scholarly journals Tuning shape of barium titanate nanocubes by combination of oleic acid/tert-butylamine through hydrothermal process

2016 ◽  
Vol 655 ◽  
pp. 71-78 ◽  
Author(s):  
Qiang Ma ◽  
Ken-ichi Mimura ◽  
Kazumi Kato
Keyword(s):  
Oleic Acid ◽  
Barium Titanate ◽  
Hydrothermal Process ◽  
Tert Butylamine

Unusual Reuniting of Barium Titanate Nanoparticles

2010 ◽  
Vol 434-435 ◽  
pp. 860-862
Author(s):  
Xiao Quan Zhang ◽  
Xiao Hui Wang ◽  
Tie Yu Sun ◽  
Ai Li Cui ◽  
Long Tu Li
Keyword(s):  
Oleic Acid ◽  
Nitric Acid ◽  
Barium Titanate ◽  
Elaidic Acid ◽  
Solvothermal Method ◽  
Raw Materials ◽  
Tetrabutyl Titanate ◽  
Barium Acetate ◽  
Self Assembling ◽  
Barium Titanate Nanoparticles

A solvothermal method to synthesize barium titanate nanoparticles is employed. In this method many raw materials such as oleic acid, surfactant, sodium hydroxide, alkali barium acetate, alcohol, tetrabutyl titanate are used. When the samples are collected, oleic acid which has mush an account will cover the whole particles. To make the samples cleaner, nitric acid is used to transition oleic acid to elaidic acid which is lighter than water then it will float up to be removed. In the progress to wash off the oleic acid the particles were found to reunite unusually: bigger and cubic particles are formed and the shape seems like single crystal but they are reunitions indeed, we used HTEM to prove this. It means self–assembling might happen through the progress, the spontaneous polarization orient, polarity of molecules will affect this progess.

Synthesis and Characterization of Barium Titanate Nano-Powders by the Hydrothermal Process

2006 ◽  
Vol 301 ◽  
pp. 219-222 ◽  
Author(s):  
Kouji Tokita ◽  
Shigeki Sato
Keyword(s):  
Particle Size ◽  
Barium Titanate ◽  
Hydrothermal Process ◽  
Tio2 Particle ◽  
Nano Particles ◽  
Axis Length ◽  
Average Size ◽  
Source Materials ◽  
Perovskite Lattice

Barium titanate (BaTiO3) nano-particles with high crystalinity were synthesized by hydrothermal process using Ba(OH)2·8H2O and TiO2 as source materials. The average size of the synthesized BaTiO3 particles decreased as the TiO2 particle size decreased. The amount of hydroxide ions incorporated into the perovskite lattice decreased as the BaTiO3 particle size increased and then became constant above 50 nm. Moreover, the ratio of the c- to a-axis length increased when the BaTiO3 particle size was above 50 nm. Sintered ceramics with a grain size smaller than 100 nm were obtained by using highly crystallized hydrothermal BaTiO3 particles.

Properties of Barium Titanate Thin Films Grown by Sol–Gel-Hydrothermal Process

2014 ◽  
Vol 20 (5) ◽  
pp. 1143-1146 ◽  
Author(s):  
Savita Sharma ◽  
Monika Tomar ◽  
Ashok Kumar ◽  
Nitin K. Puri ◽  
Vinay Gupta
Keyword(s):  
Thin Films ◽  
Barium Titanate ◽  
Sol Gel ◽  
Hydrothermal Process

Powder and Dielectric Characterization of Hydrothermally Synthesized Barium Titanate Nanopowders

2006 ◽  
Vol 320 ◽  
pp. 143-146 ◽  
Author(s):  
Kouji Tokita ◽  
Shigeki Sato
Keyword(s):  
Grain Size ◽  
Barium Titanate ◽  
Hydrothermal Process ◽  
Synthesis Temperature ◽  
Core Shell ◽  
Dielectric Characterization ◽  
Core Shell Structure ◽  
Average Size ◽  
Uniform Composition

Barium titanate (BaTiO3) particles with average size of smaller than 100 nm were synthesized by a hydrothermal process at 100°C to 300°C. The c- to a-axis ratios of the particles increased as the synthesis temperature increased. Disk capacitors were fabricated with as-synthesized particles and some additives to obtain X7R capacitors. The temperature coefficient of capacitance with particles synthesized at 100°C was much larger than that for 300°C, indicating that the former had uniform composition in the grain while the latter had a core-shell structure. This data show that barium titanate particles hydrothermally synthesized at high temperature are useful when creating the X7R capacitors with small grain size.

Synthesis and Characterization of Nano-Barium Titanate Prepared by Hydrothermal Process

2010 ◽  
Vol 115 (1) ◽  
pp. 142-148 ◽  
Author(s):  
N. J. Joshi ◽  
G. S. Grewal ◽  
V. Shrinet ◽  
A. Pratap ◽  
N. J. Buch
Keyword(s):  
Barium Titanate ◽  
Hydrothermal Process ◽  
Synthesis And Characterization
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