scholarly journals Morphology and Magnetic Properties of Ferriferous Two-Phase Sodium Borosilicate Glasses

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Alexander Naberezhnov ◽  
Nadezda Porechnaya ◽  
Viktor Nizhankovskii ◽  
Alexey Filimonov ◽  
Bernard Nacke
Keyword(s):  
Magnetic Properties ◽  
Iron Oxides ◽  
Channel Structure ◽  
Borosilicate Glasses ◽  
Melt Quenching ◽  
Two Phase ◽  
Furnace Charge ◽  
Self Assembling ◽  
Quenching Method ◽  
Drop Structure

This contribution is devoted to the study of morphology and magnetic properties of sodium borosilicate glasses with different concentrations (15, 20, and 25 wt.%) ofα-Fe2O3in an initial furnace charge. These glasses were prepared by a melt-quenching method. For all glasses a coexistence of drop-like and two-phase interpenetrative structures is observed. The most part of a drop structure is formed by self-assembling iron oxides particles. All types of glasses demonstrate the magnetic properties and can be used for preparation of porous magnetic matrices with nanometer through dendrite channel structure.

Magnetic Properties of Two-Phase Borosilicate Glasses Containing β-Fe2O3 and Fe3O4 Nanoparticles

2020 ◽  
Vol 46 (8) ◽  
pp. 808-811
Author(s):  
S. A. Borisov ◽  
A. A. Naberezhnov ◽  
B. Nacke ◽  
A. Nikanorov
Keyword(s):  
Magnetic Properties ◽  
Fe3o4 Nanoparticles ◽  
Borosilicate Glasses ◽  
Two Phase

scholarly journals Магнитные свойства двухфазных магнитных боросиликатных стекол, содержащих наночастицы beta-Fe-=SUB=-2-=/SUB=-O-=SUB=-3-=/SUB=- и Fe-=SUB=-3-=/SUB=-O-=SUB=-4-=/SUB=-

2020 ◽  
Vol 46 (16) ◽  
pp. 28
Author(s):  
С.А. Борисов ◽  
А.А. Набережнов ◽  
B. Nacke ◽  
A. Nikanorov
Keyword(s):  
Magnetic Properties ◽  
Magnetic Fields ◽  
Fe3o4 Nanoparticles ◽  
Superparamagnetic Nanoparticles ◽  
Blocking Temperature ◽  
Neel Temperature ◽  
Specific Magnetization ◽  
Borosilicate Glasses ◽  
Néel Temperature ◽  
Two Phase

The magnetic properties of two-phase borosilicate glasses containing in the skeleton a mixture of β-Fe2O3 and Fe3O4 nanoparticles have been studied. The sizes of nanoparticles have been determined, the value of blocking temperature (TB ~ 330 K) for ensemble of superparamagnetic nanoparticles is obtained. It is shown that in the high applied magnetic fields the specific magnetization of these glasses increases sharply at approaching and below Neel temperature for the bulk β-Fe2O3.

scholarly journals SEM and AFM Studies of Two-Phase Magnetic Alkali Borosilicate Glasses

2017 ◽  
Vol 2017 ◽  
pp. 1-9
Author(s):  
N. Andreeva ◽  
M. Tomkovich ◽  
A. Naberezhnov ◽  
B. Nacke ◽  
A. Filimonov ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Necessary Condition ◽  
Borosilicate Glasses ◽  
Two Phase ◽  
Force Microscopy ◽  
Treatment Processes ◽  
Atomic Force ◽  
First Results ◽  
Magnetic Glasses ◽  
Alkali Borosilicate Glasses

The morphology and composition of four types of two-phase alkali borosilicate glasses with magnetic atoms prepared by inductive melting have been studied. The results of scanning electron microscopy point to uniform distribution of Na, Si, and O atoms in these samples while magnetic iron atoms form ball-shaped agglomerates. The magnetic properties of these agglomerates have been confirmed by magnetic force microscopy. Atomic force microscopy had shown that in these samples two different morphological structures, drop-like and dendrite net, are formed. The formation of dendrite-like structure is a necessary condition for production of porous magnetic glasses. The obtained results allow us to optimize the melting and heat treatment processes leading to production of porous alkali borosilicate glasses with magnetic properties. The first results for nanocomposite materials on the basis of magnetic glasses containing the embedded ferroelectrics KH2PO4 demonstrate the effect of applied magnetic field on the ferroelectric phase transition.

