Untitled

Barranco, A. Peláiz; Piñar, F. Calderón; Martínez, Osmany Pérez; Tera, A. Huanosta

doi:10.1023/a:1018501402179

Cited by 9 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The pyrochlore values are found to increase with increasing ions additions (from 3 % to 6 %), which is in agreement with the value reported for doped PZT [32].…”

Section: Xrd Resultssupporting

confidence: 90%

Structural and electrical characterization of La³⁺substituted PMS-PZT (Zr/Ti:60/40) ceramics

Menasra

Necira

Bounabe

et al. 2018

Materials Science-Poland

View full text Add to dashboard Cite

Pb (1−x) La x [(Zr 0.6 Ti 0.4 ) (1−x) (Mn 1/3 Sb 2/3 ) x ]O 3 ceramics with x = 0.02, 0.03, 0.04, and 0.05 were synthesized by using a conventional solid state reaction route. The influence of La, Mn, and Sb contents on phase structure, microstructure, and electric properties were investigated. The results of X-ray diffraction (XRD) show that the phase structure of the ceramics transforms from rhombohedral phase to tetragonal phase. However, the minority pyrochlore phase appears on the micrographs of XRD and SEM if the doping concentration is greater than 2 mol%. The grain size of the ceramics gradually increases (from 1.36 µm to 1.57 µm) with increasing doping. The dielectric properties of the ceramics have been measured as a function of temperature in the range of 20°C to 430°C at 1 kHz. The results indicate that the transition temperature and the maximum dielectric constant decrease with increasing PL-PMS content in the system. These results clearly show the significance of PL-PMS in controlling the dielectric behavior of the PL-PMS-PZT system.

show abstract

“…The pyrochlore values are found to increase with increasing ions additions (from 3 % to 6 %), which is in agreement with the value reported for doped PZT [32].…”

Section: Xrd Resultssupporting

confidence: 90%

Structural and electrical characterization of La³⁺substituted PMS-PZT (Zr/Ti:60/40) ceramics

Menasra

Necira

Bounabe

et al. 2018

Materials Science-Poland

View full text Add to dashboard Cite

show abstract

“…4͑b͒, 4͑d͒, and 6͑b͔͒, together with the high values of the dc resistivity in the PFN1075 and PFN1200 samples, can be explained by assuming that the conduction mechanisms previously dis- cussed contribute fundamentally to the polarizability inside the grains because potential barriers ͑induced by space charge͒ in the grain boundary inhibit the inter-grain conductivity. 12,27,34,35 The anomaly observed in the ac conductivity, above the ferro-paraelectric transition temperature ͑PE I region͒ is of particular interest. 4͑b͒, 4͑d͒, and 4͑f͔͒ is representative of a new thermally activated mechanism.…”

Section: ͑4͒mentioning

confidence: 99%

Frequency-temperature response of ferroelectromagnetic Pb(Fe1∕2Nb1∕2)O3 ceramics obtained by different precursors. Part I. Structural and thermo-electrical characterization

Raymond¹,

Font

Suárez-Almodovar

et al. 2005

Journal of Applied Physics

204

View full text Add to dashboard Cite

With the purpose of fabricating ceramics where ferroelectric and magnetic order coexist, ceramics of Pb͑Fe 1/2 Nb 1/2 ͒O 3 have been prepared using the traditional ceramic method following three different routes. The first is a direct via starting from oxide reagents and the other two use different kinds of FeNbO 4 precursors with either monoclinic or orthorhombic structures. Crystallographic and surface morphological studies were carried out by the powder x-ray diffraction and scanning microscopy techniques. The presence of Fe 2+ , detrimental to the ferroelectric and magnetic performance, was evaluated by x-ray photoelectron spectroscopy. The samples showed no structural differences, uniformly distributed grains, a ferro-paraelectric transition temperature at 110°C and a normal diffuse phase transition ͑nonrelaxor behavior͒. Differences in the degree of diffuseness, densities and grain size were observed depending on the kind of precursor. Measurements of dc and ac electrical resistivity, dielectric constant and dielectric loss were made as functions of temperature from room temperature to 250°C, at different frequency values ͑between 20 Hz and 1 MHz͒. Four conduction mechanisms were identified: hopping charge corresponding to low temperatures, small polarons and oxygen vacancies conduction at intermediate temperatures, and intrinsic ionic conduction at high temperatures. The best set of values of dielectric loss and dielectric constant, from the ferroelectricity point of view, were obtained when the precursor with orthorhombic structure was employed.

