light emitting diodes (WLEDs), scintillation and some other optical fields. © 2015 Springer Science+Business Media New York


Sun Y.,Institute 53 of China North Industries Group Corporation | Wang D.,Institute 53 of China North Industries Group Corporation | Liu Y.,Institute 53 of China North Industries Group Corporation | Li H.,Institute 53 of China North Industries Group Corporation
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | Year: 2014

The natural aging of glass fiber reinforced bromide epoxy vinyl ester composites was investigated in Wanning and Lasa stations of Chinese typical climate regions. Its accelerated aging experiments including hydrothermal, hot air, light and hot water were studied in laboratory at the same time. The mechanical properties including tensile strength, flexural strength, and compressive strength of glass fiber reinforced bromide epoxy vinyl ester composites after aging were tested. By using the grey correlation analysis method, the relationship between the natural aging and accelerated aging was calculated. The results show that the accelerated light aging has the best correlation with the natural aging, whose correlation degree reaches to 0.75 when taking compressive strength as property indicator. Accelerated factor (AF) and accelerated switch factor (ASF) between natural aging and accelerated light aging are obtained. The ultimate ASF in Lasa and Wanning is 5.28 and 7.25, respectively.


Li Y.-L.,Institute 53 of China North Industries Group Corporation | Ji K.-J.,Institute 53 of China North Industries Group Corporation | Liu Y.-J.,Institute 53 of China North Industries Group Corporation | Gao D.,Institute 53 of China North Industries Group Corporation | And 2 more authors.
Hanneng Cailiao/Chinese Journal of Energetic Materials | Year: 2015

The components of four kinds of JP-10 aviation fuels were analyzed by gas chromatography/mass spectrometry (GC/MS). The linear scope of gas chromatography was researched. The purities of JP-10 fuels were measured with an external standard method. Results show that JP-10 aviation fuels contains not only the main component exo-tetrahydrobicyclopentadiene, but also decahydronaphthalene, endo-tetrahydrobicyclopentadiene, adamantane and their methylated products, etc. The suitable concentration range for external standard method to measure the purity of JP-10 is 0.5-20 mg·mL-1. This method is reliable, accurate, and can be used for determining the purity of JP-10. ©, 2015, Institute of Chemical Materials, China Academy of Engineering Physics. All right reserved.


Huang X.,Nanjing University of Information Science and Technology | Chen Y.,Nanjing University of Information Science and Technology | Yu J.,Nanjing University of Information Science and Technology | Zhang J.,Nanjing Center | And 3 more authors.
Journal of Materials Science: Materials in Electronics | Year: 2015

The Fe3O4 nanofibers were prepared by electrospinning method. The phase composition and morphology were analyzed by XRD and FE-SEM. The results indicated that the pure Fe3O4 nanofibers were obtained and exhibited evident shape anisotropy. The magnetic study via VSM showed that the Fe3O4 nanofibers possessed ferrimagnetic properties. The saturation magnetization was around 58.4 emu/g and the coercivity was approximate 186.7 Oe. In addition, the electromagnetic loss properties were detailed investigated by network analyzer. The dispersion relaxation phenomenon was observed in the frequency range of 2–18 GHz. The dielectric loss was caused by the interface polarization and the magnetic loss was owing to the exchange resonance. The as-prepared Fe3O4 nanofibers showed excellent electromagnetic loss properties and could be potentially applied as the lightweight microwave absorption materials. © 2015, Springer Science+Business Media New York.


Huang X.,Nanjing University of Information Science and Technology | Huang X.,Georgia Institute of Technology | Zhang J.,Nanjing Center | Liu Z.,Nanjing University of Information Science and Technology | And 4 more authors.
Journal of Alloys and Compounds | Year: 2015

Abstract The porous hollow BaFe12O19/CoFe2O4 microrods were prepared by an easy and reproducible in situ synthetic method. Cotton cellulose was used as the sacrificial bio-template. The as-prepared hard/soft ferrite composites were homogeneously distributed on the surface of the microrods. It was demonstrated that the porous hollow microrods-like structure and the exchange-coupled interaction between hard and soft ferrites were beneficial to improve the microwave absorption properties. The weight content of the hard/soft ferrite composites was low to 60 wt%, whereas reflection loss could reach to -10 dB in the frequency range of 8.2-16.3 GHz. The fabrication of porous hollow BaFe12O19/CoFe2O4 microrods was an efficient approach to solve the heavy mass problem of the conventional hard/soft ferrite matrix microwave absorption materials. © 2015 Elsevier B.V.


