The Experts below are selected from a list of 48 Experts worldwide ranked by ideXlab platform

Gao Chunhua - One of the best experts on this subject based on the ideXlab platform.

  • effect of y2o3 and dy2o3 on dielectric properties of ba0 7 sr0 3 tio3 series Capacitor Ceramics
    Journal of Rare Earths, 2007
    Co-Authors: Zhao Chen, Huang Xinyou, Guan Hao, Gao Chunhua
    Abstract:

    Abstract The effects of rare earth oxide (Y2O3 and Dy2O3) on the microstructure and dielectric properties of Ba0.7Sr0.3 TiO3(BST) series Capacitor Ceramics were studied, and the low of the influence of Y2O3 and Dy2O3 doping amount on the BST series Capacitor Ceramics was obtained. The strong correlation was observed between the dopant concentration and materials properties. It was also found out that different rare earth oxides and amount had different influences on BST. The experimental results showed that the dysprosium oxide (Dy2O3) could restrain abnormal grain growth during the sintering process and fining grain, the yttrium oxide(Y2O3) could decrease dielectric loss, and the permittivity could be increased by more than 40% compared with nominally undoped BST Ceramics. The BST Ceramics with optimum comprehensive properties was obtained, having high dielectric constant (ɛ = 3658), low dielectric loss (tanδ = 0.0093) and low dielectric constant temperature changing rate absolute value((Δɛ/ɛ) = 14.1%) while w(Dy2O3) = 1.00%.

  • study on dy2o3 doped medium temperature sintering ba sr tio3 series Capacitor Ceramics
    Journal of Rare Earths, 2007
    Co-Authors: Huang Xinyou, Zhao Chen, Chen Zhigang, Gao Chunhua, Chen Xiangchong, Guan Hao
    Abstract:

    Abstract The influence of Dy 2 O 3 doping on the properties of medium temperature sintering (Ba, Sr)TiO 3 series Capacitor Ceramics was studied by single factor various amount method, and the law of the influence on the medium temperature sintering (Ba, Sr)TiO 3 series Capacitor Ceramics was obtained. The dielectric materials used for multilayer ceramic Capacitor was obtained, of which the dielectric constant was 1375, the dielectric loss was 0.0060, the density was 5.92 g·cm −3 , the sintering temperature was less than 1150 °C, the capacitance temperature changing rate (Δ C/C ) was less than ± 15%, the voltage withstand strength was more than 9.3 kV·mm −1 , and the crystal grain size was about 1 μm. The surface morphology of the sample doped with various amount Dy 2 O 3 was analyzed by scanning electron microscope (SEM). The results showed that doping Dy 2 O 3 could form defect solid solution, stop grain growth, fine crystal grain, widen curie peak, obtaining high dielectric constant and low dielectric loss, capacitance temperature property was suited for X7R character, in the (Ba,Sr)TiO 3 series Ceramics. At the same time, the voltage withstand strength was enhanced greatly.

  • influence of composition on properties of medium temperature sintering ba sr tio3 series Capacitor Ceramics
    Journal of Rare Earths, 2006
    Co-Authors: Huang Xinyou, Zhao Chen, Chen Zhigang, Gao Chunhua
    Abstract:

    Abstract The influence of the composition (Yb 2 O 3 , MgO, CeO 2 , Li 2 CO 3 ) on the dielectric properties of medium temperature sintering (Ba,Sr)TiO 3 (BST) series Capacitor Ceramics was investigated by means of conventional technology process and orthogonal design experiments. The major secondary influencing factors and the influencing tendency of various factor's levels for the dielectric properties of BST Ceramics were obtained. The optimum formula for maximum dielectric constant ɛ and for minimum dielectric loss (tanδ) was obtained under the experimental conditions. The BST Ceramics with optimum comprehensive properties was obtained by means of orthogonal design experiments, with the sintering temperature at 1200 °C, the dielectric constant 5239, the dielectric loss 0.0097, withstand electric voltage over 6 MV · m −1 , capacitance temperature changing rate (Δ C/C ) − 75.67%, and suited for Y5V character. The mechanism of the influence of various components on the dielectric properties of medium temperature sintering BST Ceramics was studied, thus providing the basis for preparation of multilayer Capacitor Ceramics and single-chip Capacitor Ceramics.

Huang Xinyou - One of the best experts on this subject based on the ideXlab platform.

