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Changan Wang - One of the best experts on this subject based on the ideXlab platform.

  • effects of Sintering Temperature on properties of porous mullite corundum ceramics
    Materials Letters, 2012
    Co-Authors: Fengkun Yang, Yamei Lin, Changan Wang
    Abstract:

    Abstract In this paper, porous mullite/corundum ceramics with high porosity, high strength and low thermal conductivity were fabricated by foam-gelcasting method using fused mullite powder as raw material. Effects of Sintering Temperature on linear shrinkage, bulk density, apparent porosity, compressive strength and thermal conductivity of the porous mullite/corundum ceramics were researched. As Sintering Temperature increased from 1350 to 1550 °C, linear shrinkage increased from 2.6 to 9.5%, porosity decreased from 81 to 78%, bulk density increased from 0.59 to 0.69 g/cm 3 , compressive strength increased from 3.1 to 11.7 MPa and thermal conductivity increased from 0.14 to 0.35 W/m·K. Porous microstructure was complex, where large spherical pores contained small cellular pores on their internal walls.

  • effect of Sintering Temperature on compressive strength of porous yttria stabilized zirconia ceramics
    Ceramics International, 2010
    Co-Authors: Liangfa Hu, Changan Wang
    Abstract:

    Abstract Porous yttria-stabilized zirconia (YSZ) ceramics were fabricated by tert-butyl alcohol (TBA)-based gel-casting method for potential applications in heat-insulation materials. The effect of Sintering Temperature on compressive strength of porous YSZ ceramics was investigated on the basis of measurements linear shrinkage, porosity and pore size. As the Sintering Temperature increased from 1350 to 1550 °C, a decrease of porosity from 77 to 65%, a decrease of average pore size from and an increase of linear shrinkage from 15.4 to 31.8% were observed. The compressive strength increased remarkably from 3 to 27 MPa with increasing Sintering Temperature from 1350 to 1550 °C, which was related to the corresponding change of linear shrinkage, porosity, pore size and microstructure. A remarkable decrease of compressive strength with increasing porosity was observed. The compressive strength decreased also with increasing pore size.

Tseungyuen Tseng - One of the best experts on this subject based on the ideXlab platform.

  • influence of Sintering Temperature on electrical properties of zno varistors
    Journal of Applied Physics, 1993
    Co-Authors: Tseungyuen Tseng
    Abstract:

    The electrical properties of the ZnO varistors are demonstrated in this present study to be affected by the Sintering Temperature. The variation of the non‐ohmic behavior with Sintering Temperature is indicated from I‐V and C‐V measurements to be a result of the changes of the interface defect density at the grain boundaries and the donor concentration in the ZnO grains. A shallow Schottky barrier is formed as a result of a low interface defect density, which is caused by losing the liquid‐phase sintered materials, such as Bi2O3, when the metal oxide additives along the grain boundaries are sintered at a high Temperature. The dielectric characteristic of the ZnO varistors is also affected by the Sintering Temperature. From the dielectric loss analysis and the complex‐plane analysis it is found that there are two intrinsic defects, V0. and Zni.., within the ZnO varistors. The natures of these defects as a function of Sintering Temperature are also mentioned.

Qianbing Wan - One of the best experts on this subject based on the ideXlab platform.

  • effects of Sintering Temperature and particle size on the translucency of zirconium dioxide dental ceramic
    Journal of Materials Science: Materials in Medicine, 2011
    Co-Authors: Li Jiang, Yunmao Liao, Qianbing Wan
    Abstract:

    The aim of this study was to evaluate the effects of Sintering Temperature and particle size on the translucency of yttrium stabilized tetragonal zirconia polycrystals (Y-TZP) dental ceramic. Eighty disc-shaped and cylindrical specimens were fabricated from zirconia powers of particle size 40 and 90 nm. These specimens were sintered densely at the final Sintering Temperature 1350, 1400, 1450 and 1500°C, respectively. The visible light transmittance, sintered density and microstructure of the sintered block were examined. The results showed that the sintered densities and transmittances increased with the Temperature from 1,350 to 1,500°C. Y-TZP could gain nearly full density and about 17–18% transmittance at the final Sintering Temperature of 1,450–1,500°C. The 40-nm powders had higher sintered density and transmittance than the 90-nm. The translucency of Y-TZP dental ceramic could be improved by controlling the final Sintering Temperature and primary particle size.

Xin-lin Wang - One of the best experts on this subject based on the ideXlab platform.

  • Influence of spark plasma Sintering Temperature on electrochemical performance of La0.80Mg0.20Ni3.75 alloy
    Materials Chemistry and Physics, 2008
    Co-Authors: Xiao-ping Dong, Liying Yang, Yanghuan Zhang, Xin-lin Wang
    Abstract:

    Abstract Spark plasma Sintering was employed to synthesize La0.80Mg0.20Ni3.75 alloy, using LaNi3, Mg and carbonyl Ni powders as starting materials. The effects of Sintering Temperature on crystal structure and electrochemical performance of the alloy were investigated in detail. The results by XRD show that the alloys have a multiphase structure, mainly including the (La, Mg)2Ni7, LaNi5 and Ni phases. The relative amount of the (La, Mg)2Ni7 and LaNi5 phases correlates to the Sintering Temperature. The cell volumes of the (La, Mg)2Ni7 and LaNi5 phases first increase and then decrease with increasing Sintering Temperature. This effect is more pronounced in (La, Mg)2Ni7 than LaNi5. Some electrochemical properties and kinetic parameters of the alloys, involving discharge capacity, medium voltage, high-rate dischargeability (HRD), the loss angle (ψ) and the limiting current density (IL), get enhanced with increasing Sintering Temperature. The capacity retention rates (S150) of the alloy electrodes first increase and then decrease with the rise of Sintering Temperature after 150 charging/discharging cycles. For balancing discharge capacity and cycle stability, the most suitable Sintering Temperature for synthesis of La0.80Mg0.20Ni3.75 by SPS is recommended to be 1173 K in the present work.

Shinsuke Yamanaka - One of the best experts on this subject based on the ideXlab platform.

  • Effect of Sintering Temperature on the thermoelectric properties of NaxCo2O4
    Journal of Alloys and Compounds, 2005
    Co-Authors: Tosawat Seetawan, Vittaya Amornkitbamrung, Thanusit Burinprakhon, Santi Maensiri, Prasit Tongbai, Ken Kurosaki, Hiroaki Muta, Masayoshi Uno, Shinsuke Yamanaka
    Abstract:

    Abstract Polycrystalline samples of NaxCo2O4 were synthesized by a conventional solid-state reaction (SSR) method by Sintering at various Temperatures in the range 1173–1293 K. The thermoelectric properties of the obtained samples, the electrical resistivity, Seebeck coefficient and thermal conductivity, increase with increasing Sintering Temperature. The dimensionless figure of merit decreased with increasing Sintering Temperature, and the sample sintered at 1173 K has the maximum value, ZT ∼ 0.11 at 973 K.