Zinc Oxide and Bismuth Pyrochlore Ceramics for Voltage Protection and Dielectric Applications

This community develops ceramic materials designed to protect electrical circuits from voltage surges and to manage dielectric properties in power systems.

The work centers on two distinct material families: zinc oxide (ZnO) varistor ceramics and bismuth-based pyrochlore oxides. For ZnO varistors, research focuses on optimizing microstructure, grain boundary properties, and doping strategies to achieve high voltage gradients and low leakage currents. Common additives include chromium, cobalt, and rare-earth oxides like erbium and praseodymium. The second strand involves bismuth niobate and tantalate pyrochlores, where studies examine synthesis, crystal structure, and dielectric behavior. Characterization methods frequently include X-ray photoelectron spectroscopy (XPS) and near-edge X-ray absorption fine structure (NEXAFS) to analyze surface and bulk electronic states.

The largest share of the community's output is found in zinc research, accounting for 30.0% of all zinc research tracked here, with 240 papers. Bismuth research follows with 189 papers, representing 0.6% of bismuth research.

The community comprises 784 papers, publishing primarily in Ceramics International, the Journal of the American Ceramic Society, and the Journal of Applied Physics.

Recent work continues to refine ZnO varistor performance through advanced sintering techniques and aging mechanism analysis, while also exploring non-bismuth metal oxide varistor compositions and the dielectric properties of doped bismuth pyrochlores.

Papers behind this description

An investigation of the Structural, Electrical and Optical Properties of Graphene-Oxide Thin Films Using Different Solvents — Journal of Physics Conference Series, 2021 — doi:10.1088/1742-6596/1795/1/012052
Ultrahigh voltage-gradient ZnO-based varistor ceramics via hybrid cold sintering process/spark plasma sintering and post-annealing process — Journal of Advanced Ceramics, 2025 — doi:10.26599/jac.2025.9221065
Power loss transition of stable ZnO varistor ceramics: Role of oxygen adsorption on the stability of interface states at the grain boundary — Journal of Advanced Ceramics, 2023 — doi:10.26599/jac.2023.9220732
Influence of Cr2O3 doping on the electrical characteristics of novel ZnO-Cr2O3-based varistor ceramics — Materials Research Bulletin, 2022 — doi:10.1016/j.materresbull.2022.112111
Effects of sintering temperature on microstructure and varistor performances of ZnO-SrCO3-Co2O3 ceramics — Ceramics International, 2024 — doi:10.1016/j.ceramint.2024.10.031
Bi–Er–O pre-synthesized phase (Bi1-Er )2O3 doped ZnO varistors with high nonlinear coefficient and low leakage current — Ceramics International, 2024 — doi:10.1016/j.ceramint.2024.03.321
Er2O3 doped ZnO–Cr2O3-based varistors with high voltage gradient — Ceramics International, 2024 — doi:10.1016/j.ceramint.2024.07.139
Influence of Eu2O3 on microstructure and electrical properties of ZnO-Pr6O11 based varistors — Ceramics International, 2023 — doi:10.1016/j.ceramint.2023.11.167
A Dielectric Polymer/Metal Oxide Nanowire Composite for Self-Adaptive Charge Release — Nano Letters, 2022 — doi:10.1021/acs.nanolett.2c00887
Processing–structure–property relationships in nanostructured ZnO varistors: Effects of advanced sintering and additive design — Ceramics International, 2025 — doi:10.1016/j.ceramint.2025.10.392
Effects of SiO2 on the microstructure and electrical properties of ZnO-based varistors (ZBSCCM) prepared by two-step sintering routework — Ceramics International, 2023 — doi:10.1016/j.ceramint.2023.09.050
Influence of Co2O3 doping on the microstructure and electrical properties of ZnO–Bi2O3-based varistors — Materials Science in Semiconductor Processing, 2022 — doi:10.1016/j.mssp.2022.107179
Thermal-assisted cold sintering of ZnO varistor ceramics to realize high breakdown field: Roles of hydrated metal salts — Journal of the European Ceramic Society, 2026 — doi:10.1016/j.jeurceramsoc.2026.118641
Unipolar impulse ageing characteristics and non-uniform ageing mechanism of zinc oxide varistors — Electric Power Systems Research, 2026 — doi:10.1016/j.epsr.2026.112740
AC aging mechanism of ZnO varistors unraveled by single-grain-boundary characterization and numerical simulation — Journal of the European Ceramic Society, 2026 — doi:10.1016/j.jeurceramsoc.2026.118657
Synthesis, structure, magnetic, and electrical properties of Ni-doped bismuth titanate pyrochlores — Journal of Solid State Chemistry, 2026 — doi:10.1016/j.jssc.2026.126098
Crystal, Optical, Thermal and Dielectric Properties, XPS, and NEXAFS of Magnesium-Doped Nickel–Bismuth Stibate Pyrochlore — Crystals, 2026 — doi:10.3390/cryst16090563
NEXAFS and XPS and Structural, Electrical and Thermal Properties of Zn and Ni Codoped Bismuth Antimonate Pyrochlore — Chemistry, 2026 — doi:10.3390/chemistry8080110