  • effect of y2o3 and dy2o3 on dielectric properties of ba0 7 sr0 3 tio3 series Capacitor Ceramics
    Journal of Rare Earths, 2007
    Co-Authors: Zhao Chen, Huang Xinyou, Guan Hao, Gao Chunhua
    Abstract:

    Abstract The effects of rare earth oxide (Y2O3 and Dy2O3) on the microstructure and dielectric properties of Ba0.7Sr0.3 TiO3(BST) series Capacitor Ceramics were studied, and the low of the influence of Y2O3 and Dy2O3 doping amount on the BST series Capacitor Ceramics was obtained. The strong correlation was observed between the dopant concentration and materials properties. It was also found out that different rare earth oxides and amount had different influences on BST. The experimental results showed that the dysprosium oxide (Dy2O3) could restrain abnormal grain growth during the sintering process and fining grain, the yttrium oxide(Y2O3) could decrease dielectric loss, and the permittivity could be increased by more than 40% compared with nominally undoped BST Ceramics. The BST Ceramics with optimum comprehensive properties was obtained, having high dielectric constant (ɛ = 3658), low dielectric loss (tanδ = 0.0093) and low dielectric constant temperature changing rate absolute value((Δɛ/ɛ) = 14.1%) while w(Dy2O3) = 1.00%.

  • study on dy2o3 doped medium temperature sintering ba sr tio3 series Capacitor Ceramics
    Journal of Rare Earths, 2007
    Co-Authors: Huang Xinyou, Zhao Chen, Chen Zhigang, Gao Chunhua, Chen Xiangchong, Guan Hao
    Abstract:

    Abstract The influence of Dy 2 O 3 doping on the properties of medium temperature sintering (Ba, Sr)TiO 3 series Capacitor Ceramics was studied by single factor various amount method, and the law of the influence on the medium temperature sintering (Ba, Sr)TiO 3 series Capacitor Ceramics was obtained. The dielectric materials used for multilayer ceramic Capacitor was obtained, of which the dielectric constant was 1375, the dielectric loss was 0.0060, the density was 5.92 g·cm −3 , the sintering temperature was less than 1150 °C, the capacitance temperature changing rate (Δ C/C ) was less than ± 15%, the voltage withstand strength was more than 9.3 kV·mm −1 , and the crystal grain size was about 1 μm. The surface morphology of the sample doped with various amount Dy 2 O 3 was analyzed by scanning electron microscope (SEM). The results showed that doping Dy 2 O 3 could form defect solid solution, stop grain growth, fine crystal grain, widen curie peak, obtaining high dielectric constant and low dielectric loss, capacitance temperature property was suited for X7R character, in the (Ba,Sr)TiO 3 series Ceramics. At the same time, the voltage withstand strength was enhanced greatly.

  • influence of composition on properties of medium temperature sintering ba sr tio3 series Capacitor Ceramics
    Journal of Rare Earths, 2006
    Co-Authors: Huang Xinyou, Zhao Chen, Chen Zhigang, Gao Chunhua
    Abstract:

    Abstract The influence of the composition (Yb 2 O 3 , MgO, CeO 2 , Li 2 CO 3 ) on the dielectric properties of medium temperature sintering (Ba,Sr)TiO 3 (BST) series Capacitor Ceramics was investigated by means of conventional technology process and orthogonal design experiments. The major secondary influencing factors and the influencing tendency of various factor's levels for the dielectric properties of BST Ceramics were obtained. The optimum formula for maximum dielectric constant ɛ and for minimum dielectric loss (tanδ) was obtained under the experimental conditions. The BST Ceramics with optimum comprehensive properties was obtained by means of orthogonal design experiments, with the sintering temperature at 1200 °C, the dielectric constant 5239, the dielectric loss 0.0097, withstand electric voltage over 6 MV · m −1 , capacitance temperature changing rate (Δ C/C ) − 75.67%, and suited for Y5V character. The mechanism of the influence of various components on the dielectric properties of medium temperature sintering BST Ceramics was studied, thus providing the basis for preparation of multilayer Capacitor Ceramics and single-chip Capacitor Ceramics.

Zhao Chen - One of the best experts on this subject based on the ideXlab platform.

