Hydrothermal preparation and characterization of sheet-like (KxNa1-x)NbO3 perovskites

Deqing Zhang; Zhangjie Cheng; Junye Cheng; Feng Shi; Xiuying Yang; Guangping Zheng; Maosheng Cao

doi:10.1016/j.ceramint.2016.02.170

Hydrothermal preparation and characterization of sheet-like (K_xNa_1-x)NbO₃ perovskites

Deqing Zhang^*, Zhangjie Cheng, Junye Cheng, Feng Shi, Xiuying Yang, Guangping Zheng, Maosheng Cao

^*Corresponding author for this work

School of Material Science and Engineering

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

(K_xNa_1-x)NbO₃ (KNN) powders with sheet-like morphologies were successfully prepared by the hydrothermal synthesis route combined with subsequent heat-treatment processes. When the heat-treated temperature was 600 °C, the (K_xNa_1-x) NbO₃ (0.6≤x≤0.7) perovskite sheets were obtained in the KNN powders. The surface morphology and crystal structure of the KNN sheets were investigated by scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM), respectively. The KNN sheets were in a well-defined hexagonal shape with a thickness of about 100-200 nm and a diameter of 1.5-3 μm. The chemical structure of the KNN sheets was analyzed using Fourier Transform infrared spectroscopy (FTIR) and Raman spectroscopy. A growth mechanism for the sheet-like microstructures was discussed.

Original language	English
Pages (from-to)	9073-9078
Number of pages	6
Journal	Ceramics International
Volume	42
Issue number	7
DOIs	https://doi.org/10.1016/j.ceramint.2016.02.170
Publication status	Published - 15 May 2016

Keywords

Heat treatment
Hydrothermal synthesis
Lead-free piezoelectrics
Perovskite sheets

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10.1016/j.ceramint.2016.02.170

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title = "Hydrothermal preparation and characterization of sheet-like (KxNa1-x)NbO3 perovskites",

abstract = "(KxNa1-x)NbO3 (KNN) powders with sheet-like morphologies were successfully prepared by the hydrothermal synthesis route combined with subsequent heat-treatment processes. When the heat-treated temperature was 600 °C, the (KxNa1-x) NbO3 (0.6≤x≤0.7) perovskite sheets were obtained in the KNN powders. The surface morphology and crystal structure of the KNN sheets were investigated by scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM), respectively. The KNN sheets were in a well-defined hexagonal shape with a thickness of about 100-200 nm and a diameter of 1.5-3 μm. The chemical structure of the KNN sheets was analyzed using Fourier Transform infrared spectroscopy (FTIR) and Raman spectroscopy. A growth mechanism for the sheet-like microstructures was discussed.",

keywords = "Heat treatment, Hydrothermal synthesis, Lead-free piezoelectrics, Perovskite sheets",

author = "Deqing Zhang and Zhangjie Cheng and Junye Cheng and Feng Shi and Xiuying Yang and Guangping Zheng and Maosheng Cao",

year = "2016",

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doi = "10.1016/j.ceramint.2016.02.170",

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T1 - Hydrothermal preparation and characterization of sheet-like (KxNa1-x)NbO3 perovskites

AU - Zhang, Deqing

AU - Cheng, Zhangjie

AU - Cheng, Junye

AU - Shi, Feng

AU - Yang, Xiuying

AU - Zheng, Guangping

AU - Cao, Maosheng

PY - 2016/5/15

Y1 - 2016/5/15

N2 - (KxNa1-x)NbO3 (KNN) powders with sheet-like morphologies were successfully prepared by the hydrothermal synthesis route combined with subsequent heat-treatment processes. When the heat-treated temperature was 600 °C, the (KxNa1-x) NbO3 (0.6≤x≤0.7) perovskite sheets were obtained in the KNN powders. The surface morphology and crystal structure of the KNN sheets were investigated by scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM), respectively. The KNN sheets were in a well-defined hexagonal shape with a thickness of about 100-200 nm and a diameter of 1.5-3 μm. The chemical structure of the KNN sheets was analyzed using Fourier Transform infrared spectroscopy (FTIR) and Raman spectroscopy. A growth mechanism for the sheet-like microstructures was discussed.

AB - (KxNa1-x)NbO3 (KNN) powders with sheet-like morphologies were successfully prepared by the hydrothermal synthesis route combined with subsequent heat-treatment processes. When the heat-treated temperature was 600 °C, the (KxNa1-x) NbO3 (0.6≤x≤0.7) perovskite sheets were obtained in the KNN powders. The surface morphology and crystal structure of the KNN sheets were investigated by scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM), respectively. The KNN sheets were in a well-defined hexagonal shape with a thickness of about 100-200 nm and a diameter of 1.5-3 μm. The chemical structure of the KNN sheets was analyzed using Fourier Transform infrared spectroscopy (FTIR) and Raman spectroscopy. A growth mechanism for the sheet-like microstructures was discussed.

KW - Heat treatment

KW - Hydrothermal synthesis

KW - Lead-free piezoelectrics

KW - Perovskite sheets

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U2 - 10.1016/j.ceramint.2016.02.170

DO - 10.1016/j.ceramint.2016.02.170

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SN - 0272-8842

VL - 42

SP - 9073

EP - 9078

JO - Ceramics International

JF - Ceramics International

IS - 7

ER -

Hydrothermal preparation and characterization of sheet-like (K_xNa_1-x)NbO₃ perovskites

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Keywords

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