Preparation and optical nonlinear properties of PLT ceramic films by sol-gel process

AbstractLithium tantalate (LiTaO3)/PZT ceramic films with thickness above 50 µm have been deposited on stainless steel substrates using a modified sol-gel process. LT powders are dispersed in a PZT sol-gel matrix to form 0-3 ceramic/ceramic composites. The dielectric and impedance response of the LiTaO3/PZT films supported by the substrates has been studied. The pulse echo response of the films as ultrasonic transducers demonstrates a broadband frequency response. The transducers can operate at least up to a temperature of 368°C.

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Preparation and properties of ZnO-based ceramic films for low-voltage varistors by novel sol-gel process

Materials Science and Engineering B ◽

10.1016/s0921-5107(01)00688-2 ◽

2001 ◽

Vol 86 (3) ◽

pp. 232-236 ◽

Cited By ~ 33

Author(s):

Yanqiu Q. Huang ◽

Liu Meidong ◽

Zeng Yike ◽

Li Churong ◽

Xia Donglin ◽

...

Keyword(s):

Low Voltage ◽

Sol Gel ◽

Ceramic Films ◽

Sol Gel Process

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Raman spectroscopy study of ZnO-based ceramic films fabricated by novel sol–gel process

Materials Science and Engineering B ◽

10.1016/s0921-5107(02)00396-3 ◽

2003 ◽

Vol 97 (2) ◽

pp. 111-116 ◽

Cited By ~ 190

Author(s):

Yanqiu Huang ◽

Meidong Liu ◽

Zhen Li ◽

Yike Zeng ◽

Shaobo Liu

Keyword(s):

Raman Spectroscopy ◽

Sol Gel ◽

Spectroscopy Study ◽

Ceramic Films ◽

Sol Gel Process

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Effect of annealing temperature of a novel Sol–gel process on the electrical properties of low voltage ZnO-based ceramic films

Materials Science and Engineering B ◽

10.1016/j.mseb.2004.12.049 ◽

2005 ◽

Vol 117 (3) ◽

pp. 317-320 ◽

Cited By ~ 12

Author(s):

Shenglin Jiang ◽

Haibo Zhang ◽

Yanqiu Huang ◽

Meidong Liu ◽

Ruzhan Lin

Keyword(s):

Electrical Properties ◽

Annealing Temperature ◽

Low Voltage ◽

Sol Gel ◽

Ceramic Films ◽

Sol Gel Process

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The crystallization of thin-film ceramics

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100122095 ◽

1992 ◽

Vol 50 (1) ◽

pp. 338-339

Author(s):

J.M. Schwartz ◽

L.F. Francis ◽

L.D. Schmidt ◽

P.S. Schabes-Retchkiman

Keyword(s):

Thin Films ◽

Grain Size ◽

Sol Gel ◽

Processing Route ◽

Small Areas ◽

Ceramic Thin Films ◽

Complex Shapes ◽

Sol Gel Process ◽

Ceramic Precursors ◽

Crystalline Ceramic

Ceramic thin films and coatings are of interest for electrical, optical, magnetic and thermal barrier applications. Critical for improved properties in thin films is the development of specific microstructures during processing. To this end, the sol-gel method is advantageous as a versatile processing route. The sol-gel process involves depositing a solution containing metalorganic or colloidal ceramic precursors onto a substrate and heating the deposited layer to form a crystalline or non-crystalline ceramic coating. This route has several advantages, including the ability to create tailored microstructures and properties, to coat large or small areas, simple or complex shapes, and to more easily prepare multicomponent ceramics. Sol-gel derived coatings are amorphous in the as-deposited state and develop their crystalline structure and microstructure during heat-treatment. We are particularly interested in studying the amorphous to crystalline transformation, because many key features of the microstructure such as grain size and grain size distribution may be linked to this transformation.

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Phase separation in sol gel-derived ceramic films of silica-zirconia, alumina-zirconia, and titania-zirconia system

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100170967 ◽

1994 ◽

Vol 52 ◽

pp. 646-647

Author(s):

J. Tong ◽

L. Eyring

Keyword(s):

Fracture Toughness ◽

Phase Separation ◽

Sol Gel ◽

Great Influence ◽

High Strength ◽

Chemical Durability ◽

Separation Method ◽

Toughening Mechanism ◽

Ceramic Films ◽

Zirconia Toughened Alumina

There is increasing interest in composites containing zirconia because of their high strength, fracture toughness, and its great influence on the chemical durability in glass. For the zirconia-silica system, monolithic glasses, fibers and coatings have been obtained. There is currently a great interest in designing zirconia-toughened alumina including exploration of the processing methods and the toughening mechanism.The possibility of forming nanocrystal composites by a phase separation method has been investigated in three systems: zirconia-alumina, zirconia-silica and zirconia-titania using HREM. The morphological observations initially suggest that the formation of nanocrystal composites by a phase separation method is possible in the zirconia-alumina and zirconia-silica systems, but impossible in the zirconia-titania system. The separation-produced grain size in silica-zirconia system is around 5 nm and is more uniform than that in the alumina-zirconia system in which the sizes of the small polyhedron grains are around 10 nm. In the titania-zirconia system, there is no obvious separation as was observed in die alumina-zirconia and silica-zirconia system.

