Effects of Ethanol Addition and Ba/Ti Ratios on Preparation of Barium Titanate Nanocrystals Via a Spray Pyrolysis Method

• Published in: Journal of the American Ceramic Society Vol. 89; no. 3; pp. 888 - 893
• Main Authors: Wang, Wei-Ning, Wuled Lenggoro, I., Okuyama, Kikuo, Terashi, Yoshitake, Wang, Yu-Cong
• Format: Journal Article
• Language: English
• Published: Malden, USA Blackwell Publishing Inc 01.03.2006; Blackwell; Wiley Subscription Services, Inc
• Subjects: Barium titanates; Cross-disciplinary physics: materials science; rheology; Crystal growth; Ethanol; Ethyl alcohol; Exact sciences and technology; Materials science; Nanocrystalline materials; Nanocrystals; Nanoparticles; Nanoscale materials and structures: fabrication and characterization; Physics; Precursors; Spray pyrolysis; Scanning electron microscopy; Pyrolysis; Additives; Inorganic compounds; Ethanol; Sprays; Composition effect; Titanates; Barium titanates; XRD; Experimental study; Field emission electron microscopy; Chemical preparation; Low pressure; Nanocrystal
• ISSN: 0002-7820; 1551-2916
• DOI: 10.1111/j.1551-2916.2005.00892.x

BaTiO3 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. BaTiO3 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.