Highly flexible and optical transparent 6F-PI/TiO2optical hybrid films with tunable refractive index and excellent thermal stability

2010 ◽  
Vol 20 (3) ◽  
pp. 531-536 ◽  
Author(s):  
Guey-Sheng Liou ◽  
Po-Han Lin ◽  
Hung-Ju Yen ◽  
Yang-Yen Yu ◽  
Tsung-Wei Tsai ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Refractive Index ◽  
Hybrid Films ◽  
Excellent Thermal Stability ◽  
Tunable Refractive Index

Highly transparent and flexible polyimide/ZrO2 nanocomposite optical films with a tunable refractive index and Abbe number

2015 ◽  
Vol 51 (70) ◽  
pp. 13523-13526 ◽  
Author(s):  
Chia-Liang Tsai ◽  
Guey-Sheng Liou
Keyword(s):  
Refractive Index ◽  
Optical Transparency ◽  
Hybrid Films ◽  
Optical Films ◽  
Tunable Refractive Index

The obtained PI/ZrO2 hybrid films revealed excellent optical transparency, a tunable refractive index and an Abbe number of 1.804 and 32.18, respectively.

Cross-linkable Highly Fluorinated Polymers with Tunable Refractive Index

2005 ◽  
Vol 888 ◽  
Author(s):  
Yinghua Qi ◽  
Jia Jiang ◽  
Claire L. Callender ◽  
Jianfu Ding ◽  
Michael Day
Keyword(s):  
Thermal Stability ◽  
Refractive Index ◽  
Optical Loss ◽  
Calcium Hydride ◽  
Good Thermal Stability ◽  
Arylene Ether ◽  
Cesium Fluoride ◽  
Ether Ketone ◽  
Tunable Refractive Index ◽  
Optical Waveguiding

ABSTRACTNovel cross-linkable, highly fluorinated poly(arylene ether ketone/sulfone)s have been prepared by copolycondensation reactions of a perfluorinated aromatic ketone or sulfone with 4,4'-(hexafluoroisopropylidene)diphenol (6F-BPA)/4,4'-isopropylidene bis(2,6-dibromophenol) (4Br-BPA) and a tetrafluorostyrol-containing bisphenol, at low temperature in the presence of calcium hydride and cesium fluoride. Property investigations have shown that these polymers can be easily processed into thin films, have good thermal stability, and exhibit low optical loss at 1550 nm (0.4 – 0.5 dB/cm). The refractive index can be tailored over a range of 1.50 to 1.57, allowing the polymers to be used as both core and cladding materials in optical waveguiding applications.

scholarly journals Transparent, High Glass-Transition Temperature, Shape Memory Hybrid Polyimides Based on Polyhedral Oligomeric Silsesquioxane

Polymers ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1058 ◽  
Author(s):  
Zhongxu Lan ◽  
Xueli Chen ◽  
Xiao Zhang ◽  
Chongyu Zhu ◽  
Yanlei Yu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Hybrid Films ◽  
Excellent Thermal Stability ◽  
Optically Transparent ◽  
Oligomeric Silsesquioxane

Optically transparent polyimides with excellent thermal stability and shape memory effect have potential applications in optoelectronic devices and aerospace industries. A series of optically transparent shape memory polyimide hybrid films are synthesized from 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (6FDA) and 2,2′-bis-(trifluoromethyl)biphenyl-4,4′-diamine (TFMB) with various polyhedral oligomeric silsesquioxane (POSS) contents and then subjected to thermal imidization. The hybrid films show good optical transparency (>80% at 400 nm and >95% at 500 nm) with cutoff wavelengths ranging from 318 to 336 nm. Following the incorporation of the inorganic POSS structure, the hybrid films exhibit excellent thermal stability with glass transition temperature (Tg) ranging from 351 to 372 °C. The hybrid films possess the highest Tg compared with the previously-reported shape memory polymers. These findings show that POSS is successfully utilized to develop transparent polyimides with excellent thermal stability and shape memory effect.

