A novel precipitation-based synthesis for the formation of X8R-type dielectrics composition based on monodispersed submicron Ba0.991Bi0.006TiO3@Nb2O5 particles. Issue 9 (September 2015)

• Record Type: Journal Article
• Authors: Liu, Yu; Cui, Bin; Wang, Yan; Zhao, Xiaotong; Yan, Qiangqiang; Wu, Tong; Zhao, Lili; Wang, Yaoyu
• Is Part Of: Journal of the European Ceramic Society. Volume 35:Issue 9(2015:Sep.)
• Page Start: 2461
• Page End: 2469
• Publication Date: 2015-09
• Subjects: Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2015.03.024
• Languages: English
• ISSNs: 0955-2219

Abstract

<abstract abstract-type="author" id="abs0005"> <title id="sect0005">Abstract</title> <sec> <p id="spar0005">To meet the needs of future multilayer ceramic capacitors (MLCCs), thinner dielectric layers are necessary. To achieve this goal, the grain size and uniformity of the MLCC particles must be effectively controlled. In this study, we developed a novel precipitation route to control the dispersion and particle size of Ba_0.991Bi_0.006TiO₃ and Ba_0.991Bi_0.006TiO₃@Nb₂O₅ particles. We confirmed a core–shell particle structure by means of X-ray diffraction, scanning electron microscopy, and energy-dispersive spectroscopy. The dielectric properties of the ceramics were measured using an LCR meter. We found monodispersed submicron Ba_0.991Bi_0.006TiO₃ particles (∼233 nm) form a core that was coated with a homogeneous Nb₂O₅ layer (∼7 nm). Dense, fine-grained Ba_0.991Bi_0.006TiO₃-based ceramics (≤250 nm) were obtained by sintering. The ceramics met the X8R requirements, with a Curie temperature of about 140 °C, a maximum dielectric constant of 2336, and a low dielectric loss at room temperature (&lt;2.0%, with a minimum of 0.5%).</p> </sec> </abstract>