  • effect of y2o3 and dy2o3 on dielectric properties of ba0 7 sr0 3 tio3 series Capacitor Ceramics
    Journal of Rare Earths, 2007
    Co-Authors: Zhao Chen, Huang Xinyou, Guan Hao, Gao Chunhua
    Abstract:

    Abstract The effects of rare earth oxide (Y2O3 and Dy2O3) on the microstructure and dielectric properties of Ba0.7Sr0.3 TiO3(BST) series Capacitor Ceramics were studied, and the low of the influence of Y2O3 and Dy2O3 doping amount on the BST series Capacitor Ceramics was obtained. The strong correlation was observed between the dopant concentration and materials properties. It was also found out that different rare earth oxides and amount had different influences on BST. The experimental results showed that the dysprosium oxide (Dy2O3) could restrain abnormal grain growth during the sintering process and fining grain, the yttrium oxide(Y2O3) could decrease dielectric loss, and the permittivity could be increased by more than 40% compared with nominally undoped BST Ceramics. The BST Ceramics with optimum comprehensive properties was obtained, having high dielectric constant (ɛ = 3658), low dielectric loss (tanδ = 0.0093) and low dielectric constant temperature changing rate absolute value((Δɛ/ɛ) = 14.1%) while w(Dy2O3) = 1.00%.

  • study on dy2o3 doped medium temperature sintering ba sr tio3 series Capacitor Ceramics
    Journal of Rare Earths, 2007
    Co-Authors: Huang Xinyou, Zhao Chen, Chen Zhigang, Gao Chunhua, Chen Xiangchong, Guan Hao
    Abstract:

    Abstract The influence of Dy 2 O 3 doping on the properties of medium temperature sintering (Ba, Sr)TiO 3 series Capacitor Ceramics was studied by single factor various amount method, and the law of the influence on the medium temperature sintering (Ba, Sr)TiO 3 series Capacitor Ceramics was obtained. The dielectric materials used for multilayer ceramic Capacitor was obtained, of which the dielectric constant was 1375, the dielectric loss was 0.0060, the density was 5.92 g·cm −3 , the sintering temperature was less than 1150 °C, the capacitance temperature changing rate (Δ C/C ) was less than ± 15%, the voltage withstand strength was more than 9.3 kV·mm −1 , and the crystal grain size was about 1 μm. The surface morphology of the sample doped with various amount Dy 2 O 3 was analyzed by scanning electron microscope (SEM). The results showed that doping Dy 2 O 3 could form defect solid solution, stop grain growth, fine crystal grain, widen curie peak, obtaining high dielectric constant and low dielectric loss, capacitance temperature property was suited for X7R character, in the (Ba,Sr)TiO 3 series Ceramics. At the same time, the voltage withstand strength was enhanced greatly.

  • influence of composition on properties of medium temperature sintering ba sr tio3 series Capacitor Ceramics
    Journal of Rare Earths, 2006
    Co-Authors: Huang Xinyou, Zhao Chen, Chen Zhigang, Gao Chunhua
    Abstract:

    Abstract The influence of the composition (Yb 2 O 3 , MgO, CeO 2 , Li 2 CO 3 ) on the dielectric properties of medium temperature sintering (Ba,Sr)TiO 3 (BST) series Capacitor Ceramics was investigated by means of conventional technology process and orthogonal design experiments. The major secondary influencing factors and the influencing tendency of various factor's levels for the dielectric properties of BST Ceramics were obtained. The optimum formula for maximum dielectric constant ɛ and for minimum dielectric loss (tanδ) was obtained under the experimental conditions. The BST Ceramics with optimum comprehensive properties was obtained by means of orthogonal design experiments, with the sintering temperature at 1200 °C, the dielectric constant 5239, the dielectric loss 0.0097, withstand electric voltage over 6 MV · m −1 , capacitance temperature changing rate (Δ C/C ) − 75.67%, and suited for Y5V character. The mechanism of the influence of various components on the dielectric properties of medium temperature sintering BST Ceramics was studied, thus providing the basis for preparation of multilayer Capacitor Ceramics and single-chip Capacitor Ceramics.

Guan Hao - One of the best experts on this subject based on the ideXlab platform.

  • study on dy2o3 doped medium temperature sintering ba sr tio3 series Capacitor Ceramics
    Journal of Rare Earths, 2007
    Co-Authors: Huang Xinyou, Zhao Chen, Chen Zhigang, Gao Chunhua, Chen Xiangchong, Guan Hao
    Abstract:

    Abstract The influence of Dy 2 O 3 doping on the properties of medium temperature sintering (Ba, Sr)TiO 3 series Capacitor Ceramics was studied by single factor various amount method, and the law of the influence on the medium temperature sintering (Ba, Sr)TiO 3 series Capacitor Ceramics was obtained. The dielectric materials used for multilayer ceramic Capacitor was obtained, of which the dielectric constant was 1375, the dielectric loss was 0.0060, the density was 5.92 g·cm −3 , the sintering temperature was less than 1150 °C, the capacitance temperature changing rate (Δ C/C ) was less than ± 15%, the voltage withstand strength was more than 9.3 kV·mm −1 , and the crystal grain size was about 1 μm. The surface morphology of the sample doped with various amount Dy 2 O 3 was analyzed by scanning electron microscope (SEM). The results showed that doping Dy 2 O 3 could form defect solid solution, stop grain growth, fine crystal grain, widen curie peak, obtaining high dielectric constant and low dielectric loss, capacitance temperature property was suited for X7R character, in the (Ba,Sr)TiO 3 series Ceramics. At the same time, the voltage withstand strength was enhanced greatly.

