Effect of MnO₂on the dielectric properties of Nb‐doped BaTiO₃‐(Bi_0.5Na_0.5)TiO₃ceramics for X9RMLCCapplications

Abstract

MnO 2 and Nb 2 O 5 co-doped 0.9BaTiO 3 -0.1(Bi 0.5 Na 0.5 )TiO 3 powders with excellent dielectric properties were fabricated using a conventional solid-state reaction method and sand milling. The doping effects of various amounts of MnO 2 on the dielectric properties were investigated. The results revealed that the dielectric properties greatly depended on the concentration of MnO 2 . All the ceramics met the X9R specification. The dielectric loss decreased with an increasing concentration of MnO 2 . The specimen with an appropriate amount of 0.2 mol% MnO 2 exhibited the most enhanced properties: high insulation resistance (2.49 × 10 13 Ω/ cm) and improved degradation properties. Multilayer ceramic capacitor (MLCC) chips were prepared by tape casting using a 0.2 mol% Mn-doped 9010BTBNTbased ceramic powder. The capacitance of the MLCC chip was approximately 100 nF, and the dielectric loss was approximately 1.75% at room temperature.The high-temperature accelerated lifetime was over 1000 hours under 250 V (five times the working voltage) and at 230°C, indicating that the MLCC chips possess superior reliability. K E Y W O R D Score-shell structure, dielectric properties, high-temperature accelerated lifetime test, multilayer ceramic capacitor, tape casting, X9R

Development of Yttrium-Doped BaTiO3 for Next-Generation Multilayer Ceramic Capacitors

“…These properties, including thermal conductivity and heat capacity, play a significant role in the design and efficiency of many applications, particularly in thermal management in the optoelectronic industries and phase transition materials. , In addition, evaluating the mechanical properties, such as compressive strength of MLCCs is necessary to understand the internal stresses imposed on the MLCCs and to extend their lifetime. BaTiO 3 has also been used in a range of electro-optic systems due to its excellent optical characteristics, including highly sensitive photodetectors, second harmonic generators, light sensors, and optical signal processing. , By altering the content of yttrium (Y) in Ba 1– x Y x TiO 3 ceramic materials, it is possible to modify the physical characteristics and energy band gap of the material, potentially expanding its potential technological applications.…”

“…BaTiO 3 has also been used in a range of electro-optic systems due to its excellent optical characteristics, including highly sensitive photodetectors, second harmonic generators, light sensors, and optical signal processing. 27,28 By altering the content of yttrium (Y) in Ba 1−x Y x TiO 3 ceramic materials, it is possible to modify the physical characteristics and energy band gap of the material, potentially expanding its potential technological applications.…”

Effect of Ho‐Dy co‐doping on the electrical properties and reliability of BaTiO3‐based nanoceramics for Base Metal Electrode Multilayer Ceramic Capacitor

“…Numerous researches have been done to synthesize nonreducible BaTiO 3 ‐based ceramics 1–3 . The introduction of an acceptor dopant, especially the multivalent acceptor like Mn, reduces the concentration of electrons and thus increases the insulation resistance (IR) 4–6 . Meanwhile, the insulation characteristic of ceramics sintered under a reducing atmosphere can be prominently improved after reoxidation, due to the decrease of oxygen vacancies concentration 7–9 .…”

“…[1][2][3] The introduction of an acceptor dopant, especially the multivalent acceptor like Mn, reduces the concentration of electrons and thus increases the insulation resistance (IR). [4][5][6] Meanwhile, the insulation characteristic of ceramics sintered under a reducing atmosphere can be prominently improved after reoxidation, due to the decrease of oxygen vacancies concentration. [7][8][9] The degradation behavior of BaTiO 3 -based ceramics is closely related to the volume fraction of grain boundary, [10][11][12] which indicates that small grain size is preferred for superior reliability.…”

Ultrahigh Energy-Storage Density of BaTiO3-Based Ceramics via the Interfacial Polarization Strategy

“…As a typical ferroelectric material, barium titanate (BaTiO 3 , BT) based ceramics have been extensively studied because of their promising characteristics, such as low dielectric loss, high dielectric constant, and moderate E b . , However, the square P–E loop of pure BT results in very low W rec and η, which cannot be used directly for energy storage. Therefore, researchers have focused on enhancing its energy-storage properties utilizing composition modification.…”