BaTiO3 ceramics are one ofthe most widely used materials in the electronic industry, especially in Multi Layer Ceramic Capacitors(MLCCs) , because of their high dielectric constant. The advances in microelectronic packaging and communication technologies necessitate the ultra-hig h capacity of the MLCC. And in microelectronics and communications have led to the miniaturization and integration of MLCCs in electronic devices. The BaTiO3 nano-sized particles were usually produced by the solid-state reaction of BaCO3 with TiO2 at high temperature a bove 900 oC. However, this method leads to formation of large BaTiO3 nano-sized particles with uncontrolled and irregular morphology. So, the nanopaticles are synthesized via various wet chemical routes. 1n various method for synthesizing BT the hydrothermal method is especially advantageous to produce nanocrystalline BT particles. Owing to synthesize high crystalline BaTiO3 particles via hydrothermal reaction , high pH (~ 1 3) is ess ential. Generally, KOH, NaOH and ammonia are used to increase the pH. Especially, ammonia has been preferred due to advantage for wasing the as-synthesized BaTiO3 particles. Our works focus
on the role of ammonia for synthesis of high crystalline BaTiO3 powders via hydrothermal route except increasing the pH.