Superconducting Y₃Ba₅Cu₈O₁₈ samples were prepared by standard solid-state reaction method in comparison with Y₁Ba₂Cu₃O₇ sample. Resistance vs. temperature of both samples was measured under hydrostatic pressures up to 0.93 GPa using a piston–cylinder pressure cell. Applying the pressure resulted in a decrease in resistance in the normal state and an increase of the transition temperature T_c for both polycrystalline samples. This phenomenon is then explained in terms of the increase in carrier concentrations. Our results show a positive value of \({\mathrm{dT}}_{\mathrm{c}}/\mathrm{dP}\)=1.1 K/GPa and 1.4 K/GPa for Y123 and Y358, respectively.

与Y ₁ Ba ₂ Cu ₃ O ₇样品相比，通过标准的固态反应方法制备了超导Y ₃ Ba ₅ Cu ₈ O ₁₈样品。使用活塞缸压力传感器在高达0.93 GPa的静水压力下测量了两个样品的电阻与温度的关系。施加压力导致两种多晶样品在正常状态下的电阻降低和转变温度T _c的升高。然后根据载流子浓度的增加来解释这种现象。我们的结果显示\（{\ mathrm {dT}} _ {\ mathrm {c}} / \ mathrm {dP} \）为正值Y123和Y358分别为1.1 K / GPa和1.4 K / GPa。