نتایج جستجو برای: zro2 sensor

تعداد نتایج: 192092  

2016
E. Zalnezhad A. M. S. Hamouda J. Jaworski Young Do Kim

Combinations of three simple techniques were utilized to gradually form zirconia nanoneedles from zirconium nanograins. First, a physical vapor deposition magnetron sputtering technique was used to deposit pure zirconium nanograins on top of a substrate. Second, an anodic oxidation was applied to fabricate zirconia nanotubular arrays. Finally, heat treatment was used at different annealing temp...

2016
Jigang Wang Wenyan Yin Xiao He Qiang Wang Ming Guo Shaowei Chen

ZrO2 nanoparticles were synthesized by a vapor-phase hydrolysis process, and characterized in terms of crystalline structures, hardness and microstructures by X-ray diffraction, Vickers hardness test method, and atomic force microscopy (AFM) measurements. Moreover, in vitro cytotoxicity evaluation and hemolysis assay showed that the nanoparticles possessed good biocompatibility. Hardness invest...

2015
Elisa Sani Luca Mercatelli Jean-Louis Sans Diletta Sciti

Zirconia (ZrO2) is a well known oxide refractory material, possessing high strength and high melting point. Black zirconia is a variant of conventional zirconia obtained by the addition of a pigments percentage which changes its color from white to black. The present work shows, for the first time to the best of our knowledge, optical spectra of black ZrO2 in the range 0.3-16.3 μm, comparing th...

Journal: :Chemical communications 2013
Hisaya Kawabata Yuki Koda Hirosuke Sumida Masahiko Shigetsu Akihide Takami Kei Inumaru

Rhodium on a La-containing ZrO2 support effectively eliminated NOx from a synthetic auto exhaust gas under fluctuating oxygen conditions. Rhodium particles maintained a low oxidation state on the ZrO2-La2O3 mixed oxide even after treatment with 5% O2 at 773 K, highlighting the significant effect of the La addition.

Journal: :international journal of nano dimension 0
a. a. mehrdad sharif department of analytical chemistry, faculty of chemistry, north tehran branch, islamic azad university, tehran, iran. s. abedini khorrami department of analytical chemistry, faculty of chemistry, north tehran branch, islamic azad university, tehran, iran. n. assi department of analytical chemistry, faculty of chemistry, north tehran branch, islamic azad university, tehran, iran.

zro2 nanopowder was prepared by the sol-gel auto-combustion method. the product was characterized by x-ray diffraction (xrd), energy dispersive analysis of x-ray (edx) and scanning electron microscopy (sem). the average crystalline size of zro2 was obtained 62 nm. also, photocatalytic removal of nitrophenol from aqueous solution by using nanoscale zro2 under uv light irradiation was studied. th...

Journal: :Materials science & engineering. C, Materials for biological applications 2015
Maziar Montazerian Bijan Eftekhari Yekta Vahak Kaspari Marghussian Caroline Faria Bellani Renato Luiz Siqueira Edgar Dutra Zanotto

In this study, 10 mol% ZrO2 was added to a 27CaO-5P2O5-68SiO2 (mol%) base composition synthesized via a simple sol-gel method. This composition is similar to that of a frequently investigated bioactive gel-glass. The effects of ZrO2 on the in vitro bioactivity and MG-63 cell proliferation of the glass and its derivative polycrystalline (glass-ceramic) powder were investigated. The samples were ...

Journal: :Nanoscale 2014
Kuo-Ju Chen Hau-Vei Han Hsin-Chu Chen Chien-Chung Lin Shih-Hsuan Chien Chung-Ching Huang Teng-Ming Chen Min-Hsiung Shih Hao-Chung Kuo

To enhance the uniformity of correlated color temperature (CCT) and luminous flux, we integrated ZrO2 nanoparticles into white light-emitting diodes. This novel packaging scheme led to a more than 12% increase in luminous flux as compared to that in conventional dispensing structures. This was attributed to the scattering effect of ZrO2 nanoparticles, which enhanced the utilization of blue ligh...

2018
Mary Gurak Quentin Flamant Laetitia Laversenne David R. Clarke John Paulson

The phase diagram for the YTaO4-ZrO2 quasi-binary has been determined up to 1600 °C. There are three distinct compositional regimes: an extensive YTaO4 solid solution, an extensive ZrO2 solid solution and a two-phase intermediate region. The addition of ZrO2 to YTaO4 decreases the M–T transition temperature almost linearly from 1426 °C to approximately 450 °C at the solubility limit (∼28mol% Zr...

2017
Amit Singhania Shipra Mital Gupta

Zirconia (ZrO2) nanoparticles co-doped with Cu and Pt were applied as catalysts for carbon monoxide (CO) oxidation. These materials were prepared through solution combustion in order to obtain highly active and stable catalytic nanomaterials. This method allows Pt2+ and Cu2+ ions to dissolve into the ZrO2 lattice and thus creates oxygen vacancies due to lattice distortion and charge imbalance. ...

1999
G. G. Siu M. J. Stokes Yulong Liu

ZrO2 nanograins annealed at different temperatures are systematically investigated using x-ray diffraction ~XRD! and Raman spectroscopy. Our results show that bulk properties of nano-ZrO2 diminish but the defect-, surface-, and size-related features display as grain size decreases. A critical size that divides respective predominance is determined to be about 15 nm. Both XRD and Raman spectra o...

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