  • effect of y2o3 and dy2o3 on dielectric properties of ba0 7 sr0 3 tio3 series Capacitor Ceramics
    Journal of Rare Earths, 2007
    Co-Authors: Zhao Chen, Huang Xinyou, Guan Hao, Gao Chunhua
    Abstract:

    Abstract The effects of rare earth oxide (Y2O3 and Dy2O3) on the microstructure and dielectric properties of Ba0.7Sr0.3 TiO3(BST) series Capacitor Ceramics were studied, and the low of the influence of Y2O3 and Dy2O3 doping amount on the BST series Capacitor Ceramics was obtained. The strong correlation was observed between the dopant concentration and materials properties. It was also found out that different rare earth oxides and amount had different influences on BST. The experimental results showed that the dysprosium oxide (Dy2O3) could restrain abnormal grain growth during the sintering process and fining grain, the yttrium oxide(Y2O3) could decrease dielectric loss, and the permittivity could be increased by more than 40% compared with nominally undoped BST Ceramics. The BST Ceramics with optimum comprehensive properties was obtained, having high dielectric constant (ɛ = 3658), low dielectric loss (tanδ = 0.0093) and low dielectric constant temperature changing rate absolute value((Δɛ/ɛ) = 14.1%) while w(Dy2O3) = 1.00%.

Chen Zhigang - One of the best experts on this subject based on the ideXlab platform.

  • study on dy2o3 doped medium temperature sintering ba sr tio3 series Capacitor Ceramics
    Journal of Rare Earths, 2007
    Co-Authors: Huang Xinyou, Zhao Chen, Chen Zhigang, Gao Chunhua, Chen Xiangchong, Guan Hao
    Abstract:

    Abstract The influence of Dy 2 O 3 doping on the properties of medium temperature sintering (Ba, Sr)TiO 3 series Capacitor Ceramics was studied by single factor various amount method, and the law of the influence on the medium temperature sintering (Ba, Sr)TiO 3 series Capacitor Ceramics was obtained. The dielectric materials used for multilayer ceramic Capacitor was obtained, of which the dielectric constant was 1375, the dielectric loss was 0.0060, the density was 5.92 g·cm −3 , the sintering temperature was less than 1150 °C, the capacitance temperature changing rate (Δ C/C ) was less than ± 15%, the voltage withstand strength was more than 9.3 kV·mm −1 , and the crystal grain size was about 1 μm. The surface morphology of the sample doped with various amount Dy 2 O 3 was analyzed by scanning electron microscope (SEM). The results showed that doping Dy 2 O 3 could form defect solid solution, stop grain growth, fine crystal grain, widen curie peak, obtaining high dielectric constant and low dielectric loss, capacitance temperature property was suited for X7R character, in the (Ba,Sr)TiO 3 series Ceramics. At the same time, the voltage withstand strength was enhanced greatly.

  • influence of composition on properties of medium temperature sintering ba sr tio3 series Capacitor Ceramics
    Journal of Rare Earths, 2006
    Co-Authors: Huang Xinyou, Zhao Chen, Chen Zhigang, Gao Chunhua
    Abstract:

    Abstract The influence of the composition (Yb 2 O 3 , MgO, CeO 2 , Li 2 CO 3 ) on the dielectric properties of medium temperature sintering (Ba,Sr)TiO 3 (BST) series Capacitor Ceramics was investigated by means of conventional technology process and orthogonal design experiments. The major secondary influencing factors and the influencing tendency of various factor's levels for the dielectric properties of BST Ceramics were obtained. The optimum formula for maximum dielectric constant ɛ and for minimum dielectric loss (tanδ) was obtained under the experimental conditions. The BST Ceramics with optimum comprehensive properties was obtained by means of orthogonal design experiments, with the sintering temperature at 1200 °C, the dielectric constant 5239, the dielectric loss 0.0097, withstand electric voltage over 6 MV · m −1 , capacitance temperature changing rate (Δ C/C ) − 75.67%, and suited for Y5V character. The mechanism of the influence of various components on the dielectric properties of medium temperature sintering BST Ceramics was studied, thus providing the basis for preparation of multilayer Capacitor Ceramics and single-chip Capacitor Ceramics.