Synthesis and properties of Nasicon-type materials

Ignaszak, Anna; Pasierb, P.; Gajerski, R.; Komornicki, S.

doi:10.1016/j.tca.2004.07.002

Cited by 59 publications

(46 citation statements)

References 18 publications

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“…These are in agreement with TGA results reported by Savitha et al [11] in the study of thermal analysis of Li 2 AlZr(PO 4 ) 3 . A similar trend was also reported [12] for Na 1+x Zr 2 Si x P 3−x O 12 prepared using co-precipitation method [13]. The results obtained in this study is quite different from that has already been reported [14] in which the substitutions of Hf 4+ involved Cr and Fe ions in the crystalline materials.…”

Section: Measurement and Characterization Proceduressupporting

confidence: 64%

Analysis of thermal and electrical conductivity properties of Al substitution LiHf2(PO4)3 chemical solid electrolyte

et al. 2019

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Lithium ion conducting solid electrolytes, lithium aluminum hafnium phosphate (Li 1+x Hf 2−x Al x (PO 4) 3 , x = 0-0.75) are prepared via solid state synthesis technique. Thermo-gravimetric analysis indicates that the thermal decomposition and thermal stability of the reaction mixture is generally affected by a high content of x value substitution. It can be observed that as x content or aluminum substitution increases, the thermal decomposition and thermal stability increase which leads to the sample formation towards higher temperature. For X-ray diffraction analysis, the Rietveld refinement analysis indicates the presence of different types of secondary phases as aluminum content increases. Single phase of lithium hafnium phosphate (LiHf 2 (PO 4) 3) is only achievable in the absence of any aluminum substitution. Furthermore, for the lithium ionic conductivity, the findings indicate that conductivity increases with increase in x substitution in lithium aluminum hafnium phosphate. The highest AC conductivity is observable in the sample with composition x = 0.25 of about 2.5 × 10 −3 Ω −1 m −1 with low activation energy 0.36 eV. The present studies recommend the sample with composition x = 0.25 (Li 1.25 Hf 1.75 Al 0.25 (PO 4) 3) to be a future solid electrolyte material for battery applications.

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Section: Measurement and Characterization Proceduressupporting

confidence: 64%

Analysis of thermal and electrical conductivity properties of Al substitution LiHf2(PO4)3 chemical solid electrolyte

et al. 2019

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“…The formation of ZrO 2 during the densification of NZSP was also observed using other synthesis and processing methods . This is due to an earlier crystallization of ZrO 2 prior to NASICON formation, resulting from the high thermodynamic stability of ZrO 2 and not due to the volatility of reagents (eg, sodium monoxide) at the sintering temperature.…”

Section: Resultsmentioning

confidence: 65%

“…Na 3 Zr 2 (SiO 4 ) 2 (PO 4 ), hereafter abbreviated as NZSP, is the most commonly studied NASICON material that also has excellent electrical properties . The reported conductivity of NZSP varies from 9.2 × 10 −5 to 1.2 × 10 −3 S/cm for conventionally sintered ceramic specimens. Spark plasma sintered samples attain conductivity of 1.8 × 10 −3 S/cm .…”

Section: Introductionmentioning

confidence: 99%

Microstructure–conductivity relationship of Na₃Zr₂(SiO₄)₂(PO₄) ceramics

et al. 2018

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The ionic conductivity of solid electrolytes is dependent on synthesis and processing conditions, ie, powder properties, shaping parameters, sintering time (ts), and sintering temperature (Ts). In this study, Na3Zr2(SiO4)2(PO4) was sintered at 1200 and 1250°C for 0‐10 hours and its microstructure and electrical performance were investigated by means of scanning electron microscopy and impedance spectroscopy. After sintering under all conditions, the sodium super‐ionic conductor‐type structure was formed along with ZrO2 as a secondary phase. The microstructure investigation revealed a bimodal particle size distribution and grain growth at both Ts. The density of samples increased from 60% at 1200°C for 0 hours to 93% at 1250°C for 10 hours. The ionic conductivity of the samples increased with ts due to densification and grain growth, ranging from 0.13 to 0.71 mS/cm, respectively. The corresponding equivalent circuit fitting for the impedance spectra revealed that grain boundary resistance is the prime factor contributing to the changing conductivity after sintering. The activation energy of the bulk conductivity (Ea,bulk) remained almost constant (0.26 eV) whereas the activation energy of the total conductivity (Ea) exhibited a decreasing trend from 0.37 to 0.30 eV for the samples with ts = 0 and 10 hours, respectively—both sintered at 1250°C. In this study, the control of the grain boundaries improved the electrical conductivity by a factor of 6.

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“…2a-d. All micrographs clearly indicate that sintering temperature plays a very important role for differences in microstructural features. The sample prepared by the solid state reaction method always gives a denser microstructure than the sample prepared by the co-preparation method [23]. The grain size of all samples varies from 1 µm to 30 µm.…”

Section: Microstructural Analysismentioning

confidence: 94%

Optimization of High Conducting Na3Zr2Si2PO12 Phase by new Phosphate Salt for Solid Electrolyte

Jha

Pandey

Singh

2016

Silicon

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A composition of NASICON (Na 3 Zr 2 Si 2 PO 12 ) was synthesized by the solid-state reaction method using a new compound Na 2 HPO 4 2H 2 O. The X-ray diffraction patterns of all samples exhibit monoclinic Na 3 Zr 2 Si 2 PO 12 as a major phase with a very small amount of monoclinicZrO 2 . The maximum relative density (97 %) and maximum conductivity is obtained in the samples sintered at 1200 • C (N3) which is slightly higher than β-Al 2 O 3 . The activation energy is ∼ 0.20 eV for the N3 sample which is lower than for β-Al 2 O 3 . The dilatometeric study and Arrhenius plots confirmed a phase transition of NASICON from monoclinic to rhombohedral. The micro-structural study of the samples done by scanning electron microscopy (SEM) indicated a significant influence of the processing conditions on the microstructures. Raman spectroscopy demonstrated that the sample N3 exhibits minor structural changes compared to other samples.

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Synthesis and properties of Nasicon-type materials

Cited by 59 publications

References 18 publications

Analysis of thermal and electrical conductivity properties of Al substitution LiHf2(PO4)3 chemical solid electrolyte

Analysis of thermal and electrical conductivity properties of Al substitution LiHf2(PO4)3 chemical solid electrolyte

Microstructure–conductivity relationship of Na₃Zr₂(SiO₄)₂(PO₄) ceramics

Optimization of High Conducting Na3Zr2Si2PO12 Phase by new Phosphate Salt for Solid Electrolyte

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Synthesis and properties of Nasicon-type materials

Cited by 59 publications

References 18 publications

Analysis of thermal and electrical conductivity properties of Al substitution LiHf2(PO4)3 chemical solid electrolyte

Analysis of thermal and electrical conductivity properties of Al substitution LiHf2(PO4)3 chemical solid electrolyte

Microstructure–conductivity relationship of Na3Zr2(SiO4)2(PO4) ceramics

Optimization of High Conducting Na3Zr2Si2PO12 Phase by new Phosphate Salt for Solid Electrolyte

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Microstructure–conductivity relationship of Na₃Zr₂(SiO₄)₂(PO₄) ceramics