Enhanced dielectric and microwave absorption properties of Y2Ti2O7 ceramics by Sr doping

Qinlong Wen; Wancheng Zhou; Hui Gao; Yingying Zhou; Fa Luo; Dongmei Zhu; Zhibin Huang; Yuchang Qing

doi:10.1007/s00339-019-2702-x

Enhanced dielectric and microwave absorption properties of Y₂Ti₂O₇ ceramics by Sr doping

Qinlong Wen, Wancheng Zhou, Hui Gao, Yingying Zhou, Fa Luo, Dongmei Zhu, Zhibin Huang, Yuchang Qing

School of Materials Sience and Engineering

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

8 Scopus citations

Abstract

Sr-doped Y₂Ti₂O₇ has been synthesized by hot-pressing sintering in the vacuum with graphite die. The thermogravimetric analysis, electrical conductivity, dielectric and microwave absorption properties of Y_2-xSr_xTi₂O_7-δ (x = 0.05, 0.1, 0.15, 0.2) investigated. The ε′ of Y_1.8Sr_0.2Ti₂O_7-δ is four times larger than the pure Y₂Ti₂O₇ and twice larger than that of Y_1.8Ca_0.2Ti₂O_7-δ at 8.2 GHz. The ε’’ of Y_2-xSr_xTi₂O_7-δ is also enhanced significantly. The reflection loss of Y_0.85Sr_0.15Ti₂O_7-δ with a thickness of 0.85 mm reaches a maximum absorbing peak of − 29.68 dB and bandwidth (reflection loss ≤ − 5 dB) of 2.9 GHz. These findings pave the way for the development of high dielectric constant materials operating in the 8.2–12.4 GHz region with potential applications in thin and efficient microwave absorber.

Original language	English
Article number	413
Journal	Applied Physics A: Materials Science and Processing
Volume	125
Issue number	6
DOIs	https://doi.org/10.1007/s00339-019-2702-x
State	Published - 1 Jun 2019

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title = "Enhanced dielectric and microwave absorption properties of Y2Ti2O7 ceramics by Sr doping",

abstract = "Sr-doped Y2Ti2O7 has been synthesized by hot-pressing sintering in the vacuum with graphite die. The thermogravimetric analysis, electrical conductivity, dielectric and microwave absorption properties of Y2-xSrxTi2O7-δ (x = 0.05, 0.1, 0.15, 0.2) investigated. The ε′ of Y1.8Sr0.2Ti2O7-δ is four times larger than the pure Y2Ti2O7 and twice larger than that of Y1.8Ca0.2Ti2O7-δ at 8.2 GHz. The ε{\textquoteright}{\textquoteright} of Y2-xSrxTi2O7-δ is also enhanced significantly. The reflection loss of Y0.85Sr0.15Ti2O7-δ with a thickness of 0.85 mm reaches a maximum absorbing peak of − 29.68 dB and bandwidth (reflection loss ≤ − 5 dB) of 2.9 GHz. These findings pave the way for the development of high dielectric constant materials operating in the 8.2–12.4 GHz region with potential applications in thin and efficient microwave absorber.",

author = "Qinlong Wen and Wancheng Zhou and Hui Gao and Yingying Zhou and Fa Luo and Dongmei Zhu and Zhibin Huang and Yuchang Qing",

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doi = "10.1007/s00339-019-2702-x",

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T1 - Enhanced dielectric and microwave absorption properties of Y2Ti2O7 ceramics by Sr doping

AU - Wen, Qinlong

AU - Zhou, Wancheng

AU - Gao, Hui

AU - Zhou, Yingying

AU - Luo, Fa

AU - Zhu, Dongmei

AU - Huang, Zhibin

AU - Qing, Yuchang

PY - 2019/6/1

Y1 - 2019/6/1

N2 - Sr-doped Y2Ti2O7 has been synthesized by hot-pressing sintering in the vacuum with graphite die. The thermogravimetric analysis, electrical conductivity, dielectric and microwave absorption properties of Y2-xSrxTi2O7-δ (x = 0.05, 0.1, 0.15, 0.2) investigated. The ε′ of Y1.8Sr0.2Ti2O7-δ is four times larger than the pure Y2Ti2O7 and twice larger than that of Y1.8Ca0.2Ti2O7-δ at 8.2 GHz. The ε’’ of Y2-xSrxTi2O7-δ is also enhanced significantly. The reflection loss of Y0.85Sr0.15Ti2O7-δ with a thickness of 0.85 mm reaches a maximum absorbing peak of − 29.68 dB and bandwidth (reflection loss ≤ − 5 dB) of 2.9 GHz. These findings pave the way for the development of high dielectric constant materials operating in the 8.2–12.4 GHz region with potential applications in thin and efficient microwave absorber.

AB - Sr-doped Y2Ti2O7 has been synthesized by hot-pressing sintering in the vacuum with graphite die. The thermogravimetric analysis, electrical conductivity, dielectric and microwave absorption properties of Y2-xSrxTi2O7-δ (x = 0.05, 0.1, 0.15, 0.2) investigated. The ε′ of Y1.8Sr0.2Ti2O7-δ is four times larger than the pure Y2Ti2O7 and twice larger than that of Y1.8Ca0.2Ti2O7-δ at 8.2 GHz. The ε’’ of Y2-xSrxTi2O7-δ is also enhanced significantly. The reflection loss of Y0.85Sr0.15Ti2O7-δ with a thickness of 0.85 mm reaches a maximum absorbing peak of − 29.68 dB and bandwidth (reflection loss ≤ − 5 dB) of 2.9 GHz. These findings pave the way for the development of high dielectric constant materials operating in the 8.2–12.4 GHz region with potential applications in thin and efficient microwave absorber.

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ER -

Enhanced dielectric and microwave absorption properties of Y₂Ti₂O₇ ceramics by Sr doping

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