Wang J.,Shandong University | Zhao G.,Shandong University | Chen L.,Shandong University | Li J.,Institute 53 of China North Industries Group Corporation
Materials and Design | Year: 2016

The isothermal hot compression tests for powder metallurgy pure tungsten were carried out by using Gleeble 3800 thermo mechanical simulator at deformation temperatures from 1523K to 1823K and strain rates from 0.001s-1 to 1s-1. The deformation behavior of powder metallurgy pure tungsten at elevated temperature were studied, and six constitutive equations were respectively established based on Arrhenius model, Johnson-Cook model, modified Johnson-Cook model, Zerilli-Armstrong model, modified Zerilli-Armstrong model, and KHL model. Moreover, the predictability of the derived constitutive equations was evaluated by using the correlation coefficient (Rc) and average absolute relative error (AARE). The results show that flow stress of pure tungsten is affected not only by strain rate and deformation temperature, but also by strain. The flow stress of pure tungsten at elevated temperature could be well described by Arrhenius model, modified JC model, modified Zerilli-Armstrong model, and KHL model. The present study can provide some important and basic data for the simulation of plastic deformation processes of powder metallurgy pure tungsten. © 2015 Elsevier Ltd.


Huang X.,Nanjing University of Information Science and Technology | Huang X.,Georgia Institute of Technology | Zhang J.,Nanjing Center | Wang W.,Nanjing University of Information Science and Technology | And 5 more authors.
Journal of Magnetism and Magnetic Materials | Year: 2016

In this paper, the cobalt zinc ferrite was prepared by coprecipitation method at different pH conditions. The influence of pH values on the coprecipitation reaction was theoretically analyzed at first. The calculated results showed that the pH values should be controlled in the range of 9-11 to form the stable precipitation. The XRD investigation was used to further confirm the formation of the composite on specific pH values. In addition, the morphological study revealed that the average particle size of the composite decreased from 40 nm to 30 nm when the pH value increased from 9-11. The variation of microstructure plays a critical role in controlling the electromagnetic properties. From the electromagnetic analysis, the dielectric loss factor was 0.02-0.07 and magnetic loss factor was 0.2-0.5 for the composite synthesized at pH of 9, which presents dramatically improved dielectric loss and magnetic loss properties than the samples prepared at pH of 10 and 11. The as-prepared cobalt zinc ferrite are highly promising to be used as microwave absorption materials. © 2015 Elsevier B.V. All rights reserved.


Li Y.,Central South University | Li Y.,Institute 53 of China North Industries Group Corporation | Chen G.,Central South University | Li Q.,Central South University | And 2 more authors.
Journal of Alloys and Compounds | Year: 2011

Fe3O4/polypyrrole (PPy) core/shell nanocomposite, with Fe3O4 nanoparticle as core and PPy as shell, could be facilely synthesized via in situ chemical oxidative polymerization of pyrrole monomers on the surface of Fe3O4 nanoparticles. The results indicate that core/shell nanocomposite consists of Fe3O 4 core with the mean diameter of 100 nm and adjacent PPy shell with a thickness of about 70 nm. The as-prepared Fe3O4/PPy core/shell nanocomposite exhibits a saturated magnetization of 20.1 emu/g and coercivity value of 368.3 Oe, respectively. The electromagnetic characteristics of Fe3O4/PPy core/shell nanocomposite were also investigated with a vector network analyzer in the 2-18 GHz range. The absorbing peak position moves to lower frequency with increasing the thicknesses of samples. The value of the minimum reflection loss is -22.4 dB at 12.9 GHz for Fe3O4/PPy core/shell nanocomposite with a thickness of 2.3 mm, and a broad peak with a bandwidth lower than -10 dB is about 5 GHz. Such strong absorption is attributed to better electromagnetic matching due to the existence of PPy and the special core/shell structure. © 2011 Elsevier B.V. All rights reserved.


Zhang X.-Y.,Shandong University | Zhang Y.-J.,Shandong University | Gong H.-Y.,Shandong University | Wang C.-L.,Shandong University | And 4 more authors.
Gongneng Cailiao/Journal of Functional Materials | Year: 2013

Nano black high near-infrared (NIR) reflectance ceramic pigments were prepared with ferric nitrate, chromium nitrate, citric acid, and ethylene glycol by sol-gel method. The effects of different molar ratio of Fe and Cr, hydrolysis temperature, the pH of the solution, concentration of metal ions and calcination temperature were investigated. The results show that the crystalline phase of the as-prepared pigments is Cr1.3Fe0.7O3 with average NIR reflectance about 77.58% in 700-2500 nm wavelength range when Fe/Cr molar ratio was 0.50, hydrolysis temperature was 70°C, pH value was 3-4, metal ion concentration was 2.5-3.5 mol/L, calcination temperature was 900°C.

Loading Institute 53 of China North Industries Group Corporation collaborators
Loading Institute 53 of China North Industries Group Corporation collaborators