Effects of Ethanol Addition and Ba/Ti Ratios on Preparation of Barium Titanate Nanocrystals Via a Spray Pyrolysis Method
2006; Wiley; Volume: 89; Issue: 3 Linguagem: Inglês
10.1111/j.1551-2916.2005.00892.x
ISSN1551-2916
AutoresWei‐Ning Wang, I. Wuled Lenggoro, Kikuo Okuyama, Yoshitake Terashi, Yu‐Cong Wang,
Tópico(s)Semiconductor materials and devices
ResumoBaTiO 3 nanocrystals were synthesized by using a low‐pressure spray pyrolysis (SP) method. A new strategy was proposed to improve nanocrystal formation and phase evolution by ethanol addition and Ba/Ti molar ratio variation, respectively. A mixture of submicron and nanoparticles was found with SP of precursors without ethanol addition, while only nanoparticles could be obtained by ethanol addition. BaTiO 3 crystal growth was improved by increasing the Ba/Ti ratio. In comparison, SP of the same precursor under atmospheric conditions resulted in only submicron particles with smooth surfaces and irregular morphology.
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