Crystallization and Electrical Properties of Bi4TiO12 Films Derived from Bismuth Acetate and Bismuth Nitrate Precursor Solutions

1997 ◽  
Vol 493 ◽  
Author(s):  
Chang Jung Kim ◽  
C. W. Chung ◽  
Kyu Sang Lee
Keyword(s):  
Heat Treatment ◽  
Spin Coating ◽  
Glacial Acetic Acid ◽  
Ferroelectric Properties ◽  
Sol Gel ◽  
Bismuth Nitrate ◽  
Si Substrates ◽  
Nitrate Precursor ◽  
Coating Method ◽  
Double Heat Treatment

ABSTRACTFerroelectric Bi4Ti3O12 thin films were prepared by the sol-gel method to examine the effect of precursors on the variation of ferroelectric properties. Two kinds of Bi4Ti3O12 sol-gel precursor solutions were synthesized by dissolving bismuth acetate and bismuth nitrate in glacial acetic acid and then adding titanium acetate. The films were deposited on Pt coated Si substrates by the spin-coating method and crystallized by double heat-treatment. The Ps, the Pr, and the Ec values of the film derived from the Bi-acetate were 34.8 μC/cm2, 16.2 μC/cm2, and 128 kV/cm, respectively. The Ps, the Pr, and the Ec of the films from the Bi-nitrate were 14.2 μC/cm2, 5.7 μC/cm2, and 105 kV/cm, respectively. The Bi4T3O12 films prepared from the Bi-acetate revealed better ferroelectricity and resistivity compared to those obtained from the Bi-nitrate.

Heat treatment of spun-on acid-catalyzed sol-gel silica films

1994 ◽  
Vol 9 (3) ◽  
pp. 723-730 ◽  
Author(s):  
T.M. Parrill
Keyword(s):  
Heat Treatment ◽  
Refractive Index ◽  
Spin Coating ◽  
Compressive Strain ◽  
Sol Gel ◽  
Silica Films ◽  
Si Substrates ◽  
Acid Catalyzed ◽  
Film Porosity

SiO2 films, formed by spin coating acid-catalyzed TEOS-based sol-gel on Si substrates, were annealed at 300–1000 °C and analyzed using ellipsometry, FTIR, and in situ stress measurements. Film porosity ranged from an average of 28% before annealing to 7% after annealing 3 h at 1000 °C. Below ≍800 °C, water and silanol removal caused a decrease in refractive index and increase in the in-plane tensile stress. Infrared spectra indicated compressive strain normal to the plane, however. Above ≍800 °C, further densification and structural relaxation occurred. Exposure to H2O also caused relaxation after annealing, as the most compressed Si–O–Si units reacted preferentially with moisture.

Study on Ferroelectric Properties of Nd-Doped Bi4Ti3O12 Thin Films Prepared by Sol-Gel Method

2007 ◽  
Vol 336-338 ◽  
pp. 146-148
Author(s):  
Y.H. Sun ◽  
X.B. Liu ◽  
Min Chen ◽  
J. Liu ◽  
S. Chen ◽  
...  
Keyword(s):  
Thin Films ◽  
Spin Coating ◽  
Marked Improvement ◽  
Remanent Polarization ◽  
Bismuth Titanate ◽  
Ferroelectric Properties ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Si Substrates

Nd-doped bismuth titanate Bi4-xNdxTi3O12 (BNT) thin films were fabricated on Pt/Ti/SiO2/Si substrates by sol-gel method and spin-coating technique. The structures and the ferroelectric properties of the films were investigated. Nd doping leads to a marked improvement in the remanent polarization (Pr) and the coercive field (Ec). At the applied electric field of 260 kV/cm, Pr and Ec of the BNT film with x=0.5 annealed at 650oC are 19 μC/cm2 and 135 kV/cm, respectively. Moreover, the BNT film with x=0.5 showed a fatiguefree behavior up to 3×1010 read/write cycles.

Great enhancement of energy storage density and power density in BNBT/xBFO multilayer thin film hetero-structures

2018 ◽  
Vol 5 (9) ◽  
pp. 2300-2305 ◽  
Author(s):  
Pan Chen ◽  
Shuanghao Wu ◽  
Peng Li ◽  
Jiwei Zhai ◽  
Bo Shen
Keyword(s):  
Thin Film ◽  
Energy Storage ◽  
Spin Coating ◽  
Sol Gel ◽  
Lead Free ◽  
Energy Storage Density ◽  
Multilayer Thin Film ◽  
Storage Density ◽  
Si Substrates ◽  
Coating Method

Lead-free 0.94(Bi0.5Na0.5)0.94TiO3-0.06BaTiO3/BiFeO3 (abbreviated as BNBT/xBFO) multilayer thin film hetero-structures were deposited on Pt(111)/Ti/SiO2/Si substrates using a sol–gel/spin coating method.

