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arXiv · 2507.00614

Structural, dielectric, and ferroelectric characteristics of the low-temperature sintered 65PMN-35PT sample for electroceramic applications

B. Ramachandran·N. Sudarshan·G. Mangamma·M. S. Ramachandra Rao
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Abstract

A single-phase 65PMN-35PT ceramic was synthesized at a relatively low temperature (875 oC) using a modified columbite method. X-ray diffraction analysis confirmed the single-phase formation of perovskite 65PMN-35PT with a tetragonal structure. Morphological studies indicated that the sample consisted of small grains with a size of about 2 micro-m. The dielectric properties of the material demonstrate its relaxor behavior near the ferroelectric transition temperature, TC = 457 K. The saturation and remnant polarization values of approximately 25.9 and 20.1 micro-C cm-2 were achieved for an electrically poled sample. Additionally, the poling induced a negative internal electric field of about -0.2 kV cm-1 was detected due to the presence of ferroelectric nano-grains in this bulk 65PMN-35PT sample. These observed characteristics of the pyrochlore-free 65PMN-35PT ceramic are similar to those of its single-crystal counterpart.

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B. Ramachandran, N. Sudarshan, G. Mangamma, M. S. Ramachandra Rao. 2025-07-01. Structural, dielectric, and ferroelectric characteristics of the low-temperature sintered 65PMN-35PT sample for electroceramic applications. https://doi.org/10.1007/s10832-025-00423-y

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