show abstract

“…[1][2][3][4][5] Composite materials composed of a flexible polymer matrix and high-dielectric ceramic fillers are promising and effective alternatives for new generation PCBs instead of conventional counterparts. 6 The production of polymeric composites based on ceramics such as lead magnesium niobate-lead titanate (PMN-PT), [7][8][9] calcium barium zirconate titanate (BCZT), 10 lead titanate based (PSTM), 11 lead-magnezium-niobate (PMN), 12 and lead zirconium titanate (PZT) 13,14 have been reported in the literature. However, in both academia and industry the application of lead-based capacitors have been limited due to their known hazardous and toxic effects.…”

Section: Introductionmentioning

confidence: 99%

Dielectric performance of composites of BaTiO₃ and polymers for capacitor applications under microwave frequency

Baştürk

Dancer

McNally

2021

J of Applied Polymer Sci

View full text Add to dashboard Cite

Composites of nano‐sized barium titanate (BaTiO3) with volume fractions up to 0.5 and poly(butylene terephthalate) (PBT) or linear low‐density polyethylene (LLDPE) were made via extrusion. Scanning electron microscopy demonstrated that BaTiO3 is well dispersed in the polymer matrices. The crystalline content (DSC) and thermal stability (TGA) of both polymers decreased with increasing BaTiO3 loading. Dielectric properties of the composites were measured using a vector network analyzer. Both dielectric permittivity and tangent loss increased with increasing BaTiO3 content. At 2.45 GHz, the dielectric permittivity for 48 vol% BaTiO3‐filled LLDPE and 43 vol% BaTiO3‐filled PBT was 25 and 21.2, respectively. There was a good fit between the Lichtenecker model and experimental data obtained up to a certain value, with the permittivity variations being dependent on volume fraction. The improved dielectric performance achieved on inclusion of BaTiO3 confirms both composite systems as potential candidates for microwave frequency capacitor applications.

show abstract

Untitled

Cited by 9 publications

References 6 publications

Structural and electrical characterization of La³⁺substituted PMS-PZT (Zr/Ti:60/40) ceramics

Structural and electrical characterization of La³⁺substituted PMS-PZT (Zr/Ti:60/40) ceramics

Frequency-temperature response of ferroelectromagnetic Pb(Fe1∕2Nb1∕2)O3 ceramics obtained by different precursors. Part I. Structural and thermo-electrical characterization

Dielectric performance of composites of BaTiO₃ and polymers for capacitor applications under microwave frequency

Contact Info

Product

Resources

About

Untitled

Cited by 9 publications

References 6 publications

Structural and electrical characterization of La3+substituted PMS-PZT (Zr/Ti:60/40) ceramics

Structural and electrical characterization of La3+substituted PMS-PZT (Zr/Ti:60/40) ceramics

Frequency-temperature response of ferroelectromagnetic Pb(Fe1∕2Nb1∕2)O3 ceramics obtained by different precursors. Part I. Structural and thermo-electrical characterization

Dielectric performance of composites of BaTiO3 and polymers for capacitor applications under microwave frequency

Contact Info

Product

Resources

About

Structural and electrical characterization of La³⁺substituted PMS-PZT (Zr/Ti:60/40) ceramics

Structural and electrical characterization of La³⁺substituted PMS-PZT (Zr/Ti:60/40) ceramics

Dielectric performance of composites of BaTiO₃ and polymers for capacitor applications under microwave frequency