Light emitting diodes (LEDs) encapsulation of polymer composites based on poly(propylene fumarate) crosslinked with poly(propylene fumarate)-diacrylate

RSC Advances ◽  
2015 ◽  
Vol 5 (65) ◽  
pp. 52888-52895 ◽  
Author(s):  
Liang Wang ◽  
Da-Gang Guo ◽  
Hui Zhu ◽  
Lei Xie
Keyword(s):  
Thermal Stability ◽  
Tensile Strength ◽  
Refractive Index ◽  
Polymer Composites ◽  
Light Emitting Diodes ◽  
Polymer Networks ◽  
Excellent Thermal Stability ◽  
Light Emitting ◽  
High Transparency ◽  
Poly Propylene

The cured PPF/PPF-DA polymer networks material can be used as a LEDs encapsulant, owing to suitable refractive index, high transparency, appropriate tensile strength, and excellent thermal stability.

Transparent epoxy/TiO 2 optical hybrid films with tunable refractive index prepared via a simple and efficient way

2018 ◽  
Vol 120 ◽  
pp. 252-259 ◽  
Author(s):  
Shaomin Dan ◽  
Huimin Gu ◽  
Jiaojun Tan ◽  
Baoliang Zhang ◽  
Qiuyu Zhang
Keyword(s):  
Refractive Index ◽  
Hybrid Films ◽  
Tunable Refractive Index

Microstructure studies of tungsten silicide schottky contacts on Gaas

1987 ◽  
Vol 45 ◽  
pp. 328-329
Author(s):  
Yih-Cheng Shih ◽  
E. L. Wilkie
Keyword(s):  
Thermal Stability ◽  
Field Effect Transistors ◽  
Schottky Contact ◽  
Schottky Contacts ◽  
Excellent Thermal Stability ◽  
Barrier Heights ◽  
Gaas Substrates ◽  
Film Adhesion ◽  
Threshold Voltages ◽  
Thermal Stability Of

Tungsten silicides (WSix) have been successfully used as the gate materials in self-aligned GaAs metal-semiconductor-field- effect transistors (MESFET). Thermal stability of the WSix/GaAs Schottky contact is of major concern since the n+ implanted source/drain regions must be annealed at high temperatures (∼ 800°C). WSi0.6 was considered the best composition to achieve good device performance due to its low stress and excellent thermal stability of the WSix/GaAs interface. The film adhesion and the uniformity in barrier heights and ideality factors of the WSi0.6 films have been improved by depositing a thin layer of pure W as the first layer on GaAs prior to WSi0.6 deposition. Recently WSi0.1 has been used successfully as the gate material in 1x10 μm GaAs FET's on the GaAs substrates which were sputter-cleaned prior to deposition. These GaAs FET's exhibited uniform threshold voltages across a 51 mm wafer with good film adhesion after annealing at 800°C for 10 min.

scholarly journals Boosted piezoelectricity with excellent thermal stability in tetragonal NaNbO3-based ceramics

2020 ◽  
Author(s):  
Lu Wang ◽  
Shengdong Sun ◽  
Huajie Luo ◽  
Yang Ren ◽  
Hui Liu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Temperature Stability ◽  
Lead Free ◽  
Excellent Thermal Stability ◽  
Lead Free Ceramics ◽  
Piezoelectric Performance

The realization of high piezoelectric performance and excellent temperature stability simultaneously in lead-free ceramics is the key for replacing Pb-containing perovskites in industry. In this study, large piezoelectric performance (d33...

scholarly journals The influence of an ultra-high resistivity Ta underlayer on perpendicular magnetic anisotropy in Ta/Pt/Co/Pt heterostructures

RSC Advances ◽  
2020 ◽  
Vol 10 (19) ◽  
pp. 11219-11224
Author(s):  
Wei Zhang ◽  
Xiaoxiong Jia ◽  
Rui Wang ◽  
Huihui Liu ◽  
Zhengyu Xiao ◽  
...  
Keyword(s):  
Thin Films ◽  
Thermal Stability ◽  
Magnetic Anisotropy ◽  
High Stability ◽  
Essential Role ◽  
Perpendicular Magnetic Anisotropy ◽  
Low Energy ◽  
High Resistivity ◽  
Excellent Thermal Stability ◽  
Low Energy Consumption

Thin films with perpendicular magnetic anisotropy (PMA) play an essential role in the development of technologies due to their excellent thermal stability and potential application in devices with high density, high stability, and low energy consumption.

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