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Microwave dielectric properties of NaxNd(2-x)/3TiO3 solid solutions

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4 Author(s)
Kagomiya, I. ; Dept. of Mater. Sci. & Eng., Nagoya Inst. of Technol., Nagoya ; Yamada, Y. ; Kakimoto, Ken-ichi ; Ohsato, Hitoshi

NaxNd(2-x)/3TiO3 solid solutions possess tetragonal or orthorhombic perovskite structure, where the A-sites are characterized by 2 kinds of cations (Na+, Nd3+) and vacancies. We have measured microwave dielectric properties of NaxNd(2-x)/3TiO3 solid solutions (x = 0.05 to 0.5) to investigate an effect of the compositional ordering in the A-sites of the perovskite structure. According to powder X-ray diffraction, the A-site is disordered in the composition range of x = 0.29 to 0.5. A compositional ordering (Na+, vacancy / Nd3 +) in Asites appeared when x = 0.05 to 0.2. The quality factor (Qmiddotf), where Q is the inverse of dielectric loss and f is frequency, was found to be slightly improved with decreasing Na content in the range of x = 0.05 to 0.2, suggesting that the Qmiddotf of the NaxNd(2-x)/3TiO3 solid solutions depends on the compositional ordering in A-sites.

Published in:

Ultrasonics, Ferroelectrics and Frequency Control, IEEE Transactions on  (Volume:55 ,  Issue: 12 )

Date of Publication:

December 2008

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