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Low-temperature fabrication of titanium metal/barium titanate composite capacitors via hydrothermal method and their dielectric properties

“…Zhu, et al reported the Ti foils/BT thin film composites fabricated by a simple hydrothermal method, but the dielectric constant is relatively small (¾ r = 400) due to the geometric limitation. 18) It has not been reported on the fabrication of the metal/dielectric ceramics composites with metal particles densely distributed in dielectric layers by the wet chemical approach. We propose to fabricate Ti/BT composite compacts by chemically converted from green compacts consisting of Ti particles, BT fillers, and TiO 2 under a hydrothermal condition.…”

Hydrothermal synthesis of BaTiO3 thin films on nanoporous TiO2 covered Ti substrates

“…4). Dissolution-precipitation model is well accepted to explain the growth mechanism of hydrothermal thin films [6,13,17,25,26]. According to this model, hydrothermal thin film growth includes two stages: (1) in hydrothermal solution, after the dissolution of surface natural oxide, the Ti substrate is oxidized to form a new thin layer of oxide on the surface.…”

“…Kajiyoshi et al [16] pre-treatment of Ti substrates prior to hydrothermal synthesis is another way to increase thin film thickness. Zhu et al [17] synthesized 0.5 mm thick BaTiO 3 films after 3 weeks treatment at 200 1C by using Ti substrates that were pre-oxidized at 500 1C for 12 h in flowing oxygen. The last approach is combining hydrothermal method with other techniques such as sol-gel and electrochemical anodization method.…”

Low-Temperature Fabrication of Titanium Metal/Barium Titanate Composite Capacitors Containing Core-Shell Particles and Their Dielectric Properties

“…Since these metal/dielectric ceramics composites were usually fabricated by a conventional solid-phase synthesis including high-temperature sintering procedures, the kinds of available metal are significantly limited and, in addition, these composites need to be sintered under reduction atmosphere to avoid oxidization of metals except for noble metals. On the other hand, some research groups proposed lower-temperature fabrication processes of metal/dielectric ceramics composites by a hydrothermal electrophoresis deposition method [5][6][7]. In this method, the metal layers play a role in electrodes and react to dielectrics.…”

“…In this method, the metal layers play a role in electrodes and react to dielectrics. Thus, the metals only with two dimensional structures such as plates and foils have been demonstrated and the relatively small dielectric constant was reported for these composite capacitors due to the geometric limitation [7].…”