scholarly journals Magnetic properties of glass-ceramics obtained by crystallization of iron-rich borosilicate glasses

2017 ◽  
Vol 6 (3) ◽  
pp. 251-261 ◽  
Author(s):  
V. Sandu ◽  
E. Cimpoiasu ◽  
A. Kuncser ◽  
M. S. Nicolescu
Keyword(s):  
Magnetic Properties ◽  
Glass Ceramics ◽  
Borosilicate Glasses

scholarly journals Up- and Downconversion Luminescence Properties of Nd3+Ions Doped in Bi2O3–BaO–B2O3Glass System

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
R. Ruamnikhom ◽  
P. Limsuwan ◽  
M. Horprathum ◽  
N. Chanthima ◽  
H. J. Kim ◽  
...  
Keyword(s):  
Radiative Decay ◽  
Excited State Absorption ◽  
Upconversion Emission ◽  
Luminescence Properties ◽  
Barium Borate ◽  
Melt Quenching ◽  
Strong Fluorescence ◽  
Nir Emission ◽  
Quenching Method ◽  
Barium Borate Glass

Physical, optical, and luminescence properties of Nd3+ions in bismuth barium borate glass system were studied. The glasses prepared by a melt quenching method were doped at various Nd2O3concentrations in compositions (40-x)B2O3 : 40Bi2O3 : 20BaO : xNd2O3(wherex= 0.00, 0.50, 1.00, 1.50, 2.00, and 2.50 in mol%). Luminescence properties of the glasses were studied under two excitations of 585 and 750 nm for downconversion. From both excitations, the results show emission bands in NIR region corresponding to the transitions between4F3/2 → 4I9/2(900 nm),4F3/2 → 4I11/2(1,060 nm), and4F3/2 → 4I13/2(1,345 nm). The luminescence intensity obtained with 585 nm excitation was stronger than 750 nm, with the strongest NIR emission at 1,060 nm. The upconversion emission spectrum exhibits strong fluorescence bands in the UV region at 394 nm (λex=591 nm). The processes are associated with excited state absorption (ESA) from4F3/2level to4D3/2level and it is the radiative decay from the4D3/2to ground levels (4D3/2 → 4I13/2) which are responsible for the emission at 394 nm.

Magnetic behaviors of Ti50Zr33Ni17 quasicrystals measured by VSM

2009 ◽  
Vol 224 (1-2) ◽  
Author(s):  
Yunman Lee ◽  
Jae-kyun Jeon ◽  
Hyemin Shin ◽  
Jae-yong Kim
Keyword(s):  
Magnetic Properties ◽  
Spin Glass ◽  
Rapid Quenching ◽  
Aperiodic Structure ◽  
Quenching Method ◽  
Magnetic States

AbstractQuasicrystals made with Ti, Zr and Ni are good candidate materials studying the magnetic properties of aperiodic structure because the role of Ni in stabilization of the quasicrystal phase is important. Various magnetic states in quasicrystals have been reported including diamagnetism, paramagnetism, spin glass, ferromagnetism and ferrimagnetism. We prepared Ti–Zr–Ni quasicrystals by rapid quenching method. The magnetization (

Magnetic Properties of Intercalated Zinc Hexacyanoferrate (II)

2010 ◽  
Vol 168-169 ◽  
pp. 169-172
Author(s):  
Tatiana A. Denisova ◽  
Lidia G. Maksimova ◽  
Dina G. Kellerman ◽  
M.A. Melkozerova ◽  
Elena V. Zabolotskaya ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Molecular Mechanism ◽  
Magnetic Moments ◽  
Magnetic Behavior ◽  
Channel Structure ◽  
Nickel Ions ◽  
Behavior Study ◽  
Zinc Hexacyanoferrate

The results of magnetic behavior study of nickel ions, which were introduced into Zn2Fe(CN)6∙5.5H2O with channel structure, are presented. It was shown that nickel cations replace a part of Zn2+ ions or locate in the channels of lattice via the molecular mechanism sorption. It is shown that the magnetic moments μNi of the sorption products strongly depend on the content of Ni2+ ions. The values of μNi of the samples with Ni/Fe(CN)6=2.26 and 2.86 are great ~ 3.9 and 4.4 μB respectively and close to the value typical of free Ni2+ ions μ =4.47μB.

Sign in / Sign up

Export Citation Format

Share Document