Varistor and Magnetic Properties of Nickel Copper Zinc Niobium Ferrite Doped with Bi2 O3

2014 ◽  
Vol 97 (12) ◽  
pp. 3918-3925 ◽  
Author(s):  
Li-Then Mei ◽  
Hsing-I Hsiang ◽  
Wei-Hung Hsu
Keyword(s):  
Magnetic Properties ◽  
Nickel Copper ◽  
Copper Zinc

MAGNETIC PROPERTIES OF NICKEL-COPPER AND NICKEL-COBALT ALLOYS

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-1937-C8-1938 ◽  
Author(s):  
D. C. Jiles ◽  
T. T. Chang ◽  
D. R. Hougen ◽  
R. Ranjan
Keyword(s):  
Magnetic Properties ◽  
Cobalt Alloys ◽  
Nickel Cobalt ◽  
Nickel Copper

A Comparative Study on the Capability of Tree Species in Urban Afforestation to Accumulate Heavy Metals

2021 ◽  
Vol 9 (1) ◽  
pp. 79-90
Author(s):  
Samar Mortazavi ◽  
◽  
Masoud Hatamimanesh ◽  
Farzad Veysanlou ◽  
◽  
...  
Keyword(s):  
Heavy Metals ◽  
Tree Species ◽  
Metal Accumulation ◽  
Climatic Conditions ◽  
Heavy Metal Accumulation ◽  
Toxicity Potential ◽  
Nickel Copper ◽  
Accumulation Index ◽  
Copper Zinc ◽  
Lead Nickel

Background: The present study investigated the concentrations of lead, nickel, copper, zinc, their toxicity potential, and their ecological hazard in surface soils of Hamedan City, Iran. Also, using the Bio-concentration Factor (BCF), concentration Comprehensive Bio-concentration Index (CBCI), and Metal Accumulation Index (MAI), was evaluated the ability of some tree and shrub species to absorb heavy metals in soil and air. Methods: Sampling of leaves of nine tree species and shrubs (plane, acacia, elm, willow, mulberry, ash, redbud, pine, and cypress) was performed in six stations. After preparation and acid digestion of the samples, the concentrations of heavy metals were determined using an atomic absorption spectrometer. Results: The trend of changes in soil heavy Mean±SD metal concentrations was in the order of nickel> zinc> copper> lead in the amounts of 61.41±11.34˃ 43.04±14.4˃ 42.87±8.36˃ 18.77±6.51 mg/kg. Evaluation of acute toxicity potential indicators and ecological risk of heavy metals indicated low soil pollution status. Findings of BCF, CBCI, and MAI ndices in the leaves of the species showed that the highest levels of BCF of heavy metals, i.e., zinc, copper, lead, and nickel, were in willow, elm, cypress, and pine species, respectively. Results show that heavy metal accumulation in different species. Conclusion: Depends on soil type, tree species, climatic conditions, type of pollutant source, species age, and other factors. In this study, elm and acacia have the highest ability to absorb heavy metals from soil and air.

Structural, morphological and magnetic properties of Mn2+ ions substituted nanosized nickel–copper–cobalt ferrites through sol–gel auto-combustion method

2019 ◽  
Vol 34 (01) ◽  
pp. 2050002
Author(s):  
Wei Zhang ◽  
Aimin Sun ◽  
Xiqian Zhao ◽  
Xiaoguang Pan ◽  
Yingqiang Han
Keyword(s):  
Magnetic Properties ◽  
Saturation Magnetization ◽  
Spinel Structure ◽  
Remanent Magnetization ◽  
Cobalt Ferrite ◽  
Sol Gel ◽  
Combustion Method ◽  
Magnetic Data ◽  
Nickel Copper ◽  
Auto Combustion

Manganese substituted nickel–copper–cobalt ferrite nanoparticles having the basic composition [Formula: see text] (x = 0.0, 0.1, 0.2, 0.3 and 0.4) were synthesized by sol–gel auto-combustion method. X-ray diffraction (XRD) was used to estimate phase purity and lattice symmetry. All the prepared samples show the single-phase cubic spinel structure. Fourier transform infrared (FTIR) measurements also confirm the cubic spinel structure of the ferrite that is formed. The preparation of samples show these nearly spherical particles by Transmission electron microscopy (TEM). The magnetic properties of Mn[Formula: see text] ion substituted in nickel–copper–cobalt ferrite were studied by Vibrating sample magnetometer (VSM). The saturation magnetization ([Formula: see text]), remanent magnetization [Formula: see text], coercivity [Formula: see text], magnetic moment [Formula: see text] and anisotropy constant [Formula: see text] first increase and then decrease with the increase of [Formula: see text] ions content. They had better magnetism than pure sample and other substituted samples when the substitution amount of [Formula: see text] ions was [Formula: see text]. At [Formula: see text], the maximum values of remanent magnetization [Formula: see text], saturation magnetization [Formula: see text] and coercivity [Formula: see text] are 25.58 emu/g, 61.95 emu/g and 689.76 Oe, respectively. This indicates that the magnetism of ferrite can improve by substituting with the appropriate amount of manganese. However, due to the excess [Formula: see text] ions instead, ferrite magnetism is weakened. This means that these materials can be used in magnetic data storage and recording media.

scholarly journals On the Spatial Dimension of the Circular Economy

Resources ◽  
2019 ◽  
Vol 8 (1) ◽  
pp. 32 ◽  
Author(s):  
T. Graedel ◽  
Barbara Reck ◽  
Luca Ciacci ◽  
Fabrizio Passarini
Keyword(s):  
Circular Economy ◽  
Spatial Dimension ◽  
Metal Extraction ◽  
Extraction Capacity ◽  
Resource Network ◽  
Carbon Neutrality ◽  
Nickel Copper ◽  
Product Manufacturing ◽  
Copper Zinc ◽  
Conservation Of Natural Resources

The concept of a “circular economy”, in which material in society is regarded as “a transient phase in anthropogenic resource utilization”, is a growing topic for discussion. The primary motivations for supporting a circular economy include a reduction of environmental impacts and conservation of natural resources. Australia is a vivid example of a country whose large metal extraction capacity is not balanced as it has neither an extensive product manufacturing capability nor a large domestic market. Consequently, Australia must rely on the global resource network to achieve circularity and carbon neutrality. This work illustrates this situation with quantitative material flow cycles for Australian aluminum, nickel, copper, zinc, and stainless steel, and comments on the implications of the results for Australia and for circular economy prospects more generally.

The Distribution of Nickel, Copper, Zinc, and Iron in Tree Leaves

1973 ◽  
Vol 24 (5) ◽  
pp. 889-895 ◽  
Author(s):  
M. H. TIMPERLEY ◽  
R. R. BROOKS ◽  
P. J. PETERSON
Keyword(s):  
Tree Leaves ◽  
Nickel Copper ◽  
Copper Zinc
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