Synthesis Mechanism of Nano BaTiO3 Particles at Low Temperature by Molten Salt Method

Abstract

BaTiO3, a representative ferroelectric material, is used in various electronics industries. Recently, in order to create a thinner dielectric layer based on the trend of making electronic components like MLCC more light weight and smaller in size, many studies to apply nano BaTiO3 particles are being conducted 1. Although broad studies on sintering and dielectric properties are in demand with the expansion of nano dielectric particle application, the synthesis and control of the nano particles is not yet convenient, so there are no sufficient reports available. Manufacturing methods of BaTiO3 powder, including hydrothermal synthesis 2 , oxalate method 3 and solid phase method 4,5 are mainly used in the industry. Various methods to mass synthesize BaTiO3 particles of 150 nm have been commercialized. However, there is no clear synthesis method for dispersed BaTiO3 particles below approximately 20 nm, as well as no sufficient research results reported. In particular, research on nano particle synthesis using the molten salt method 6 that synthesizes nano BaTiO3 particles through the moisture absorption of water under the low temperature of around 150 ºC and atmospheric pressure is lacking.

Texturing of hydrothermally synthesized BaTiO3 in a strong magnetic field by slip casting

“…. [10,18,19,21,[31][32][33][34][35][36][37] In the case of Li-based salt systems mixed phases and even unreacted reagents were found. Hydroxide ions, in a flux for example, were said to be actively participating in the reaction.…”