物質掺進confined幾何結構內所表現出來的性質，與此物質的塊狀固態有根本上的不同。將鉛灌入矽酸鹽類玻璃的奈米多孔隙陣列中所展現的超導性，可由電性、磁性和熱性測量來加以研究之。鉛在多孔玻璃中可將原本純鉛塊材的臨界場大小提升約40倍。
外加場、臨界場和各自所對應臨界溫度之間的關係遵守一經驗關係式Hc(T) = Hc(0)[1 –(T/Tc)2]。當外加磁場小於803Oe時，可從M'、M"、d(M/H)/dT、[C(H) – C(40kOe)]等物理量對溫度的關係曲線觀察到兩個突起峰。這些結果暗示了鉛多孔玻璃內有兩種不同的超導機制共存。

Properties of materials in confined geometries can differ significantly from those of bulk samples. Superconductivity of lead in nanoporous silicate matrices was studied by electrical, magnetic and thermal measurements. The critical field of lead in porous glass is strongly enhanced nearly 40 times of magnitude larger than the thermodynamic critical field of bulk lead.
The critical magnetic field follows the empirical relation Hc(T) = Hc(0)[1 –(T/Tc)2]. In a field lower than 803 Oe, there are two peaks in M',M", d(M/H)/dT, and C(H) – C(40kOe) measurements. These results suggest two different kinds of superconducting mechanisms coexist for lead in porous glass. This coexistence of two kinds of superconductivities is not observed in gallium and indium embedded in a porous glass.

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