Microstructural and electrical transport properties of uniaxially pressed $$\text {Bi}_{1.65}\text {Pb}_{0.35}\text {Sr}_2\text {Ca}_{2.5}\text {Cu}_{3.5}\text {O}_{10+\delta }$$ Bi 1.65 Pb

Electrical effective parameters of the grains and the Montgomery's method in $$\hbox {Bi}_{1.65}\hbox {Pb}_{0.35}\hbox {Sr}_2\hbox {Ca}_{2.5}\hbox {Cu}_{3.5}\hbox {O}_y$$ Bi 1.65 Pb

“…In this paper we have applied the model developed in reference [7] to (T) measurements obtained by means of the Montgomery's method in Bi 1.65 Pb 0.35 Sr 2 Ca 2.5 Cu 3.5 O y samples with very low anisotropy. Similar behavior of the intragranular properties were obtained by using a different measure method in samples with higher anisotropy [9], but with the same starting composition used here. Thus, the results that will be presented here are an experimental contribution to the verification of the model described in reference [7] for samples with low anisotropy.…”

“…These powders were weighed, mixed thoroughly by hand under isopropanol using an agate mortar and pestle. Other details about the obtaining process, which includes heat treatments at different temperatures for 40 h followed of sequential grounds and pelletizations, can be found elsewhere [9][10][11]. In this case, the compacting pressures of each pellet before the last heat treatment, the dimensions of the sintered pellets and their mass are given in Table 1.…”

“…The masses were measured with 0.1 mg of resolution. After that, the volume fraction of pores and no conductive phases, p, was estimated starting from the resulting density and the structural one [9,12,13].…”

“…Current-voltage (I-V) measurements were performed in order to determine the resistivity tensor components in the paracoherent state [9]. In this experiment, we have used the Montgomery's technique, as described elsewhere [6].…”

“…The diagram displayed in Fig. 2 of the references [7,9] sketches the procedure to get the inter and intragranular magnitudes starting from the transport measurements described above.…”