scholarly journals Direct and Alternate Current Conductivity and Magnetoconductivity of Nanocrystalline Cadmium-Zinc Ferrite below Room Temperature

2011 ◽  
Vol 02 (04) ◽  
pp. 226-236 ◽  
Author(s):  
Somenath Ghatak ◽  
Goutam Chakraborty ◽  
Monika Sinha ◽  
Swapan Kumar Pradhan ◽  
Ajit Kumar Meikap
Keyword(s):  
Zinc Ferrite ◽  
Room Temperature ◽  
Alternate Current ◽  
Cadmium Zinc

Microemulsion-based synthesis of porous zinc ferrite nanorods and its application in a room-temperature ethanol sensor

2008 ◽  
Vol 19 (40) ◽  
pp. 405503 ◽  
Author(s):  
Hongliang Zhu ◽  
Xiaoyun Gu ◽  
Diantai Zuo ◽  
Zhengkai Wang ◽  
Naiyan Wang ◽  
...  
Keyword(s):  
Zinc Ferrite ◽  
Room Temperature ◽  
Ethanol Sensor

A Magnetically Ordered Non-Stoichiometric Zinc Ferrite for the Oxidative Dehydrogenation Reactions.

2001 ◽  
Vol 676 ◽  
Author(s):  
J. A. Toledo ◽  
N. Nava ◽  
X. C. Sun ◽  
X. Bokhimi
Keyword(s):  
Catalytic Activity ◽  
Oxidative Dehydrogenation ◽  
Spinel Structure ◽  
Zinc Ferrite ◽  
Room Temperature ◽  
Annealing Temperature ◽  
Octahedral Sites ◽  
Tetrahedral Sites ◽  
Dehydrogenation Reactions ◽  
Hydrothermal Reduction

ABSTRACTZnFe2O4 nanoparticles were prepared by hydrothermal reduction approach. A considerable amount of α-Fe2O3 was segregated in the as-synthesized sample, which diffused into the tetrahedral and octahedral sites of the ZnFe2O4 spinel structure with increasing the annealing temperature. The introduction of Fe3+ into the tetrahedral positions was observed by Mössbauer spectra. Magnetization measurements showed an unusual ferrimagnetic behavior of the ZnFe2O4 phase, even at room temperature, confirming the introduction of Fe3+ into the tetrahedral sites of the spinel structure. Catalytic activity measured in the oxidative dehydrogenation of 1-butene reaction increased with increasing annealing temperature, indicating that those interactions of Fe3+ in tetrahedral and octahedral positions also promotes the activity and selectivity to butadiene formation.

Room-temperature X-ray response of cadmium–zinc–telluride pixel detectors grown by the vertical Bridgman technique

2020 ◽  
Vol 27 (2) ◽  
pp. 319-328 ◽  
Author(s):  
Leonardo Abbene ◽  
Fabio Principato ◽  
Gaetano Gerardi ◽  
Antonino Buttacavoli ◽  
Donato Cascio ◽  
...  
Keyword(s):  
Room Temperature ◽  
Cadmium Zinc Telluride ◽  
Photon Counting ◽  
Zinc Telluride ◽  
High Rate ◽  
High Flux ◽  
X Ray ◽  
Pixel Detectors ◽  
Vertical Bridgman ◽  
Cadmium Zinc

In this work, the spectroscopic performances of new cadmium–zinc–telluride (CZT) pixel detectors recently developed at IMEM-CNR of Parma (Italy) are presented. Sub-millimetre arrays with pixel pitch less than 500 µm, based on boron oxide encapsulated vertical Bridgman grown CZT crystals, were fabricated. Excellent room-temperature performance characterizes the detectors even at high-bias-voltage operation (9000 V cm−1), with energy resolutions (FWHM) of 4% (0.9 keV), 1.7% (1 keV) and 1.3% (1.6 keV) at 22.1, 59.5 and 122.1 keV, respectively. Charge-sharing investigations were performed with both uncollimated and collimated synchrotron X-ray beams with particular attention to the mitigation of the charge losses at the inter-pixel gap region. High-rate measurements demonstrated the absence of high-flux radiation-induced polarization phenomena up to 2 × 106 photons mm−2 s−1. These activities are in the framework of an international collaboration on the development of energy-resolved photon-counting systems for high-flux energy-resolved X-ray imaging.

