弛豫铁电单晶的热释电性能及其在红外探测器中的应用

Q4 Materials Science

Kuei Suan Jen Hsueh Pao/ Journal of the Chinese Ceramic Society Pub Date : 2014-03-01 DOI:10.1002/9781118771402.CH1

Long Li, Haosu Luo, Xiangyong Zhao, Xiaobing Li, Bo Ren, Qing Xu, Wenning Di

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引用次数: 2

摘要

基于弛豫剂的铁电单晶(即铌酸铅镁-钛酸铅(PMNT)、锰掺杂PMNT、铌酸铅铟-铌酸铅镁-钛酸铅(PMNT)和锰掺杂PIMNT均表现出优异的压电性能和热释电性能。PMN-0.26PT和mn掺杂PMN-0.26PT的热释电系数分别为15.3×10-4C/m2 K和17.2×10-4C/m2 K。由于Mn离子的掺杂，二元和三元弛豫单晶的介电损耗从0.3%降低到0.05%，提高了Mn掺杂PMN-0.26PT的探测性能指数(Fd)，从15.3×10-5Pa-1/2to 40.2× 10-5Pa-1/2。Mn-PIMNT的Fdof(23/47/30)是19.5×10-5Pa-1/2。此外，PIMNT(41/17/42)和mn掺杂PIMNT(23/47/30)的居里温度分别为253℃和179℃。采用掺杂锰的PMNT单晶作为敏感元件，多壁碳纳米管作为吸收层，可以得到性能优越的红外探测器。掺锰pmnt基探测器在4Hz时的比探测率为3.0×109 cm·Hz1/2/W，在10Hz时的比探测率为2.21×109 cm·Hz1/2/W，是litao3基探测器的4倍。

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Pyroelectric Performances of Relaxor‐Based Ferroelectric Single Crystals and their Applications in Infrared Detectors

Relaxor-based ferroelectric single crystals(i.e.,lead magnesium niobate-lead titanate(PMNT),Mn-doped PMNT, ternary lead indium niobate-lead magnesium niobate-lead titanate(PMNT)and Mn-doped PIMNT)exhibit a high piezoelectric performance and superior pyroelectric properties.The pyroelectric coefficients of 15.3×10-4C/m2 K and 17.2×10-4C/m2 K were obtained for PMN-0.26PT and Mn-doped PMN-0.26PT,respectively.The dielectric loss of binary and ternary relaxor-based single crystals decreases from 0.3%to 0.05%due to Mn ions doping,enhancing the detectivity figure of merit(Fd)from 15.3×10-5Pa-1/2to 40.2× 10-5 Pa-1/2 for Mn-doped PMN-0.26PT.The Fdof Mn-PIMNT(23/47/30)is 19.5×10-5Pa-1/2.Furthermore,the Curie temperature is 253℃for PIMNT(41/17/42)and 179℃for Mn-doped PIMNT(23/47/30),respectively.By using the Mn-doped PMNT single crystals as sensitive element and multi-walled carbon nanotubes as absorbing layer,we can obtain the superior infrared detector.The specific detectivity of Mn-doped PMNT-based detector is 3.0×109 cm·Hz1/2/W at 4Hz and 2.21×109 cm·Hz1/2/W at 10Hz,respectively,which are four times greater than that of LiTaO3-based detector.

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来源期刊

Kuei Suan Jen Hsueh Pao/ Journal of the Chinese Ceramic Society Materials Science-Materials Chemistry

CiteScore

1.60

自引率

0.00%

发文量

9103

期刊介绍： Journal of the Chinese Ceramic Society was founded in 1957 and published scientific research papers in Chinese or English for Chinese and English academic journals (16 journals). Journal of silicate is a core journal in Chinese, double-effect journal, Chinese excellent scientific journals, 100 outstanding Chinese academic journals, Chinese Association of Science and Technology excellent scientific journals (Category B).