In this paper, we report a simple and inexpensive method for fabricating stable superhydrophobic films from flexible carbon nanotube (CNT)/polymer coatings. The CNT/polymer coatings, which do not contain any fluorinated compounds, maintain their superhydrophobicity after bending and pressing and display excellent environmental stability. Furthermore, these superhydrophobic films can be coated onto glass, metals, and polymers, resulting in water-repellent, self-cleaning surfaces exhibiting high water contact angles. Such superhydrophobic coatings have potential applications in bioseparation, microfluidic devices, liquid transportation, and nonwetting surfaces.
Dielectrics (Zn,Mg)TiO3, having a high dielectric constant and a near zero temperature coefficient of resonant frequency are promising materials for microwave applications. In this work, Bi2O3 was added to (Zn,Mg)TiO3 as a low-temperature-sintering dopant. The addition of Bi2O3 significantly improved the densification of (Zn,Mg)TiO3, which were densified below 1000°C. In addition, the decomposition temperature of (Zn,Mg)TiO3 increased as the magnesium substitution increased. Microwave dielectric properties of (Zn,Mg)TiO3 ceramics depend on crystalline structure. By properly adjusting the amount of magnesium, a small temperature coefficient of resonant frequency was obtained for (Zn,Mg)TiO3 dielectrics.
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