Valence state and magnetism of Mn-doped PbPdO 2 nanograin film synthesized by sol-gel spin-coating method

2017 ◽  
Vol 623 ◽  
pp. 14-18 ◽  
Author(s):  
Fenglin Tang ◽  
Chao Mei ◽  
Peiyu Chuang ◽  
Tingting Song ◽  
Hailin Su ◽  
...  
Keyword(s):  
Spin Coating ◽  
Valence State ◽  
Sol Gel ◽  
Spin Coating Method ◽  
Coating Method ◽  
Mn Doped

Study on the Grain Size of Vanadium Dioxide Thin Films using Sol-gel Spin Coating Method

2018 ◽  
Author(s):  
Ibrahim Mohd Yazid ◽  
Muhammad Hazim Raselan ◽  
Shafinaz Sobihana Shariffudin ◽  
Puteri Sarah Mohamad Saad ◽  
Sukreen Hana ◽  
...  
Keyword(s):  
Thin Films ◽  
Grain Size ◽  
Vanadium Dioxide ◽  
Spin Coating ◽  
Sol Gel ◽  
Spin Coating Method ◽  
Coating Method ◽  
Vanadium Dioxide Thin Films

Acclimating the magnetic behavior of highly (117) oriented Bi4Ti 3-xMnxO12 thin films prepared sol-gel spin coating method

2020 ◽  
Author(s):  
A. Amali Roselin ◽  
N. Anandhan ◽  
I. Joseph Paneer Doss ◽  
G. Gopu ◽  
K. P. Ganesan ◽  
...  
Keyword(s):  
Thin Films ◽  
Spin Coating ◽  
Sol Gel ◽  
Magnetic Behavior ◽  
Spin Coating Method ◽  
Coating Method

Preferred Orientations for Sol-Gel Derived Plzt Thin Layers

1993 ◽  
Vol 310 ◽  
Author(s):  
Toshihiko Tani ◽  
Zhengkui Xu ◽  
David A. Payne
Keyword(s):  
Heat Treatment ◽  
Surface Energy ◽  
Sol Gel ◽  
Nucleation And Growth ◽  
Thin Layers ◽  
Energy Conditions ◽  
Chemical Characteristics ◽  
Interfacial Chemistry ◽  
Si Substrates

AbstractPLZT thin layers were deposited onto various substrates by sol-gel methods, and crystallized under different conditions and substrate treatments. Relationships are given for the chemical characteristics of the substrate's surface and the preferred orientations which develop on heat treatment. A preferred (111) orientation always developed for perovskite crystallized on Pt layers which contained Ti on the surface. This was attributed to the formation of Pt3Ti and the role of heteroepitaxial nucleation and growth sites. In addition, a preferred (100) orientation was also obtained on unannealed Pt/Ti/SiO2/Si substrates which were free of Ti on the surface. This was attributed to self-textured growth with flat faces striving for minimum surface energy conditions. The results are discussed in terms of the importance of interfacial chemistry on the control of texture for crystallization of PLZT thin layers on coated substrates.

Sol-Gel Derived Titania/Hydroxyapatite Layer on Titanium Substrate

2011 ◽  
Vol 117-119 ◽  
pp. 332-334 ◽  
Author(s):  
Wen Yan Wang ◽  
Yu Wu ◽  
Jing Pei Xie ◽  
Gao Lu ◽  
Xiao Ming Dong ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Surface Quality ◽  
Phase Formation ◽  
Volume Fraction ◽  
Sol Gel ◽  
Calcium Nitrate ◽  
Titanium Substrate ◽  
Gel Method ◽  
Good Surface ◽  
Coating Method

In this study, calcium nitrate(Ca(NO3)2•4H2O) and phosphorus pentoxide(P2O5) were used as precursor to prepare hydroxyapatite(HA) layer by sol-gel method, followed by a dipping-coating method to coat HA layer onto Ti. Phase formation and microstructure were investigated by XRD and SEM to study the influence of atmosphere on the property of HA layer. The results revealed that there exists no large cracks in the layer which was heated in the nitrogen, leading to a good surface quality compared with the layer which was heated in the air. And there is no obvious difference in crystallinity and volume fraction of HA in the layer when adopting heat treatment in different atmospheres.

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