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- W2975325769 abstract "Sustainability can be defined as the ability of meet presents needs without compromise the ability of future generations to find their own needs. In this matter, scientists have been warning about natural resource scarcity, and now several researchers are aiming their efforts to develop sustainable technologies. Here, we focus on finding novel uses to biochar, a carbon rich material made from biomass that is usually applied on soil amendment. To expand its applications, biochars were activated using two different methods: a physical activation using CO 2 ; and a chemical one using KOH. We investigate here the dielectric properties of composites made with both activated biochars from white birch, where composites were made using silicone rubber matrix. It was also investigated the influence of composites made with biochar in powder and in flakes. All samples were characterized over the X-band frequency range. Composites made with powder presented a linear permittivity over the frequency range, while composites made with flakes presented oscillations on different frequencies. These oscillations are related to the composite surface, which induces reflection effects because of flakes arrangement in the top surface. Such effects widen opportunities to engineer new materials to be explored as radar-absorbing materials." @default.
- W2975325769 created "2019-10-03" @default.
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- W2975325769 date "2019-09-23" @default.
- W2975325769 modified "2023-09-24" @default.
- W2975325769 title "Dielectric characterization of white birch–activated biochar composites: A sustainable alternative to radar-absorbing materials" @default.
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- W2975325769 doi "https://doi.org/10.1177/0021998319877493" @default.
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