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Mixed conduction in BaF2 nanocrystals under high pressure

机译:BaF 2 纳米晶体在高压下的混合导电

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The charge transport behavior of barium fluoride nanocrystals has been investigated by in situ impedance measurement up to 23 GPa. It was found that the parameters changed discontinuously at each phase transition. The charge carriers in BaF2 nanocrystals include both F? ions and electrons. Pressure makes both the F? ions diffusion and electronic transport more difficult. The defects at grains dominate the electronic transport process. Pressure could make the charge–discharge processes in the Fm3m and Pnma phases more difficult. The electron conduction plays a dominant role in the transport process. In the Fm3m and Pnma phases, the electron transference number increases with increasing pressure.
机译:通过原位阻抗测量,研究了氟化钡纳米晶体的电荷输运行为,最高可达到23 GPa。发现参数在每个相变处不连续地改变。 BaF 2 纳米晶体中的载流子包括F 离子和电子。压力使F 离子的扩散和电子传输更加困难。晶粒缺陷主导着电子传输过程。压力会使 Fm 3 m Pnma 相的充放电过程更加困难。电子传导在运输过程中起主要作用。在 Fm 3 m Pnma 相中,电子转移数随压力的增加而增加。

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