In the search for highly responsive dielectric materials, superconducting samples of type (Bi,Pb)-2223 were prepared using the standard solid-state reaction technique, with the addition of three different concentrations of ferrato and mangano-undecatungstosilicate (0.04, 0.12, and 0.20 wt%). The dielectric studies were performed by measuring the parallel capacitance \(C_{p}\) as well as the dielectric loss factor using LCR HiTESTER. The studies were performed at temperature and frequency ranges starting from room temperature down to 98 K and from 50 kHz up to 5 MHz, respectively. The dielectric behavior was investigated by calculating both dielectric constants (\(\varepsilon^{\prime}\) and \(\varepsilon^{\prime\prime}\)), loss tangent (Tanδ) and ac conductivity (σ_ac) as a function of frequency, temperature and addition concentrations of the {FeSiW₁₁} and {MnSiW₁₁} polyoxometalates. The results revealed that the dielectric parameters decrease with increasing frequency at each temperature for all the {FeSiW₁₁}_x(Bi,Pb)-2223 and {MnSiW₁₁}_x(Bi,Pb)-2223 prepared samples. Moreover, \(\varepsilon^{\prime}\) and σ_ac showed a decreasing trend with an increase in temperature in contrast to the increasing trend shown by \(\varepsilon^{\prime\prime}\) and Tanδ. Additionally, \(\varepsilon^{\prime\prime}\) has decreased upon increasing temperature at low frequencies. Accordingly, low {MnSiW₁₁} addition at 0.12 wt% exhibited the highest dielectric constant \(\left( {1.99 \times 10^{7} } \right)\) and ac conductivity \(61.449\) (Ω.m)⁻¹ with minimum dissipation (1.078). Furthermore, the ac conductivity was studied according to the power law, and the frequency exponent was found greater than one \(\left( {1.654 \le S \le 1.759} \right)\) for all the prepared samples.

中文翻译：

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添加过渡金属取代的聚氧钨酸盐对（Bi 1.8 Pb 0.4）Sr 2 Ca 2 Cu 3 O 10 +δ超导相的频率和温度介电性能的影响

在寻找高响应性介电材料时，使用标准的固态反应技术制备了（Bi，Pb）-2223型超导样品，并添加了三种不同浓度的费拉托和锰-十一碳二硅酸盐（0.04、0.12和1。 0.20重量％）。通过使用LCR HiTESTER测量并联电容\（C_ {p} \）以及介电损耗因子来进行介电研究。这些研究分别在室温至98 K和50 kHz至5 MHz的温度和频率范围内进行。通过计算介电常数（\（\ varepsilon ^ {\ prime} \）和\（\ varepsilon ^ {\ prime \ prime} \）来研究介电性能，损耗角正切（Tanδ）和交流电导率（σ _AC）作为{FeSiW的频率，温度和添加浓度的函数₁₁ }和{MnSiW ₁₁ }多金属氧酸盐。结果表明，对于所有制备的{FeSiW ₁₁ } _x（Bi，Pb）-2223和{MnSiW ₁₁ } _x（Bi，Pb）-2223样品，介电参数随温度的升高而降低。此外，\（\ varepsilon ^ {\素} \）和σ _AC表现出与由示于对比的增加趋势的温度上升减小的趋势\（\ varepsilon ^ {\素\素} \）和Tan δ。另外，\（\ varepsilon ^ {\ prime \ prime} \）随着低频温度的升高而降低。因此，低的{MnSiW ₁₁ }添加量为0.12 wt％时显示出最高的介电常数\（\ left（{1.99 \ times 10 ^ {7}} \ right）\）和交流电导率\（61.449 \）  （Ω.m）^-1，耗散最小（1.078）。此外，根据幂定律研究了交流电导率，发现所有准备好的样品的频率指数都大于一个\（\ left（{1.654 \ le S \ le 1.759} \ right）\）。