Influence of barrier discharge plasma on thermophysical, dielectric, conductivity and photoluminescence properties of low-density polyethylene doped with CaGa2S4:Eu2+

IF 1.6 4区物理与天体物理 Q3 PHYSICS, CONDENSED MATTER

The European Physical Journal B Pub Date : 2024-09-05 DOI:10.1140/epjb/s10051-024-00774-5

T. D. Ibragimov, O. B. Tagiyev, E. G. Asadov, I. S. Ramazanova

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Abstract

The effect of barrier discharge plasma on the thermophysical, dielectric, conductivity and photoluminescent properties of CaGa₂S₄:Eu²⁺doped low-density polyethylene have been investigated. It is shown that the enthalpy and entropy of melting and solidification decrease sharply with the inclusion of filler (3 vol%) and then increase with increasing filler concentration. At the same time, these physical quantities increases in all cases after exposure to the gas discharge. This increase is negligible for pure polyethylene, but significant for composites. With increasing filler concentration, the dielectric permittivity increases and agrees well with the Maxwell–Garnett theory. It is shown that the conductivity has a hopping character and mainly increases with increasing filler concentration. Dielectric permittivity increases and conductivity as well as photoluminescence decrease after the action of gas discharge.

Graphical abstract

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阻挡放电等离子体对掺杂 CaGa2S4:Eu2+ 的低密度聚乙烯的热物理特性、介电特性、导电特性和光致发光特性的影响

研究了阻挡放电等离子体对掺杂 CaGa2S4:Eu2+ 的低密度聚乙烯的热物理性能、介电性能、电导率和光致发光性能的影响。结果表明，熔化焓和凝固熵随着填料的加入（3 Vol%）而急剧下降，然后随着填料浓度的增加而升高。同时，在所有情况下，这些物理量在暴露于气体放电后都会增加。对于纯聚乙烯来说，这种增加可以忽略不计，但对于复合材料来说则非常明显。随着填料浓度的增加，介电常数也会增加，这与 Maxwell-Garnett 理论十分吻合。研究表明，电导率具有跳跃特性，主要随着填料浓度的增加而增加。气体放电后，介电常数增加，电导率和光致发光降低。

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