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Volume 45 All articles Published: 3 February 2022 Article ID 0030
SHAMMI KUMAR MAMTA SHANDILYA GUN ANIT KAUR NAGESH THAKUR
Non-toxic lead-free potassium sodium niobate (K$_{0.5}$Na$_{0.5}$NbO$_3$) ceramics were manufactured by using solidstate reaction method. The influences of excessive alkali metal (Na, K) ions concentration (0–20%) on their structural and electro-optical properties have been examined systematically. The structural properties confirmed the perovskite phase having orthorhombic crystal structure without any secondary phase even on the addition of excessive quantities of (Na, K) ions. Optical properties revealed decrease in optical bandgap energy with increase in the (Na, K) ions ratio. Photoluminescence spectrum shows the emission band in the UV–visible region, which makes KNN a suitable candidate for telecommunication devices, optical storage technology and LEDs. Impedance study revealed the negative temperature coefficient of resistance and non-Debye nature of the synthesized samples.
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Bulletin of Materials Science
Volume 46, 2023
All articles
Continuous Article Publishing mode
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Bulletin of Materials Science | News
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Dr Shanti Swarup Bhatnagar for Science and Technology
Posted on October 12, 2020Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
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