scholarly journals Enhanced Tunability of BaTixSn1−xO3 Films on Dielectric Substrate

2021 ◽  
Vol 11 (16) ◽  
pp. 7367
Author(s):  
Andrey Tumarkin ◽  
Evgeny Sapego ◽  
Alexander Gagarin ◽  
Stanislav Senkevich
Keyword(s):  
Crystal Structure ◽  
Phase Composition ◽  
High Temperature ◽  
Dielectric Substrate ◽  
Electrical Characteristics ◽  
High Temperature Annealing ◽  
Ferroelectric Films ◽  
Structure Phase ◽  
Gas Medium ◽  
Microwave Characteristics

The structural properties of ferroelectric films of barium titanate-stannate on alumina substrates and the microwave characteristics of planar capacitive elements based on them are studied. It is established that the composition of the gas medium and the temperature of the substrate during the deposition of the film has a significant effect on the crystal structure, phase composition of the films and their electrical characteristics. Planar capacitors based on films subjected to high-temperature annealing after deposition exhibit 85% tunability at a frequency of 2 GHz, which is the best result for today.

scholarly journals Планарные емкостные структуры на основе сегнетоэлектрических пленок титаната-станната бария на сапфире для сверхвысокочастотных применений

2019 ◽  
Vol 45 (13) ◽  
pp. 3
Author(s):  
А.В. Тумаркин ◽  
М.В. Злыгостов ◽  
А.Г. Гагарин ◽  
А.Г. Алтынников ◽  
Е.Н. Сапего
Keyword(s):  
Crystal Structure ◽  
Phase Composition ◽  
Barium Titanate ◽  
60 Ghz ◽  
Electrical Characteristics ◽  
Frequency Range ◽  
Ferroelectric Films ◽  
Sapphire Substrates ◽  
High Tunability ◽  
Microwave Characteristics

The structural properties of ferroelectric films of barium titanate-stannate on the sapphire substrates and the microwave characteristics of planar capacitors on their base are investigated. It was found that the composition of the gas ambient during the deposition of the film has a significant effect on the crystal structure, the phase composition of the films and their electrical characteristics. A low level of dielectric loss of planar capacitors with high tunability based on films of barium titanate stannate in the frequency range of 2-60 GHz was demonstrated.

Structural and electrical characteristics of Ga2O3(Gd2O3)∕GaAs under high temperature annealing

2006 ◽  
Vol 100 (10) ◽  
pp. 104502 ◽  
Author(s):  
C. P. Chen ◽  
Y. J. Lee ◽  
Y. C. Chang ◽  
Z. K. Yang ◽  
M. Hong ◽  
...  
Keyword(s):  
High Temperature ◽  
Electrical Characteristics ◽  
High Temperature Annealing

Crystal structure, phase composition and microwave dielectric properties of Ca3MSi2O9 ceramics

2018 ◽  
Vol 750 ◽  
pp. 996-1002 ◽  
Author(s):  
Xiao-Qiang Song ◽  
Kang Du ◽  
Xian-Zhe Zhang ◽  
Jie Li ◽  
Wen-Zhong Lu ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Phase Composition ◽  
Dielectric Properties ◽  
Microwave Dielectric Properties ◽  
Microwave Dielectric ◽  
Structure Phase

The Study of Ingots and Deformed Semi-Finished Products of Al-Mg-Sc and Al-Cu-Li Alloys Using Diffraction Methods

2016 ◽  
Vol 877 ◽  
pp. 471-476 ◽  
Author(s):  
Boris Ovsyannikov ◽  
Olga Chikova ◽  
Pavel Reznik
Keyword(s):  
Crystal Structure ◽  
Heat Treatment ◽  
Phase Composition ◽  
Structure Phase ◽  
The Difference ◽  
Annealing Mode

The influence of Al-Mg-Sc ingots and Al-Cu-Li semi-finished products heat treatment modes on structure, phase composition, and crystal structure was studied. Based on EBSD and EDS data, the difference of the sample microstructures was detected and the most favorable annealing mode for further deformation was presumed.

High Temperature Functionalization and Surface Modification of Nanodiamond Powders

2007 ◽  
Vol 1039 ◽  
Author(s):  
Vadym N. Mochalin ◽  
Sebastian Osswald ◽  
Cristelle Portet ◽  
Gleb Yushin ◽  
Christopher Hobson ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Phase Composition ◽  
High Temperature ◽  
Surface Chemistry ◽  
Temperature Treatment ◽  
High Temperature Treatment ◽  
High Temperature Annealing ◽  
Treatment Techniques ◽  
Infra Red ◽  
Potential Applications

AbstractHigh temperature annealing in vacuum, air, hydrogen, chlorine, and ammonia are described as a means to change surface chemistry and phase composition of nanodiamond powders of three different grades, which have different sp2/sp3 carbon ratios. The changes in surface chemistry and phase composition of the powders are analyzed using Raman spectroscopy and Fourier Transform Infra Red (FTIR) spectroscopy. Advantages and limitation of high-temperature treatment techniques as well as potential applications of the gas-treated nanodiamond powders are discussed.

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