The effect of cation size on structure and properties of Ba-based tetragonal tungsten bronzes Ba4M2Nb10O30 (M = Na, K or Rb) and Ba4M2Nb8Ti2O30 (M = Ca or Sr)

Løndal, Nora Statle; Williamson, Benjamin Albert Dobson; Walker, Julian; Einarsrud, Mari-Ann; Grande, Tor

doi:10.1039/d3cp05666j

Phys. Chem. Chem. Phys.

2024

DOI: 10.1039/d3cp05666j

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The effect of cation size on structure and properties of Ba-based tetragonal tungsten bronzes Ba₄M₂Nb₁₀O₃₀ (M = Na, K or Rb) and Ba₄M₂Nb₈Ti₂O₃₀ (M = Ca or Sr)

Nora Statle Løndal,

Benjamin Albert Dobson Williamson,

Julian Walker

et al.

Abstract: The second largest family of oxide ferroelectrics, after perovskites, are the tetragonal tungsten bronzes (TTB) with the general formula A24A12C4B12B28O30. Cation disorder in TTBs is known to occur if the...

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Cited by 3 publications

References 71 publications

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On the solubility of Bi in tetragonal tungsten bronzes

Zeiger,

Williamson,

Walker

et al. 2024

Journal of the European Ceramic Society

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On the solubility of Bi in tetragonal tungsten bronzes

Zeiger,

Williamson,

Walker

et al. 2024

Journal of the European Ceramic Society

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Structural and electrical properties of tetragonal tungsten bronze K4Bi2Nb10O30-Ba4Na2Nb10O30 solid solutions across two proximate phase transitions

Løndal,

Zeiger,

Grendal

et al. 2024

Journal of the European Ceramic Society

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Investigate the effect of co-doping on the grain size and diffuse phase transition of barium titanate ceramics

Alkathy,

Goud,

Ibrahim

et al. 2024

JOR

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An investigation examined the impact of co-doping BaTiO3 ceramics with La3+ and Nd3+ on their microstructural, dielectric, and phase transition properties. The synthesis of BaTiO3 with co-doping of La3+ and Nd3+, using the general formula Ba1-x(La1/3, Nd1/3)xTiO3 (BLNdTx) with varying concentrations of x (0%, 2%, 4%, and 8%), is achieved by the solid-state reaction technique. A temperature-dependent dielectric permittivity investigation was conducted at four distinct frequencies (1 kHz, 10 kHz, 100 kHz, 500 kHz, and 1 MHz) within the 30–200 °C temperature range. The findings indicate that the samples show a diffuse phase transition and a noticeable divergence from the typical Curie-Weiss equation. The diffuseness parameters γ for phase transition rose from 1.15 to 1.75 as x grew from 0 to 8%, respectively. The concurrent impact of surface phenomena, mechanical stress phenomena, and the external effect of grain boundaries might explain the substantial size reduction. An in-depth understanding of the grain size effect and its underlying mechanism would be advantageous for advancing and practically using BaTiO3-based ceramics and other ferroelectrics.

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The effect of cation size on structure and properties of Ba-based tetragonal tungsten bronzes Ba₄M₂Nb₁₀O₃₀ (M = Na, K or Rb) and Ba₄M₂Nb₈Ti₂O₃₀ (M = Ca or Sr)

Abstract: The second largest family of oxide ferroelectrics, after perovskites, are the tetragonal tungsten bronzes (TTB) with the general formula A24A12C4B12B28O30. Cation disorder in TTBs is known to occur if the...

Cited by 3 publications

References 71 publications

On the solubility of Bi in tetragonal tungsten bronzes

On the solubility of Bi in tetragonal tungsten bronzes

Structural and electrical properties of tetragonal tungsten bronze K4Bi2Nb10O30-Ba4Na2Nb10O30 solid solutions across two proximate phase transitions

Investigate the effect of co-doping on the grain size and diffuse phase transition of barium titanate ceramics

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