Ping An Liu

South China University of Technology, Shengcheng, Guangdong, China

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Publications (10)0.97 Total impact

  • No preview · Article · Dec 2014
  • Xiao Su Cheng · Zhi Li · Hui Wang · Ping An Liu · An Ze Shui · Ling Ke Zeng
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    ABSTRACT: The humidity controlling materials using diatomite as the major raw material were prepared by dry pressing molding process. Effects of various diatomite contents and sintering temperatures on the final products were investigated. The samples were also characterized by X-ray diffraction (XRD), scanning electronic microscope (SEM), and then tested adsorption-desorption performances by temperature and humidity chamber. The results indicate that the equilibrium moisture adsorption reaches to 338 g/m2 when diatomite content is fixed at ∼70% and sintering temperature is holding at 1050°C, respectively.
    No preview · Article · Nov 2014
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    ABSTRACT: A new synthesis technology of titanium carbide with microwave is introduced in this article. Microwave synthesis technology is a fast and relatively low temperature of synthesis method. Nano-titanium carbide powders were synthesized by carbothermal reduction of titanium dioxide and carbon black with the microwave synthesis method at 1100°C-1400°C in argon gas atmosphere. Nano-TiO2 powder and carbon black were used as raw materials. The TiC powders were characterized with the XRD and TEM. The experimental results show that the synthesis rate is quick, even at relatively low synthesis temperature. The average particle size of the TiC powders synthesized by the microwave synthesis technology under low temperature (
    No preview · Article · Nov 2011
  • Zhi Jie Zhang · Hong Ke Li · Ping An Liu
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    ABSTRACT: The influences of phenolic resin on the properties of both Magnesium oxychloride cement (MOC) pastes and MOC abrasive tools were investigated in this study. By incorporating phenolic resin in the MOC pastes,With 5% phenolic resin ,the compressive strength of MOC paste decreased by 26% , the flexural strength of MOC pastes decreased by 21%, the abrasion loss of MOC abrasive tools decreased by 37%, the strength softening coefficient greatly increased. The mechanism maybe due to the microstructure of the MOC pastes became more compact with phenolic resin adding, the rate of hydrolyzation reaction of MOC phases would be postponed.
    No preview · Article · Nov 2011
  • Ping An Liu · Xiao Heng Shi
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    ABSTRACT: By using the theory and method of topology structure design of parallel robotic mechanisms, the degrees of freedom (DOF) is analyzed based on 4-DOF(3T1R) asymmetric parallel robots in this paper. Then, the inverse and forward kinematics of the manipulator are calculated through establishment of constrained equations with analytical approach.
    No preview · Article · Aug 2011
  • Xiaoling Qi · Lingke Zeng · Hui Wang · Ping’an Liu · Yanchun Liu
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    ABSTRACT: Ca3Co4O9 ceramics were prepared using the sol-gel process with ordinary pressing sintering and their thermoelectric properties were measured from room temperature to 673 K. The experimental results show that single phase Ca3Co4O9 can be fabricated at 750–900 °C in different citrate acid molar proportions for 0.2–1.0. For all the oxides, both the Seebeck coefficients S and the electrical conductivities κ increase with the increasing temperature. The Seebeck coefficients S are all positive. The thermal conductivities k increase with the increasing temperature also and the lattice thermal conductivity κ l plays an important role to the thermal conductivity κ. The citrate acid molar proportions have a large influence on the particle sizes, which influences the thermoelectric properties of the ceramics. The figure of merit increases with the increasing temperature and reaches 4.5×10−5 K−1 at 573 K for the sample in the citrate acid molar proportion of 0.46.
    No preview · Article · Apr 2010 · Journal of Wuhan University of Technology-Mater Sci Ed
  • An Ze Shui · Ling Ke Zeng · Ping An Liu · Xiao Su Cheng · Hui Wang
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    ABSTRACT: A new control method of the particle orientation structure with super high magnetic field is studied for Al2O3 ceramics. Al2O3 slurry was made with two types of Al2O3 particles, which one was spherical shape of, and the other one was elongated shape of. The Al2O3 ceramics of orientation structure was fabricated by drying the Al2O3 slurry under the super high magnetic field, cold isostatic pressing (CIP) and sintering. Effects of particle shape, particle size, the solid loading, slurry viscosity, dispersant content and the magnetic field strength on the particle orientation structure were examined in detail. The experimental results indicate that even the spherical Al2O3 particles can align under the magnetic field; the particle orientation degree changes with the particle shape and the solid loading under same magnetic field strength conditions, and the elongated particle system is easier to align than the spherical particle system; the particle orientation degree of the Al2O3 ceramics can be controlled by adjusting the particle shape, particle size, solid loading, slurry viscosity, dispersant content and magnetic field strength.
    No preview · Article · Jan 2008 · Key Engineering Materials
  • Xue Tan Ren · Ling Ke Zeng · Ping An Liu · Hui Wang
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    ABSTRACT: The K2SO4-Na2SO4 system was studied by differential scanning calorimetry (DSC) with the aim of developing a new phase-change thermal energy storage material. The temperature range of phase change is from 800°C to 1069°C according to the phase diagram. A new shape-stabilized phase-change material made of molten salts impregnated by capillary forces in a porous-fiber matrix was presented. These materials were characterized by X-ray diffraction analysis and differential scanning calorimetry analysis. The results indicated that the compound included 70-80% of molten salts, meanwhile the heat storage material could keep its shape without any leakage during the heating process.
    No preview · Article · Jan 2008 · Key Engineering Materials
  • Lingke Zeng · Yanchun Liu · Bilin Duan · Ping’an Liu · Hui Wang · Anze Shui
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    ABSTRACT: The perovskite-type La0.8Sr0.2CoO3 supported on the mullite fiber porous ceramics was prepared by means of the impregnating method, and was then characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD); thus we can come to the conclusion that the perovskitetype composite oxidant can disperse on the surface of mullite fiber ceramics. The catalytic activity of the La0.8Sr0.2CoO3 for NO and CO was evaluated. The effect of the doped 0.1 wt-% PdCl2 on the catalytic activity of the perovskite-type La0.8Sr0.2CoO3 was also discussed. The results show that the conversion rates of NO and CO respectively reaches 74.5% and 99% at 601�C without doped Pd, and both reach 100% at 350�C with a little doped Pd.
    No preview · Article · Oct 2007 · Frontiers of Chemical Engineering in China
  • Xiu Yan Li · Ling Ke Zeng · Ping An Liu · Hui Wang · An Ze Shui
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    ABSTRACT: The photocatalyst of nanometer ZnO powder was prepared by precipitation method with ZnSO4·7H2O and Na2CO 3 as raw materials. Laboratory experiments with methyl orange (MO) as the model pollutant have been carried out to evaluate the photocatalytic activity of nanometer ZnO photocatalyst. A high-pressure mercury lamp was used as the energy source for the photocatalytic experiments. The effects of process parameters such as catalyst loading, initial methyl orange concentration, pH and electrolyte on the photodegradation have been investigated.
    No preview · Article · Jan 2007 · Key Engineering Materials