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  • 1
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    Erratum to: Volume 5, Issue 4, December 2016 (2017)
    Springer
    Details
    Publication Date: 2017-03-01
    Print ISSN: 2226-4108
    Electronic ISSN: 2227-8508
    Topics: General, Interdisciplinary , Chemistry and Pharmacology , Physics
    Published by Springer
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    PAPER CURRENT
  • 2
    Electronic Resource
    Electronic Resource
    Low-Temperature Sintering and Electromagnetic Properties of Copper-Modified Z-type Hexaferrite (2002)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 85 (2002), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The influence of the substitution of copper for cobalt on the low-sintering densification, microstructure, lattice parameters, and electromagnetic properties of planar Z-type hexaferrites, which have a stoichiometric composition of Ba3Co2(10.8−x)-Zn0.4Cu2xFe24O41, were investigated. The experimental results show that densification of the copper-substituted hexaferrite is dependent on the amount of copper substitution and sintering temperatures. XRD analysis reveals that the solid solubility of copper in Z-type hexaferrite is limited to x≤ 0.30. At the same time, the lattice parameters (a and c) of Z-type hexaferrites with copper substitution showed a small change, that is, decrease of a parameter in the basal plane and increase of the c axial. Moreover, the microstructure becomes more homogeneous and intragranular pores decrease considerably, but the temperature-stable range of the Z-type phase formation is narrow. The copper-substituted hexaferrites, with x= 0.20 and sintered at ∼1125°C for 4 h, resulted in a high density sample of ∼4.68 g/cm3 as the optimal value, good magnetic properties, and the enormous potentiality for fabrication of multilayer chip inductors used in hyper-frequencies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1151-2916.2002.tb00242.x
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  • 3
    Electronic Resource
    Electronic Resource
    Effects of Additives on the Interfacial Microstructure of Cofired Electrode-Ceramic Multilayer Systems (2002)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 85 (2002), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: An investigation of the cofired behavior between silver/palladium electrode paste and lead-based relaxor ferroelectric ceramics demonstrated that mismatched sintering shrinkage was caused by differential sintering kinetics. Improvement of the cofired characteristics was obtained by adding different ceramic powders into the electrode paste. The sintering kinetics analyses show that the roles of ceramic additives lie in changing the densification mechanism of the silver/palladium electrode paste. Scanning electron microscopy observations indicate that ceramic additives apparently improve the interfacial bonding by the formation of chemical reaction layers. Compared to BaTiO3-based ceramic additives, which are caused by palladium-lead-based reactions analyzed from the X-ray diffraction spectrum, lead-based perovskite additives will degrade the electronic properties and decrease the melting point of the silver/palladium electrode to a certain extent. Criteria for choosing ceramic additives have been proposed in this paper.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1151-2916.2002.tb00173.x
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  • 4
    Electronic Resource
    Electronic Resource
    Synthesis of (Pb,La)(Zr,Ti)O3 Inverse Opal Photonic Crystals (2003)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 86 (2003), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: (Pb,La)(Zr,Ti)O3 (PLZT) inverse opal photonic crystals were synthesized by a sol-gel process with synthetic opal templates of monodisperse submicrometer polystyrene spheres. This process involves infiltration of precursors into the interstices of the opal template, followed by hydrolytic condensation of the precursors and removal of the polystyrene opal combined with crystallization of PLZT perovskite by calcination at a final temperature of 750°C. By this method, PLZT inverse opal photonic crystals with a periodical structure of 280 nm center-to-center distance between the air spheres are prepared from opal templates of polystyrene microspheres with a mean diameter of 400 nm. The PLZT inverse opals reflect yellow-green light strongly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1151-2916.2003.tb03389.x
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  • 5
    Electronic Resource
    Electronic Resource
    A size estimation of ordered domains in Pb(Mg1/3Nb2/3)O3 ceramics (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 72 (1992), S. 5822-5826 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The size of ordered domains in Pb(Mg1/3Nb2/3)O3 ceramics is estimated by minimizing the Helmholtz free energy of the system. All the differences between the ordered domains and the disordered matrix are taken into consideration. The charge imbalance plays an important role in the system. The theoretical estimation agrees satisfactorily with measured results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.351937
