What question did this study set out to answer?

To investigate the influence of dopant chemistry and diffusion behavior of MgO versus MgCO3 on the formation of core–shell structures and dielectric thermal stability in BaTiO3-based ceramics.

August 16, 2026Journal of Advanced DielectricsOpen Access

Formation mechanism of core–shell structures in Mg-doped BaTiO 3 -based ceramics for high-temperature MLCCs application

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Authors

SLSaiwei LuanKunming University of Science and Technology LXLei XuKunming University of Science and Technology HHHuizhan HeChinese Academy of Sciences

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Implication

Experimental study reveals controlled magnesium diffusion enables stable core-shell structures in barium titanate ceramics, indicating superior high-temperature capacitor reliability.

Key Points

To investigate the influence of dopant chemistry and diffusion behavior of MgO versus MgCO3 on the formation of core–shell structures and dielectric thermal stability in BaTiO3-based ceramics.
Fabricated 0.9BaTiO3–0.1(Bi0.5Na0.5)TiO3 ceramics co-modified with 2.0 mol% Nb2O5 using a conventional solid-state reaction method.
Introduced varying concentrations of either MgO or MgCO3 to systematically compare dopant reactivity, ion incorporation, and microstructural evolution during sintering.
Rapid diffusion and high reactivity of MgO caused compositional homogenization across grains, impeding distinct core–shell formation and deteriorating the temperature coefficient of capacitance.
Progressive decomposition of MgCO3 facilitated controlled Mg2+ diffusion and preserved compositional gradients, forming well-defined core–shell architectures that met the X9R specification from −55 to 200 °C.

Cite This Study

Luan et al. (2026) studied this question.

synapsesocial.com/papers/6a817a01f2fb91fc834ad81c https://doi.org/10.1142/s2010135x2650030x

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Implication

Experimental study reveals controlled magnesium diffusion enables stable core-shell structures in barium titanate ceramics, indicating superior high-temperature capacitor reliability.

Formation mechanism of core–shell structures in Mg-doped BaTiO 3 -based ceramics for high-temperature MLCCs application

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Implication

Key Points

Cite This Study

Formation mechanism of core–shell structures in Mg-doped BaTiO 3 -based ceramics for high-temperature MLCCs application

Discussion

Member takes

Implication

Key Points

Cite This Study

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