<abstract xmlns="http://www.w3.org/1999/xhtml">Ca2Nd4Ti6O20, a layered perov skite structured material was synthesized via a chemical (citrate sol-gel) route for the first time using nitrates and alkoxide precursors. Phase analysis of a sample sintered at 1625 °C revealed the formation of an orthorhombic (Pbn21) symmetry. The microstructure of the sample after sintering comprised rod-shaped grains of a size of 1.5 to 6.5µm. The room temperature dielectric constant of the sintered sample was 38 at 100 kHz. The remnant polarization (Pr) and the coercive field (Ec) were about 400 μC/cm2 and 8.4 kV/cm, respectively. Impedance spectroscopy revealed that the capacitance (13.7 pF) and activation energy (1.39 eV) of the grain boundary was greater than the capacitance (5.7 pF) and activation energy (1.13 eV) of the grain.</abstract>

Ca2Nd4Ti6O20, a layered perov skite structured material was synthesized via a chemical (citrate sol-gel) route for the first time using nitrates and alkoxide precursors. Phase analysis of a sample sintered at 1625 °C revealed the formation of an orthorhombic (Pbn21) symmetry. The microstructure of the sample after sintering comprised rod-shaped grains of a size of 1.5 to 6.5µm. The room temperature dielectric constant of the sintered sample was 38 at 100 kHz. The remnant polarization (Pr) and the coercive field (Ec) were about 400 μC/cm2 and 8.4 kV/cm, respectively. Impedance spectroscopy revealed that the capacitance (13.7 pF) and activation energy (1.39 eV) of the grain boundary was greater than the capacitance (5.7 pF) and activation energy (1.13 eV) of the grain.

Synthesis and electrical characterization of Ca2Nd4Ti6O20 ceramics

Department of Physics, Islamia College Peshawar, 25120, Khyber Pakhtunkhwa,

Department of Physics, University of Peshawar, 25120, Khyber Pakhtunkhwa,

Laboratory of Electrical Materials, Federal University of Santa Catarina, Florianopolis,

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Synthesis and electrical characterization of CaNdTiO ceramics

Ca2Nd4Ti6O20, a layered perov skite structured material was synthesized via a chemical (citrate sol-gel) route for the first time using nitrates and alkoxide...

Temp. [°C]	Rgb [kW]	Cgb [pF]	Rg [kW]	Cg [pF]
Temp. [°C]	Extracted	from Z˝_max	Extracted	from M˝_max
744	92.13	13.72	35.080	5.71
782	73.82	13.57	28.133	5.70
800	51.03	12.41	22.190	5.66

Elements	Ca [wt.%]	Ti [wt.%]	Nd [wt.%]
Grain (A)	7.2	29.1	63.7
Grain (B)	7.9	30.3	61.7
Grain (C)	7.4	29.8	62.8

Synthesis and electrical characterization of Ca₂Nd₄Ti₆O₂₀ ceramics

Article Category: Research Article

Online veröffentlicht: 27. Apr. 2016

Seitenbereich: 164 - 168

Eingereicht: 31. Aug. 2015

Akzeptiert: 08. Dez. 2015

DOI: https://doi.org/10.1515/msp-2016-0021

Schlüsselwörter
sol-gel, CaNdTiO, electrical properties

© 2016 Wroclaw University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Fig. 5

Fig. 6

Fig. 7

The volumetric ratios of chemical compositions.

Values of R and C extracted from Z˝max and from M˝max.

EDX data of CNT sample sintered at 1625 °C.

Synthesis and electrical characterization of Ca2Nd4Ti6O20 ceramics

Article Category: Research Article

Online veröffentlicht: 27. Apr. 2016

Seitenbereich: 164 - 168

Eingereicht: 31. Aug. 2015

Akzeptiert: 08. Dez. 2015

DOI: https://doi.org/10.1515/msp-2016-0021

Schlüsselwörtersol-gel, CaNdTiO, electrical properties

© 2016 Wroclaw University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Fig. 5

Fig. 6

Fig. 7

The volumetric ratios of chemical compositions.

Values of R and C extracted from Z˝max and from M˝max.

EDX data of CNT sample sintered at 1625 °C.

Synthesis and electrical characterization of Ca₂Nd₄Ti₆O₂₀ ceramics

Schlüsselwörter
sol-gel, CaNdTiO, electrical properties