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  • 6
    Electronic Resource
    Electronic Resource
    Dielectric behavior of Co2Z hexagonal ferrites with multiple modifications (2002)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 91 (2002), S. 5230-5233 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The dielectric characteristics of Co2Z hexagonal ferrites with Cu and Zn modifications are reported. Dielectric characterization experiments are performed in Z-type hexagonal ferrites having composition of Ba3Co2(1−x−y)Cu2xZn2yFe24−δO41, measuring the dielectric constant and loss tan(delta). Different dielectric behaviors are observed in the modified and pure Co2Z hexagonal ferrites, indicating that different kinds of carrier polarizations are involved in the ferrites. This conclusion is also indirectly supported by x-ray photoelectron spectroscopy experiments, where it is shown that the variation of iron ions features the different dielectric behaviors. The impact of iron deficiency and other possible mechanisms are also addressed. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1459742
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  • 7
    Electronic Resource
    Electronic Resource
    Photoluminescence of CdSe nanocrystallites embedded in BaTiO3 matrix (2000)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 76 (2000), S. 1540-1542 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: This letter reports the photoluminescence properties of CdSe quantum dots (QDs) embedded in a ferroelectric BaTiO3 matrix. The main emission from the samples has been assigned to the band–edge transition of QDs. With an increase in the heat treatment temperature, the emission peak has been shifted to a longer wavelength. This shift has been attributed due to the dielectric environment effects of the matrix on the electronic structure of the QDs. The dependences of the peak position on the heat-treatment temperature and dot size are found in agreement with the theoretical simulation results reported previously. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.126089
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  • 8
    Electronic Resource
    Electronic Resource
    Improvement of the PTCR Effect in Ba1-xSrxTiO3 Semiconducting Ceramics by Doping of Bi2O3 Vapor during Sintering (1998)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 81 (1998), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The influence on the PTCR effect in Ba1-xSrxTiO3 semiconducting ceramics by doping of Bi2O3 vapor during its sintering is reported in this paper. Comparative experiments showed that the grains of Bi2O3-vapor-doped samples were much smaller than those of undoped ones; both the magnitude of the resistance jump and the positive temperature coefficient of resistance were considerably increased. Very dense samples with 8 orders of magnitude of resistance jump were obtained. The mechanism for the effect of Bi2O3 vapor doping is also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1151-2916.1998.tb02355.x
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  • 9
    Electronic Resource
    Electronic Resource
    Mechanical Activation-Assisted Synthesis of Pb(Fe2/3W1/3)O3 (2000)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 83 (2000), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Perovskite Pb(Fe2/3W1/3)O3 (PFW) was prepared via a mechanical activation-assisted synthesis route from mixed oxides of PbO, Fe2O3, and WO3. The mechanically activated oxide mixture, which exhibited a specific area of 〉10 m2/g, underwent phase conversion from nanocrystalline lead tungstate (PbWO4) and pyrochlore (Pb2FeWO6.5) phases on sintering to yield perovskite PFW, although the formation of perovskite phase was not triggered by mechanical activation. When heated to 700°C, 〉98% perovskite phase was formed in the mechanically activated oxide mixture. The perovskite phase was sintered to a density of ∼99% of theoretical density at 870°C for 2 h. The sintered PFW exhibited a dielectric constant of 9800 at 10 kHz, which was ∼30% higher than that of the PFW derived from the oxide mixture that was not subjected to mechanical activation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1151-2916.2000.tb01433.x
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  • 10
    Electronic Resource
    Electronic Resource
    Low-Temperature Sintering, Densification, and Properties of Z-type Hexaferrite with Bi2O3 Additives (2001)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 84 (2001), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The effect of the addition of Bi2O3 on the densification, low-temperature sintering, and electromagnetic properties of Z-type planar hexaferrite was investigated. The results show that Bi2O3 additives can improve the densification and promote low-temperature sintering of Z-type hexaferrite prepared by a solid-state reaction method. The presence of Bi2O3 in the grain boundaries and the generation of Fe2+ degrade the initial permeability of the samples but make the quality factor and cut-off frequency increase. Various possible mechanisms involved in generating these effects were also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1151-2916.2001.tb01110.x
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