ChemInform Abstract: Preparation of Barium Titanate and Related Materials by the Alkoxide—Hydroxide Method.

Abstract

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Effects of Reaction Medium on the Phase Synthesis and Particle Size Evolution of BaTiO3

“…The morphology of the powder has therefore been difficult to predict, due to uncontrollable grain growth and sintering effects at higher temperatures. Alternatively, the alkoxide–hydroxide sol precipitation route is known to yield crystalline BaTiO 3 below 100°C 5–8 . Essentially, titanium (Ti)(IV) alkoxide is added drop‐wise to an aqueous basic solution of barium hydroxide with pH>11, adjusted by KOH.…”

Synthesis of Monodispersed Barium Titanate Nanoparticles with Narrow Size Distribution by a Modified Alkoxide‐Hydroxide Sol‐Precipitation Method

“…The conventional method to synthesis of BaTiO 3 particles is the solid‐state reaction. The raw materials (BaCO 3 and TiO 2 ) are mixed, ball milled, and then calcined at a high temperature to form perovskite barium titanate 12–13 . However, it is difficult to avoid the aggregates between the particles and the abnormal grain growth during the ball milling and calcining process, which usually causes the large particle size and nonhomogenous size distribution.…”

“…Many researchers have been working on new methods to overcome these problems, among which the alkoxide‐hydroxide sol‐precipitation method attracted much attention 4,13–16 . Generally, the process is as follows.…”

Synthesis, spark plasma sintering and electrical conduction mechanism in BaTiO3–Cu composites

“…[19][20][21][22][23][24] The main merit of the alkoxide-hydroxide route is the rather simple approach to form crystalline BaTiO 3 nanoparticles at low temperatures well below 100 • C without the need of any further calcination treatments. It is believed that a rationally modified synthetic route can also be adapted for the preparation of BaTiO 3 -Cu composite powders.…”