Oxidation State of Chromium in Red-Shade Ceramic Pigments Based on Solid Solutions with Pyrochlore Structure

2001 ◽  
Vol 206-213 ◽  
pp. 2137-2140 ◽  
Author(s):  
Radostin Pavlov ◽  
V. Blasco ◽  
J.M. Hohemberger ◽  
J.B. Carda
Keyword(s):  
Oxidation State ◽  
Solid Solutions ◽  
Pyrochlore Structure ◽  
Ceramic Pigments

scholarly journals The effect of manganese oxidation state on antiferromagnetic order in SrMn1−xSbxO3 (0 < x < 0.5) perovskite solid solutions

2019 ◽  
Vol 7 (7) ◽  
pp. 2085-2095
Author(s):  
Gennady V. Bazuev ◽  
Alexander P. Tyutyunnik ◽  
Alexander V. Korolev ◽  
Emmanuelle Suard ◽  
Cheuk-Wai Tai ◽  
...  
Keyword(s):  
Solid Solution ◽  
Oxidation State ◽  
Solid Solutions ◽  
Mixed Valence ◽  
Antiferromagnetic Order ◽  
Manganese Oxidation ◽  
Magnetic Structures ◽  
First Time

Two ranges of mixed-valence manganese (Mn3+/Mn4+) SrMn1−xSbxO3 solid solution and corresponding magnetic structures were described for the first time.

Evolution of Iron Electronic State in the Solid Solutions Gd2-xSr1+xFe2O7-δ

2012 ◽  
Vol 194 ◽  
pp. 116-119 ◽  
Author(s):  
Anastasya Shilova ◽  
Irina Chislova ◽  
V. Panchuk ◽  
V. Semenov ◽  
Irina Zvereva
Keyword(s):  
Electronic State ◽  
Oxidation State ◽  
Solid Solutions ◽  
Sol Gel ◽  
Ceramic Technology ◽  
Isovalent Substitution ◽  
The Difference ◽  
Perovskite Type ◽  
Ordered State ◽  
Magnetically Ordered

The present study is devoted to the non-isovalent substitution of Gd+3 for Sr+2 in matrix of Gd2-xSr1+xFe2O7 with perovskite-type intergrowth structure and to the investigation of oxidation state of iron depending on the method of synthesis and the content of solid solutions. Mössbauer spectroscopy showed the difference in the structure of complex ferrite Gd2SrFe2O7 obtained by ceramic technology (iron in single Fe+3 magnetically ordered state) from oxides obtained by the sol - gel technology (Fe+3 in the three different surroundings and presence of Fe+4).

Lilac ceramic pigments based on Ba 0.5 Sr 0.5 Zn 2−x Ni x Si 2 O 7 solid solutions

2016 ◽  
Vol 42 (11) ◽  
pp. 13035-13040 ◽  
Author(s):  
Christian Thieme ◽  
Tina Waurischk ◽  
Changgui Lin ◽  
Christian Rüssel
Keyword(s):  
Solid Solutions ◽  
Ceramic Pigments

Synthese eines Pyrochlors mit TiII: (Ta0.67TiII0.33)2Sm2O7/ Synthesis of a Pyrochlore Containing TiII: (Ta0.67TiII0.33)2Sm2O7

1995 ◽  
Vol 50 (9) ◽  
pp. 1340-1342 ◽  
Author(s):  
E. Peters ◽  
Hk. Müller-Buschbaum
Keyword(s):  
High Temperature ◽  
Oxidation State ◽  
Pyrochlore Structure ◽  
Space Group ◽  
Point Position ◽  
High Temperature Reactions

AbstractHigh temperature reactions using a CO2-LASER led to a TiII containing phase of the composition (Ta0.67TiII0.33Sm2O7, space group O7h - Fd3̄m (No. 227), a = 10.385(2) Å . The oxidation state TiII which is stabilized by incorporation into the cubic pyrochlore structure was proved by the statistical occupation of the 16c point position by a Ta:Ti ratio of 2:1.

scholarly journals Magnetic behavior of Fe-doped of multicomponent bismuth niobate pyrochlore

2021 ◽  
Vol 60 (1) ◽  
pp. 38-46
Author(s):  
Nadezhda A. Zhuk ◽  
Boris A. Makeev ◽  
Sergey V. Nekipelov ◽  
Maria V. Yermolina ◽  
Anna V. Fedorova ◽  
...  
Keyword(s):  
Solid Solutions ◽  
Solid Phase ◽  
Synthesis Method ◽  
Pyrochlore Structure ◽  
Exchange Interactions ◽  
Magnetic Behavior ◽  
Susceptibility Data ◽  
Nexafs Spectroscopy ◽  
Magnetic Dilution ◽  
Paramagnetic Atoms

Abstract Two series of iron-containing solid solutions Bi2Mg1− x Fe x Nb2O9+δ and Bi2MgNb2−2 x Fe2 x O9−δ of pyrochlore structure were obtained by the traditional solid phase synthesis method. The electronic state and character of exchange interactions of iron atoms in solid solutions were investigated by methods of magnetic dilution and NEXAFS-spectroscopy. According to X-ray spectroscopy and magnetic susceptibility data, iron(III) atoms are distributed mainly in octahedral positions of niobium(V) and in a dominant amount are in the charge state of Fe(III) in the form of monomers and exchange-bonded clusters mainly with antiferromagnetic type of exchange. Differences in magnetic behavior of iron-containing solid solutions of both series have been revealed. Antiferromagnetic and ferromagnetic exchange can be realized between iron atoms, which, with increasing concentration of paramagnetic atoms and averaging structure distortions, becomes less significant. The parameters of exchange interactions in clusters and distribution of iron paramagnetic atoms depending on the concentration of solid solutions have been calculated.

scholarly journals Spectral studies of bismuth-containing pyrochlores

2021 ◽  
Vol 2103 (1) ◽  
pp. 012146
Author(s):  
S V Nekipelov ◽  
N A Zhuk ◽  
O V Petrova ◽  
D V Sivkov ◽  
K A Bakina ◽  
...  
Keyword(s):  
Charge State ◽  
Solid Solutions ◽  
Pyrochlore Structure ◽  
Spectral Studies ◽  
Nexafs Spectroscopy ◽  
Cobalt Nickel ◽  
Metal Atoms ◽  
Thermal Stable

Abstract Thermal stable solid solutions of titanates, niobates, and tantalates of bismuth with a pyrochlore structure doped with 3d-metal atoms were studied using XPS and NEXAFS spectroscopy. Based on spectral studies, it was shown that the manganese, cobalt, nickel and copper atoms in these solid solutions have mainly charge state +2 and iron atoms – charge state +3.

scholarly journals Ceramic pigments from CoxNi3-xP2O8 (0 ≤ x ≤ 3) solid solutions

2021 ◽  
Author(s):  
M.A. Tena ◽  
Rafael Mendoza ◽  
Camino Trobajo ◽  
José R. García ◽  
Santiago García-Granda
Keyword(s):  
Solid Solutions ◽  
Ceramic Pigments

Low-toxicity red ceramic pigments for porcelainised stoneware from lanthanide–cerianite solid solutions

2001 ◽  
Vol 3 (5) ◽  
pp. 238 ◽  
Author(s):  
A. García ◽  
M. Llusar ◽  
J. Calbo ◽  
M. A. Tena ◽  
G. Monrós
Keyword(s):  
Solid Solutions ◽  
Ceramic Pigments ◽  
Low Toxicity ◽  
Red Ceramic Pigments
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