کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1328900 | 1500080 | 2016 | 5 صفحه PDF | دانلود رایگان |
• Single crystals of KNaNbOF5 were grown under hydrothermal conditions.
• Piezoelectric and triboluminescent properties were characterized.
• Piezoelectric measurements yielded a d33 value of ±pCN−1.
• KNaNbOF5 exhibits strong triboluminscence visible to the naked eye as blue sparks.
Single crystals of the noncentrosymmetric KNaNbOF5 polymorph were grown for piezoelectric and triboluminescent measurements. Piezoelectric measurements yielded a d33 value of ±6.3 pCN−1 and an effective electromechanical coupling coefficient of up to 0.1565 in the frequency range 1960–2080 kHz. Crystals of KNaNbOF5 were found to exhibit a strong triboluminscence effect visible to the naked eye as blue sparks when crystals are crushed. This triboluminescence effect is uncommon in that it is likely independent from both the piezoelectric effect and atmospheric electrical discharge. Instead, triboluminescence may originate from crystal defects or be related to an electroluminescence effect.
An optical emission visible to the naked eye as blue sparks is observed when KNaNbOF5 single crystals are fractured.Figure optionsDownload as PowerPoint slide
Journal: Journal of Solid State Chemistry - Volume 236, April 2016, Pages 78–82