本研究探討了，使用高還原焓之CaZrO3摻雜，和受體施體MnNb2O6共摻雜對BaTiO3介電陶瓷在還原氣氛燒結過程中，氧空缺生成及其介電性能的影響。透過一系列先進的表徵技術，包括X射線衍射、X射線光電子能譜、掃描電子顯微鏡、穿透式電子顯微鏡、高阻計以及電化學交流阻抗分析系統，探討摻雜不同濃度的CaZrO3和MnNb2O6，對還原氣氛（1%H₂/99%N₂）下燒結之BaTiO3陶瓷體結晶相，微結構及介電性質之影響。研究結果顯示，CaZrO3和MnNb2O6的摻雜，有效地抑制了氧空缺的生成，從而減少了電子導電率，同時也降低了介電損耗、增強絕緣電阻及降低了在高溫作用下之漏電流。並且保持優異的溫度穩定性，符合X7R規範的要求(在-55°C至125°C的廣泛溫度範圍內，電容變化率保持在±15%以內)，改善了BaTiO3陶瓷的介電性能。由XPS分析結果顯示，CaZrO3和MnNb2O6的摻雜導致氧空缺和Ti3+ 濃度的顯著減少，高溫阻抗分析指出，在高溫下，晶粒與晶界的導電活化能顯著增加。此外透過熱激活去極化電流分析，我們觀察到在高溫下漏電流顯著的降低，進一步證實了CaZrO3和MnNb2O6摻雜可提升BaTiO3陶瓷在還原燒結氣氛下之抗還原能力。
總體而言，本研究不僅深入揭示了CaZrO3和MnNb2O6摻雜，在提高還原氣氛下燒結BaTiO3陶瓷的介電性能與可靠性，為開發適用於先進電子應用中的高可靠性電容器材料提供了堅實的科學基礎。

This study investigates the effects of doping BaTiO₃ dielectric ceramics with CaZrO₃ and MnNb₂O₆ during the sintering process in a reducing atmosphere. Advanced characterization techniques, including X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resistance measurement, and electrochemical impedance spectroscopy (EIS), were employed to systematically analyze the impacts of varying concentrations of CaZrO₃ and MnNb₂O₆ on the crystalline phase, microstructure, and dielectric properties of BaTiO₃ ceramics sintered in a 1% H₂/99% N₂ reducing atmosphere.
The results demonstrate that doping with CaZrO₃ and MnNb₂O₆ effectively suppresses the formation of oxygen vacancies, significantly reducing electronic conductivity, dielectric loss, and leakage current at high temperatures, while enhancing insulation resistance. The doped BaTiO₃ ceramics exhibit exceptional temperature stability, fully complying with the X7R specification, maintaining a capacitance variation within ±15% over a wide temperature range from -55°C to 125°C. The dielectric properties of BaTiO₃ ceramics are substantially improved by doping with CaZrO₃ and MnNb₂O₆, which markedly reduces the concentrations of oxygen vacancies and Ti³⁺ ions. Furthermore, the activation energy for conduction in both grains and grain boundaries increases significantly at high temperatures. The considerable reduction in high-temperature leakage current further confirms the enhanced reduction resistance of BaTiO₃ ceramics doped with CaZrO₃ and MnNb₂O₆ during the sintering process in a reducing atmosphere.

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