Absorbability of Highly Porous Aluminum Oxide Ceramics

Abstract

Highly porous aluminum oxide ceramics were synthesized by various low energy consumption techniques. This work demonstrates the efficiency of the preparation technique to tailor the structure of the materials. The drying method was varied and applied in vacuum (freeze drying), under supercritical conditions, and at atmospheric pressure. The pore system and the absorbability can be significantly affected by the conditions of the drying process. The absorbability of porous materials was compared basically for organic compounds. The gas and liquid adsorption measurements were carried out on a gas chromatography and mass spectrometry instrument. The absorbability of several porous aluminum oxide materials was compared to the adsorption data of pure carbon.

Development of Wave Generation Module for Small Ships Using Dielectric Elastomer

“…DE is based on a very simple structure comprising an elastomer sandwiched between two stretchable electrodes [4,5,8]. As the term "artificial muscle" implies, DE is often used in the actuator mode, which utilizes the coulombic attraction forces that occur between the electrodes to deform the elastomer.…”

“…As the term "artificial muscle" implies, DE is often used in the actuator mode, which utilizes the coulombic attraction forces that occur between the electrodes to deform the elastomer. The DE film can be made using several well-known techniques including spin coating, dip coating and casting [5,9,10].…”

“…We can develop simple analytical equations to describe this generator mode of operation [4,5,20]. These equations can be understood by noting that a DE generator is basically a capacitor whose capacitance varies as the DE stretches and contracts.…”

“…This active polymer is made from the acrylic polymer (3M corp., VHB4910). The electrode was based on carbon black with a polymer binder [5,[8][9][10]. The electrodes were made by mixing carbon black and a polymer binder (silicone adhesive) in toluene (C 7 H 8 ), and dipping polymer into this solution.…”

“…However, the conventional wave generators are large, expensive, and unable to efficiently generate electric power with small amplitude waves, limiting their widespread usage [2][3][4]. To solve these problems, wave-power generators, using DE (dielectric elastomer), installed on the buoy were developed [4,5]. DE transducers are elastomeric materials that enable electric power generation by their expansion and contraction.…”