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Epitaxial Growth of Sr0.3Ba0.7Nb2O6 Thin Films Prepared by Sol-Gel Process

MRS Proceedings ◽

10.1557/proc-606-181 ◽

1999 ◽

Vol 606 ◽

Cited By ~ 2

Author(s):

Keishi Nishio ◽

Jirawat Thongrueng ◽

Yuichi Watanabe ◽

Toshio Tsuchiya

Keyword(s):

Thin Film ◽

Thin Films ◽

Epitaxial Growth ◽

Raw Materials ◽

Substrate Surface ◽

Sol Gel ◽

Tungsten Bronze ◽

Monomethyl Ether ◽

Tetragonal Tungsten Bronze ◽

Sol Gel Process

AbstructWe succeeded in the preparation of strontium-barium niobate (Sr0.3Ba0.7Nb2O6 : SBN30)that have a tetragonal tungsten bronze type structure thin films on SrTiO3 (100), STO, or La doped SrTiO3 (100), LSTO, single crystal substrates by a spin coating process. LSTO substrate can be used for electrode. A homogeneous coating solution was prepared with Sr and Ba acetates and Nb(OEt)5 as raw materials, and acetic acid and diethylene glycol monomethyl ether as solvents. The coating thin films were sintered at temperature from 700 to 1000°C for 10 min in air. It was confirmed that the thin films on STO substrate sintered above 700°C were in the epitaxial growth because the 16 diffraction spots were observed on the pole figure using (121) reflection. The <130> and <310> direction of the thin film on STO were oriented with the c-axis in parallel to the substrate surface. However, the diffraction spots of thin film on LSTO substrate sintered at 700°C were corresponds to the expected pattern for (110).

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UV Curable Organic-Inorganic Hybrid Materials

MRS Proceedings ◽

10.1557/proc-628-cc6.14 ◽

2000 ◽

Vol 628 ◽

Cited By ~ 1

Author(s):

Guang-Way Jang ◽

Ren-Jye Wu ◽

Yuung-Ching Sheen ◽

Ya-Hui Lin ◽

Chi-Jung Chang

Keyword(s):

Hybrid Materials ◽

Colloidal Silica ◽

Sol Gel ◽

Solution Ph ◽

Uv Curable ◽

Inorganic Hybrid ◽

Degradation Temperature ◽

Sol Gel Process ◽

The Stability ◽

Thermal Degradation Temperature

This work successfully prepared an UV curable organic-inorganic hybrid material consisting of organic modified colloidal silica. Applications of UV curable organic-inorganic hybrid materials include abrasion resistant coatings, photo-patternable thin films and waveguides. Colloidal silica containing reactive functional groups were also prepared by reacting organic silane and tetraethyl orthosilicate (TEOS) using sol-gel process. In addition, the efficiency of grafting organic moiety onto silica nanoparticles was investigated by applying TGA and FTIR techniques. Experimental results indicated a strong interdependence between surface modification efficiency and solution pH. Acrylate-SiO2 hybrid formation could result in a shifting of thermal degradation temperature of organic component from about 200°C to near 400°C. In addition, the stability of organic modified colloidal silica in UV curable formula and the physical properties of resulting coatings were discussed. Furthermore, the morphology of organic modified colloidal silica was investigated by performing TEM and SEM studies‥

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Halogenation of ORMOSIL: A Promising Rout for Tailoring Optical Absorptions

MRS Proceedings ◽

10.1557/proc-771-l4.1 ◽

2003 ◽

Vol 771 ◽

Author(s):

Amir Fardad ◽

Wei Liang ◽

Yadong Zhang ◽

Bryson Case ◽

Shibin Jiang ◽

...

Keyword(s):

Process Parameters ◽

Sol Gel ◽

Fiber Amplifiers ◽

Grignard Reaction ◽

Coupling Loss ◽

Beam Splitters ◽

Silicon Technology ◽

Sol Gel Process ◽

Propagation Losses ◽

Signal Intensities

AbstractFluorinated and photo-imageable precursors are synthesized through a Barbier-Grignard reaction for 1550-nm window. The precursors are used for the sol-gel process of integrated optic components for silica-on-silicon technology. Material compositions and process parameters are optimized to achieve internal absorptions >0.1 dB/cm and propagation losses of about 0.5 dB/cm at 1550 nm. Compact 1×16 Beam splitters are designed and fabricated which exhibit >0.3 dB power uniformity, >0.1 dB PDL and 1.5 dB coupling loss. By hybrid integration of the passive splitters and in-house fiber amplifiers, amplifying splitters are demonstrated at various signal intensities.

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