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Xây dựng composite Al2O3@ppy cấu trúc lõi-vỏ với hiệu suất hấp thụ sóng điện từ cao
Tóm tắt
Trong nghiên cứu này, alumina dạng cầu hoa đã được tổng hợp tự động thông qua các quá trình thủy nhiệt và tôi luyện. Quá trình đồng polymer hóa polypyrrole trên bề mặt alumina ở nhiệt độ thấp dựa trên nguyên tắc hiệp lực thành phần đã cho phép xây dựng cấu trúc lõi-vỏ cho các vật liệu Al2O3@ppy, dẫn đến các thuộc tính hấp thụ sóng điện từ xuất sắc. Ảnh hưởng của việc bổ sung alumina và hình thái của các vật liệu đối với tính chất hấp thụ vi sóng của các composite Al2O3@ppy cũng được thảo luận. Nhiều phương pháp đã được sử dụng để đặc trưng hóa vật liệu. Các composite Al2O3@ppy cho thấy hiệu quả khi phù hợp với độ dày 2.5 mm với tổn thất phản xạ tối thiểu (RL) là -65.8 dB ở tần số 11.52 GHz và băng thông hấp thụ hiệu quả tối đa (EAB) là 5.6 GHz tại độ dày phù hợp 2.0 mm. Kết quả cho thấy các composite Al2O3@ppy có thể cung cấp một tham chiếu cho nghiên cứu vật liệu hấp thụ sóng điện từ.
Từ khóa
#Alumina; Polypyrrole; Cấu trúc lõi-vỏ; Hấp thụ sóng điện từ; CompositeTài liệu tham khảo
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