Published 2010 | Version v1
Miscellaneous Open

Synthesis and characterization of cobalt and nickel ferrites containing nanoparticles dispersed in silicon

Creators

  • 1. Universidade Federal do Ceara (UFC), Fortaleza, CE (Brazil). Dept. de Quimica Analitica e Fisico-Quimica. Lab. de Adsorcao e Catalise
  • 2. Centro Brasileiro de Pesquisas em Fisica (CBPF), Rio de Janeiro, RJ (Brazil). Dept. de Fisica Experimental

Description

Cobalt and nickel ferrites containing nanoparticles dispersed in silicon oxides were prepared via polymeric precursor method. The samples were characterized by X-ray diffraction (XDR), Fourier-transform infrared spectroscopy (FTIR), Moessbauer spectroscopy (MS) and N2 adsorption/desorption isotherms (BET). The analysis results of FTIR, XRD and MS revealed the presence of nickel and cobalt ferrite besides the existence of γ-Fe2O3. Additionally, Moessbauer spectroscopy measurements at 300 K show that nanoparticles are in the superparamagnetic regime being blocked at 4.2 K. Furthermore, all the solids showed by nitrogen adsorption/desorption isotherms profiles characteristic of mesoporous materials. (author)

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Additional details

Additional titles

Original title (Portuguese)
Sintese e carcacterizacao de ferritas de cobalto e niquel contendo nanoparticulas dispersas em oxido de silicio

Publishing Information

Imprint Pagination
8 p.
Report number
INIS-BR--9050

Conference

Title
Brazilian congress on engineering and materials science
Original Conference Title
19. CBECIMAT: Congresso brasileiro de engenharia e ciencia dos materiais
Acronym
19. CBECIMAT
Dates
21-25 Nov 2010
Place
Campos do Jordao, SP (Brazil)

INIS

Country of Publication
Brazil
Country of Input or Organization
Brazil
INIS RN
42046201
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Resource subtype / Literary indicator
Conference
Descriptors DEI
ABSORPTION SPECTROSCOPY; ADSORPTION; ADSORPTION ISOTHERMS; COBALT; CRYSTALLOGRAPHY; DIFFUSE SCATTERING; FOURIER TRANSFORMATION; INFRARED RADIATION; INFRARED SPECTRA; MOESSBAUER EFFECT; NICKEL; POLYMERIZATION; RECOILS; RESONANCE FLUORESCENCE; SILICON; SILICON OXIDES; STRUCTURAL CHEMICAL ANALYSIS; X RADIATION; X-RAY DIFFRACTION
Descriptors DEC
CHALCOGENIDES; CHEMICAL REACTIONS; COHERENT SCATTERING; DIFFRACTION; ELECTROMAGNETIC RADIATION; ELEMENTS; EMISSION; FLUORESCENCE; INTEGRAL TRANSFORMATIONS; IONIZING RADIATIONS; ISOTHERMS; LUMINESCENCE; METALS; OXIDES; OXYGEN COMPOUNDS; PHOTON EMISSION; RADIATIONS; SCATTERING; SEMIMETALS; SILICON COMPOUNDS; SORPTION; SPECTRA; SPECTROSCOPY; TRANSFORMATIONS; TRANSITION ELEMENTS

Optional Information

Notes
Code: 213-040.pdf