Frequency dependence of (a) and (b) for the lead-free ceramics at room temperature: ×—KNLNT; △—KNLNTS; ◆—BNKBT; ○—BNKLBT.
Schematic diagram of the pyroelectric sensor.
Schematic setup of the measurement of current response to incident radiation.
Frequency dependence of for lead-free BNKLBT pyroelectric sensors. Element thickness: ●—; ◻—; ▲—.
Pyroelectric coefficient and figures of merit of the PZT and lead-free ceramic samples.
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