Recent advances in the development of high-resolution 3D cadmium–zinc–telluride drift strip detectors

2020 ◽  
Vol 27 (6) ◽  
pp. 1564-1576
Author(s):  
Leonardo Abbene ◽  
Gaetano Gerardi ◽  
Fabio Principato ◽  
Antonino Buttacavoli ◽  
Saverio Altieri ◽  
...  
Keyword(s):  
High Resolution ◽  
Room Temperature ◽  
Gamma Ray ◽  
Cadmium Zinc Telluride ◽  
Zinc Telluride ◽  
Strip Detectors ◽  
Correction Technique ◽  
Wide Range ◽  
Induced Charge ◽  
Cadmium Zinc

In the last two decades, great efforts have been made in the development of 3D cadmium–zinc–telluride (CZT) detectors operating at room temperature for gamma-ray spectroscopic imaging. This work presents the spectroscopic performance of new high-resolution CZT drift strip detectors, recently developed at IMEM-CNR of Parma (Italy) in collaboration with due2lab (Italy). The detectors (19.4 mm × 19.4 mm × 6 mm) are organized into collecting anode strips (pitch of 1.6 mm) and drift strips (pitch of 0.4 mm) which are negatively biased to optimize electron charge collection. The cathode is divided into strips orthogonal to the anode strips with a pitch of 2 mm. Dedicated pulse processing analysis was performed on a wide range of collected and induced charge pulse shapes using custom 32-channel digital readout electronics. Excellent room-temperature energy resolution (1.3% FWHM at 662 keV) was achieved using the detectors without any spectral corrections. Further improvements (0.8% FWHM at 662 keV) were also obtained through a novel correction technique based on the analysis of collected-induced charge pulses from anode and drift strips. These activities are in the framework of two Italian research projects on the development of spectroscopic gamma-ray imagers (10–1000 keV) for astrophysical and medical applications.

Synthesis, characterization and performance of zinc ferrite nanorods for room temperature sensing applications

2015 ◽  
Vol 618 ◽  
pp. 475-483 ◽  
Author(s):  
Archana Singh ◽  
Ajendra Singh ◽  
Satyendra Singh ◽  
Poonam Tandon ◽  
B.C. Yadav ◽  
...  
Keyword(s):  
Zinc Ferrite ◽  
Room Temperature ◽  
Temperature Sensing ◽  
Sensing Applications ◽  
And Performance

Bismuth Substituted Zinc Ferrite: A New Room Temperature Multiferroic

2011 ◽  
Author(s):  
Kapil K. Bhatt ◽  
Chetan V. Gurada ◽  
D. C. Kothari ◽  
Amitabha Ghoshray ◽  
Bilwadal Bandyopadhyay ◽  
...  
Keyword(s):  
Zinc Ferrite ◽  
Room Temperature

scholarly journals Post-growth Annealing of Cadmium Zinc Telluride Crystals for Room-Temperature Radiation Detectors

2012 ◽  
Vol 41 (10) ◽  
pp. 2912-2916 ◽  
Author(s):  
G. Yang ◽  
A.E. Bolotnikov ◽  
P.M. Fochuk ◽  
Y. Cui ◽  
G. S. Camarda ◽  
...  
Keyword(s):  
Room Temperature ◽  
Cadmium Zinc Telluride ◽  
Zinc Telluride ◽  
Radiation Detectors ◽  
Temperature Radiation ◽  
Cadmium Zinc
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