Abstract
To investigate the Yb3+ doping effect on the upconversion emissions and temperature sensing properties of the Er3+ doped smart ferroelectric ceramics, (Ba0.85Ca0.15)0.994−xZr0.1Ti0.9O3–0.006Er3+/xYb3+ (x=0, 0.005, 0.01, 0.015, 0.025 and 0.035) have been synthesized by the conventional solid-state reaction process. The results illustrate that the ferroelectric and piezoelectric properties decrease with the increment of Yb3+ doping content. The green and red upconversion emission intensities of the ceramics excited under 980nm increase with the increasing Yb3+ content and achieve the maximal value at x=0.015. Based on the fluorescence intensity ratio of green emissions at 525 and 550nm, the temperature sensing properties of the optimized composition of the prepared ceramics (x=0.015) were studied. The ceramics as temperature sensing materials can be operated in a wide temperature range of 173–573K, and the maximum sensitivity achieves 0.0068K−1. It was demonstrated that the comprehensive temperature sensing properties achieved here is better than the previous reported results based on the same technology.
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