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- Title
Influence of Nd doping on microwave dielectric properties of SrTiO<sub>3</sub> ceramics.
- Authors
Bian, Wenjie; Lu, Xiaochi; Li, Yaoyao; Min, Chengfa; Zhu, Haikui; Fu, Zhenxiao; Zhang, Qitu
- Abstract
Sr1−<italic>x</italic>Nd<italic>x</italic>TiO3 (<italic>x</italic> = 0.08–0.14) ceramics were prepared by conventional solid-state methods. The analysis of crystal structure suggested Sr1−<italic>x</italic>Nd<italic>x</italic>TiO3 ceramics appeared to form tetragonal perovskite structure. The relationship between charge compensation mechanism, microstructure feature and microwave dielectric properties were investigated. Trivalent Nd3+ substituting Sr2+ could effectively decrease oxygen vacancies. This reduction and relative density were critical to improve Q × <italic>f</italic> values of Sr1−<italic>x</italic>Nd<italic>x</italic>TiO3 ceramics. For <italic>ε</italic><italic>r</italic> values, incorporation of Nd could restrain the rattling of Ti4+ cations and led to the reduction of dielectric constant. The <italic>τ</italic><italic>f</italic> values were strongly influenced by tilting of oxygen octahedral. The <italic>τ</italic><italic>f</italic> values decreased from 883 to 650 ppm/°C with <italic>x</italic> increasing from 0.08 to 0.14. A better microwave dielectric property was achieved for composition Sr0.92Nd0.08TiO3 at 1460 °C: <italic>ε</italic><italic>r</italic> = 160, Q × <italic>f</italic> = 6602 GHz, <italic>τ</italic><italic>f</italic> = 883 ppm/°C.
- Subjects
NEODYMIUM; DIELECTRIC properties of perovskite; CRYSTAL structure; MICROWAVES; ELECTRONIC ceramics
- Publication
Journal of Materials Science: Materials in Electronics, 2018, Vol 29, Issue 4, p2743
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-017-8201-y