نتایج جستجو برای: nickel cobalt ferrite

تعداد نتایج: 66681  

2016
Xin Gao Xiangxuan Liu Zuoming Zhu Xuanjun Wang Zheng Xie

Modified TiO2 nanomaterials are considered to be promising in energy conversion and ferrites modification may be one of the most efficient modifications. In this research, various ferrites, incorporated with various cations (MFe2O4, M = Ni, Co, Zn, and Sr), are utilized to modify the well aligned TiO2 nanorod arrays (NRAs), which is synthesized by hydrothermal method. It is found that all MFe2O...

Journal: :Chemical communications 2014
Jie Yang Chunxiong Bao Kai Zhu Tao Yu Faming Li Jianguo Liu Zhaosheng Li Zhigang Zou

In situ grown nickel sulfide and cobalt sulfide hierarchical nanospheres on F-doped SnO2 (FTO) substrates exhibited comparable catalytic activities to sputtering Pt on the counter electrodes for dye-sensitized solar cells (DSSCs). The fresh cells with the nickel sulfide and cobalt sulfide on the counter electrodes could reach power conversion efficiencies of 6.81% and 6.59% respectively, approa...

Journal: :Journal of Materials Science: Materials in Electronics 2021

The purpose of this study is preparation polyaniline–lead ferrite, polyaniline–cobalt ferrite and polyaniline/nickel thin layers. electromagnetic pollution a serious problem in the world that can be solved by interference (EMI) shielding. EMI layers synthesized conductive layer composed magnetic particles. Crystallite size samples was studied (XRD) analyze via Debye–Scherrer Williamson–Hall equ...

2015
Lining Pan Derang Cao Panpan Jing Jianbo Wang Qingfang Liu

Nanocomposite of CoFe2O4/SrFe12O19 has been synthesized by the electrospinning and calcination process. A novel method that cobalt powder was used to replace traditional cobalt salt in the precursor sol-gel for electrospinning was proposed. The crystal structures, morphologies, and magnetic properties of these samples have been characterized in detail. Moreover, when the average crystallite siz...

Journal: :Thorax 1990
T Shirakawa Y Kusaka N Fujimura M Kato S Heki K Morimoto

Eight asthmatic patients with hard metal asthma due to cobalt underwent bronchial provocation challenge with nickel sulphate. Seven patients developed a fall in FEV1 of 20% or more after inhaling nickel sulphate, four showing an immediate response and three a late response. Eight control subjects, including six asthmatic patients, with no history of hard metal exposure, showed no bronchoconstri...

Journal: :The Journal of bone and joint surgery. British volume 1981
T Rae

Some of the component metals of the alloys used for total joint prostheses are toxic and dissolve in the body fluids. It is important to establish how toxic these metals are and to assess the risk of localised tissue necrosis around the prostheses. This has been investigated by incubating primary monolayer cultures of human synovial fibroblasts with various preparations of metals for periods up...

2017
Nathalie Mie Suzuki Ida Alzira Gomes Duarte Mariana de Figueiredo Silva Hafner Rosana Lazzarini

Keys are a significant source of exposure to metal allergens and can be a relevant problem for nickel-allergic individuals. This study aimed to perform nickel and cobalt spot testing among the 5 most common Brazilian brands of keys. Among the tested keys, 100% showed positive result to nickel spot test, 83,3% presented strong positive reaction. 50% exhibited cobalt release as well. Nickel relea...

2014
Stefano Diodati Luciano Pandolfo Andrea Caneschi Stefano Gialanella Silvia Gross

Crystalline and nanostructured cobalt (CoFe2O4), nickel (NiFe2O4), zinc (ZnFe2O4) and manganese (MnFe2O4) spinel ferrites are synthesized with high yields, crystallinity and purity through an easy, quick, reproducible and low‐temperature hydrothermal assisted route starting from an aqueous suspension of coprecipitated metal oxalates. The use of water as a reaction medium is a further adva...

2018
Urszula Klekotka Ewelina Wińska Elżbieta Zambrzycka-Szelewa Dariusz Satuła Beata Kalska-Szostko

In this work, we analyze artificial heavy-metal solutions with ferrite nanoparticles. Measurements of adsorption effectiveness of different kinds of particles, pure magnetite or magnetite doped with calcium, cobalt, manganese, or nickel ions, were carried out. A dependence of the adsorption efficiency on the composition of the inorganic core has been observed. Ferrites surfaces were modified by...

2011
H. Heegn B. Friedrich T. Müller

Nickel-metal hydride batteries (Ni-MH) are storers of electrochemical energy, which have a higher specific storage capacity than lead or nickel-cadmium batteries. The demand for Nickel-metal hydride batteries is increasing rapidly since their market launch in the early 1990's. Today there is no suitable and sustainable recycling process to recover nickel, cobalt and rare-earth metals. The disca...

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