scholarly journals The Influence of Recrystallization on Zinc Oxide Microstructures Synthesized with Sol–Gel Method on Scintillating Properties

Crystals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 533
Author(s):  
Ewelina Nowak ◽  
Mirosław Szybowicz ◽  
Alicja Stachowiak ◽  
Daria Piechowiak ◽  
Andrzej Miklaszewski ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Sapphire Substrate ◽  
Room Temperature ◽  
Sol Gel ◽  
Wide Bandgap ◽  
Luminescence Analysis ◽  
Gel Method ◽  
Sol Gel Method ◽  
Different Temperatures ◽  
Bandgap Semiconductors

Zinc oxide (ZnO) is one of the wide-bandgap semiconductors, which may be useful in a plethora of electronic, optical, piezoelectric, and scintillating applications. The following article consists in a structural and luminescence analysis of ZnO microfilms grown on a sapphire substrate with a sol–gel method. The films were annealed at different temperatures. The structures were investigated with the XRD and Raman methods, by which the influence of the substrate on the structure of the film was determined. The luminescence of films was investigated with room-temperature fluorescence, radioluminescence, and thermoluminescence.

Elaboration of Low Field and Room Temperature Magnetoresistive Sensor of La0.7Sr0.3MnO3 Nanoparticles Synthesized by Sol-Gel Method

2015 ◽  
Vol 771 ◽  
pp. 121-124 ◽  
Author(s):  
Christian Fredy Naa ◽  
Didier Fasquelle ◽  
Manuel Mascot ◽  
Mitra Djamal
Keyword(s):  
Room Temperature ◽  
Sol Gel ◽  
Magnetic Sensors ◽  
X Ray Diffraction ◽  
Gel Method ◽  
Sol Gel Method ◽  
Magnetoresistive Sensor ◽  
Low Field ◽  
Ferromagnetic Nature ◽  
Different Temperatures

Low field and room temperature operation range are two critical requirements for magnetic sensors. In this paper, nanoparticles of La0.7Sr0.3MnO3 (LSMO) were elaborated to fulfill these requirements. La0.7Sr0.3MnO3 nanoparticles were synthesized using sol-gel method. The physical properties of LSMO were examined by X-Ray diffraction and Scanning Electron Microscope. The ferromagnetic nature of LSMO samples was confirmed by magnetization measurements. Nanoparticles were pressed in shape of pellets and sintered at different temperatures of 900°C, 1000°C, 1100°C and 1200°C. Magnetoresistive measurements were taken at room temperature with magnetic field (μH) in range ±110 mT. The experimental results show maximum magnetoresistive ratio and sensitivity of 1.3% and 0.023%/mT respectively for sample sintered at 1000°C. Other sensor characteristics namely hysteresis error, response time and noise measurement were also given.

Vacuum Annealing Induced Room-Temperature Ferromagnetism in Co 0.1 Ti 0.9 O 2−δ Films Prepared by Sol-Gel Method

2008 ◽  
Vol 25 (7) ◽  
pp. 2638-2641
Author(s):  
Liu Li-Feng ◽  
Kang Jin-Feng ◽  
Wang Yi ◽  
Zhang Xing ◽  
Han Ru-Qi
Keyword(s):  
Room Temperature ◽  
Vacuum Annealing ◽  
Room Temperature Ferromagnetism ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method

Impedance Spectroscopy Study of LiTaO3 Powder Synthesized via Sol-Gel Method

2012 ◽  
Vol 545 ◽  
pp. 275-278 ◽  
Author(s):  
Lili Widarti Zainuddin ◽  
Norlida Kamarulzaman
Keyword(s):  
Room Temperature ◽  
Single Phase ◽  
Sol Gel ◽  
Rhombohedral Structure ◽  
Spectroscopy Study ◽  
X Ray Diffraction ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Impedance Spectroscopy Study

A ceramics sample of LiTaO3 was prepared using a sol-gel method. The sample is annealed at 750 °C for 48 hours. X-ray diffraction analysis indicate the formation of single phase, rhombohedral structure. An ac impedance study was used to analyse the conductivity of LiTaO3 at room temperature and at various temperatures.

scholarly journals Optical Properties of Sn Doped ZnO Thin Film Prepared Using Sol-Gel Method for Optical Limiting Application

2021 ◽  
Vol 24 (3) ◽  
pp. 38-42
Author(s):  
Marwa Mudfer Alqaisi ◽  
◽  
Alla J. Ghazai ◽  
Keyword(s):  
Thin Films ◽  
Zinc Oxide ◽  
Optical Properties ◽  
Sol Gel ◽  
Visible Region ◽  
Optical Limiting ◽  
Pure Zinc ◽  
Gel Method ◽  
Sol Gel Method ◽  
Doped Zno

In this work, pure Zinc oxide and tin doped Zinc oxide thin films nanoparticles with various volume concentrations of 2, 4, 6, and 8V/V% were prepared by using the sol-gel method. The optical properties were investigated by using UV-Visible spectroscope, and the value exhibits the direct allowed transition. The average of transmittance was around ~(17-23) %in visible region. The optical energy band gap was calculated with wavelength (300-900) nm for pure ZnO and Sn doped ZnO thin films which decreases with increasing concentration from 3.4 eV to 3.1 eV respectively and red shift. The real dielectric(εr) and the imaginary dielectric εiare the same behavior of the refractive index(n) the extinction coefficient (k) respectively. The optical limiting properties were studied by using an SDL laser with a wavelength of 235 nm. ZnO and doping thin films an found efficient as optic limiting and depend on the concentration of the all samples.

scholarly journals Growth and Characterization of Indium-Doped Zinc Oxide Thin Films Prepared by Sol-Gel Method

2012 ◽  
Vol 121 (1) ◽  
pp. 217-220 ◽  
Author(s):  
M.S. Kim ◽  
K.G. Yim ◽  
S. Kim ◽  
G. Nam ◽  
D.Y. Lee ◽  
...  
Keyword(s):  
Thin Films ◽  
Zinc Oxide ◽  
Sol Gel ◽  
Oxide Thin Films ◽  
Gel Method ◽  
Sol Gel Method

Pyroelectric Properties of the Plt(10) Thin Film on the P-Doped Poly Silicon

1996 ◽  
Vol 433 ◽  
Author(s):  
Seong Jun Kang ◽  
Yung Sup Yoon ◽  
Dong Il Kim
Keyword(s):  
Thin Film ◽  
Dielectric Constant ◽  
Curie Temperature ◽  
Room Temperature ◽  
Sol Gel ◽  
Pyroelectric Coefficient ◽  
Pyroelectric Properties ◽  
Gel Method ◽  
Sol Gel Method ◽  
Poly Silicon

AbstractWe have studied the pyroelectric properties of the PLT(10) thin film deposited on a p-doped poly-Si electrode by using the sol-gel method. Measurement of the dielectric constant as a function of temperature shows the typical characteristics of a ferroelectric. The dielectric constant reaches a maximum at 295°C, which can be thought of as the Curie temperature. The PLT(10) thin film on p-doped poly-Si fabricated in this research shows excellent pyroelectric properties. The pyroelectric coefficient and the fiqures of merit, Fv and FD at room temperature are measured as 5.76 × 10−8 C/cm2 °C, 1.17 × 10−10C-cm/J and 0.93 × 10−8C-cm/J, respectively.

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