Structure and infrared radiation property of Co1−x Zn x Fe2O4 ferrites by XAFS analysis

Zhang, Ying; Di-jiang, Wen; Zhou, Jian; Gan, Jiuhui

doi:10.1007/s11595-009-6907-2

Cited by 2 publications

(3 citation statements)

References 14 publications

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“…The tectonic belongs to the south-central Gangdese -Nyainqentanglha (terrane) plate of Tibet Tethys domain. It is the typical large-scale porphyry-type deposit in the eastern section of Gangdese Porphyry Copper Belt basing on molybdenum and copper while symbiosis with lead and zinc.The molybdenum resources in the deposit accounts for 60% of the proved molybdenum ore reserves of Tibet, with the prospects of "the largest molybdenum deposit of Tibet", and is expected to be built into the most important industrial base of molybdenum ore in Tibet [4] .The causes of the deposit is subvolcanic-hydrothermal ore deposits; Classifying according to the ore-bearing rock, the molybdenum copper ore is porphyry deposit and the lead-zinc ore is carbonate type deposit [5] .Zhou [6] divided the evolution of the fluid inclusions of Bangpu deposit into three ore-forming stages: molybdenum-copper stage, galena-sphaleriteore stage and gypsum-calcite stage. The study of Zhou et al for the ore fluid sources showed that, the ore-forming fluid of all stages may be mainly derived from the mix of magmatic water and meteoric precipitation, and the latter is the main [7] .…”

Section: Introductionmentioning

confidence: 99%

Further Studies of Ore-Forming Fluid Sources of Bangpu Molybdenum-Copper Polymetallic Deposit, Tibet

Zhou

Zhang

2013

AMR

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Bangpu molybdenum-copper polymetallic deposit is located in the eastern section of the Gangdese Porphyry Copper Belt of Tibet. It is a typical large porphyry molybdenum copper polymetallic deposit. The isotope study of fluid inclusions H and O in the quartz (calcite) of various mineralization stages shows that, the ore-forming fluid comes mainly from meteoric hydrothermal caused by atmospheric precipitation, which has consistency with ore-forming fluid sources of Gangdese Porphyry Copper Belt. The Mo-Cu phase with low δD value (-140.5 ~ -104.0 ) suggests a large-scale magmatic degassing. The alteration and mineralization have been caused precisely by the degassing, and the obvious O isotope drift occurred being accompanied by alteration-mineralization, so that the fluid has a low δ18O (vary from 5.50 to 9.0 ). The statistical research indicates that, the massive magmatic degassing occurred in Gangdese Porphyry Copper Belt, and was gradually increased from east to west, suggesting the direct impact of the magmatic degassing on the formation of the porphyry copper-gold deposit and molybdenum copper deposit: the stronger the magmatic degassing, the more easily to form the molybdenum-based porphyry deposit, otherwise it will be formed the deposits dominated by Cu and Au.

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Section: Introductionmentioning

confidence: 99%

Further Studies of Ore-Forming Fluid Sources of Bangpu Molybdenum-Copper Polymetallic Deposit, Tibet

Zhou

Zhang

2013

AMR

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“…A key requirement for the use is its magnetism and infrared emissivity at room temperature. The spinel‐like CoZn ceramic has high infrared emissivity and saturation magnetization, whereas the attractive magnetic and infrared emission properties are essentially due to its local structure . CoZn ferrite is polycrystals, which tends to have the mixed spinel structure.…”

Section: Introductionmentioning

confidence: 99%

“…The spinel-like CoZn ceramic has high infrared emissivity and saturation magnetization, whereas the attractive magnetic and infrared emission properties are essentially due to its local structure. [3][4][5] CoZn ferrite is polycrystals, which tends to have the mixed spinel structure. The octahedral coordinated high spin Fe 3+ ions exhibit a strong spin-orbital coupling.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Cation Distribution on Magnetic and Infrared Emission Properties of RE³⁺, MnO₂:CoZn (RE = La,Ce,Pr,Nd,Sm,Eu,Gd,Tb, and Dy) Ferrite Ceramics

Zhang

Di-jiang

2012

J. Am. Ceram. Soc.

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The RE3+, MnO2:CoZn (RE = La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, and Dy) ferrite ceramics were prepared by solid‐state reaction method. The change in the magnetic and infrared emission properties of the samples due to the co‐doping of RE3+ and Mn4+ ions have been studied. X‐ray diffraction studies show that the main phase of the system is the spinel phase and the secondary phase (REFeO3) is formed on co‐doping of RE3+ and Mn4+ ions. The distribution of cation in the tetrahedral and octahedral sites was analyzed using X‐ray photoelectron spectroscopy and Mössbauer spectroscopy. It was observed that larger RE3+ ions easily occupy the interstitial sites or grain boundary, but not the octahedral sites of the spinel. Magnetic and infrared emission measurements indicate that saturation magnetization decreases and infrared emissivity and coercivity exhibit the nonlinear variations with kinds of RE3+ ions. The magnetic and infrared emission properties of samples seem to be greatly influenced by the cation distribution caused by synergistic effect of RE3+ and Mn4+ ions, in which the rare earth elements of La, Nd, and Gd play a more important role to improve the infrared emissivity and coercivity than others.

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Structure and infrared radiation property of Co1−x Zn x Fe2O4 ferrites by XAFS analysis

Cited by 2 publications

References 14 publications

Further Studies of Ore-Forming Fluid Sources of Bangpu Molybdenum-Copper Polymetallic Deposit, Tibet

Further Studies of Ore-Forming Fluid Sources of Bangpu Molybdenum-Copper Polymetallic Deposit, Tibet

The Effect of Cation Distribution on Magnetic and Infrared Emission Properties of RE³⁺, MnO₂:CoZn (RE = La,Ce,Pr,Nd,Sm,Eu,Gd,Tb, and Dy) Ferrite Ceramics

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Structure and infrared radiation property of Co1−x Zn x Fe2O4 ferrites by XAFS analysis

Cited by 2 publications

References 14 publications

Further Studies of Ore-Forming Fluid Sources of Bangpu Molybdenum-Copper Polymetallic Deposit, Tibet

Further Studies of Ore-Forming Fluid Sources of Bangpu Molybdenum-Copper Polymetallic Deposit, Tibet

The Effect of Cation Distribution on Magnetic and Infrared Emission Properties of RE3+, MnO2:CoZn (RE = La,Ce,Pr,Nd,Sm,Eu,Gd,Tb, and Dy) Ferrite Ceramics

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The Effect of Cation Distribution on Magnetic and Infrared Emission Properties of RE³⁺, MnO₂:CoZn (RE = La,Ce,Pr,Nd,Sm,Eu,Gd,Tb, and Dy) Ferrite Ceramics