Corrigendum to “Constrained sintering: A delicate balance of scales” [J. Eur. Ceram. Soc. 28 (2008) 1451–1466]

Green, D.J.; Guillon, Olivier; Rödel, Jürgen

doi:10.1016/j.jeurceramsoc.2008.07.053

Cited by 22 publications

(30 citation statements)

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“…For cases where either a non-isotropic strain or non-isotropic stress field is applied to the sintering bodies, directional diffusional fluxes lead to elongated pores and as soon as grain growth sets in to elongated grains. [18] Indeed constrained sintered BNT films exhibit a high textured microstructure with a high aspect ratio of the elongated grains (23 for films sintered at 1450 8C for 1 h; Fig. 3g).…”

Section: Discussionmentioning

confidence: 99%

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Textured Microstructure and Dielectric Properties Relationship of BaNd₂Ti₅O₁₄ Thick Films Prepared by Electrophoretic Deposition

Vilarinho

et al. 2009

Adv Funct Materials

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An alternative approach to tailor the temperature coefficient of permittivity (TCεr) of high Q dielectric BaO–Re2O3–TiO2 (Re: rare earth elements) thick films is presented. 10‐ to 80‐µm‐thick BaNd2Ti5O14 (BNT) films are fabricated by electrophoretic deposition on Pt foils under different processing conditions. Observed anisotropic grain growth is facilitated by constrained sintering. The increase of the sintering temperature increases markedly the aspect ratio of the grains, decreases the dielectric permittivity and TCεr changes from −114 to +12 ppm °C−1. By controlling the sintering temperature, near‐zero TCεr, high Q thick films can be fabricated with 45 < εr < 70. These findings are of technological relevance since they demonstrate that control of substrate constraint and sintering conditions can be used to control grain anisotropy and thus microwave properties of the BaO–Re2O3–TiO2. The thick films facilitate scaling to small device sizes for high frequency operation. Similar observations are expected in other microwave systems thus opening further technological opportunities.

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Section: Discussionmentioning

confidence: 99%

“…[15][16][17] An isotropic formulation was firstly developed to understand the densification of constrained films, and according to the relationship: [17,18] r r constr:…”

Section: Discussionmentioning

confidence: 99%

Textured Microstructure and Dielectric Properties Relationship of BaNd₂Ti₅O₁₄ Thick Films Prepared by Electrophoretic Deposition

Vilarinho

et al. 2009

Adv Funct Materials

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“…Garino and coworkers [7][8][9] also attempted to quantify the effect of constraint on sintering rates, using essentially empirical relationships. Particular attention has been paid [10,11] to the anisotropic nature of the process and the recent review of Green et al [12] also highlights this aspect. These treatments were based on the concept of a viscous Poisson coefficient.…”

Section: Introductionmentioning

confidence: 99%

A sintering model for plasma-sprayed zirconia thermal barrier coatings. Part II: Coatings bonded to a rigid substrate

2009

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The sintering model described in Part I, which relates to free-standing plasma-sprayed thermal barrier coatings, is extended here to the case of a coating attached to a rigid substrate. Through-thickness shrinkage measurements have been carried out for coatings attached to zirconia substrates, and these experimental data are compared with model predictions. The model is then used to explore the influence of the substrate material (zirconia vs. a nickel superalloy), and of the in-plane coating stiffness. Both differential thermal expansion stresses and tensile stresses arising from the constraint imposed on in-plane shrinkage can be relaxed via two diffusional mechanisms: Coble creep and microcrack opening. This relaxation allows progression towards densification, although the process is somewhat inhibited, compared with the case of a free-standing coating. Comparison of the stored elastic strain energy with the critical strain energy release rate for interfacial cracking allows estimates to be made of whether debonding is energetically favoured.

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“…Increasing sintering temperature tended to promote grain growth and shrinkage of the electrode. However, the substrate applied a constraining effect on the shrinkage behavior, resulting in internal stress in the electrode layer [25]. As a result, the porosity of the electrode was increased to release the internal stress.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and electrode properties of La0.6Sr0.4Co0.2Fe0.8O3-δ spin-coated on Ce0.8Sm0.2O2−δ electrolyte

Zhao

Huang

et al. 2010

Ionics

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Fine and uniform La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3−δ powder was synthesized by a glycine-nitrate combustion process. La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3−δ electrodes were prepared on dense Ce 0.8 Sm 0.2 O 2−δ electrolyte substrates using a spin-coating technique by sintering at 900-1,000°C. The electrode properties of La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3−δ were investigated by electrochemical impedance spectroscopy and chronopotentiometry techniques with respect to preparation conditions and the resulting microstructures. The results indicate a significant effect of the microstructure on the electrode processes and polarization characteristics. The oxygen adsorption and dissociation process acted as a larger contribution to the overall electrode polarization R p in magnitude compared with the charge transfer process due to relatively low porosity levels of the electrodes. It was detected that the grain size of the electrodes exhibited a crucial role on the electrocatalytic reactivity. At 800°C, the electrode sintered at 950°C attained a polarization resistance of 0.18 Ω cm 2 , an overpotential of 27 mV at a current density of 200 mA cm −2 , and an exchange current density of 308 mA cm −2 .

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Corrigendum to “Constrained sintering: A delicate balance of scales” [J. Eur. Ceram. Soc. 28 (2008) 1451–1466]

Cited by 22 publications

References 0 publications

Textured Microstructure and Dielectric Properties Relationship of BaNd₂Ti₅O₁₄ Thick Films Prepared by Electrophoretic Deposition

Textured Microstructure and Dielectric Properties Relationship of BaNd₂Ti₅O₁₄ Thick Films Prepared by Electrophoretic Deposition

A sintering model for plasma-sprayed zirconia thermal barrier coatings. Part II: Coatings bonded to a rigid substrate

Microstructure and electrode properties of La0.6Sr0.4Co0.2Fe0.8O3-δ spin-coated on Ce0.8Sm0.2O2−δ electrolyte

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Corrigendum to “Constrained sintering: A delicate balance of scales” [J. Eur. Ceram. Soc. 28 (2008) 1451–1466]

Cited by 22 publications

References 0 publications

Textured Microstructure and Dielectric Properties Relationship of BaNd2Ti5O14 Thick Films Prepared by Electrophoretic Deposition

Textured Microstructure and Dielectric Properties Relationship of BaNd2Ti5O14 Thick Films Prepared by Electrophoretic Deposition

A sintering model for plasma-sprayed zirconia thermal barrier coatings. Part II: Coatings bonded to a rigid substrate

Microstructure and electrode properties of La0.6Sr0.4Co0.2Fe0.8O3-δ spin-coated on Ce0.8Sm0.2O2−δ electrolyte

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Product

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Textured Microstructure and Dielectric Properties Relationship of BaNd₂Ti₅O₁₄ Thick Films Prepared by Electrophoretic Deposition

Textured Microstructure and Dielectric Properties Relationship of BaNd₂Ti₅O₁₄ Thick Films Prepared by Electrophoretic Deposition