ELECTROMAGNETIC SHIELDING EFFECT PROPERTIES OF KAOLINITE/PVA COMPOSITE IN ELECTROMAGNETIC POLLUTION ENVIRONMENT

Öz

In this study, the traditional mixed oxides method was used to create kaolinite-PVA composites. The single phase kaolinite compound with the chemical equation Al2Si2O5(OH)4 was generated after sintering at 1150°C for 4 h. For the structural investigation, various quantities of kaolinite–PVA were generated. X-ray diffraction (XRD) was carried out for the structural analysis, which indicated that second phase did not form in Al2Si2O5(OH)4. In addition, by using Al2Si2O5(OH)4/PVA compositions and epoxy powder in various proportions, microwave shielding effectiveness composites were manufactured by hot pressing method. Utilizing a network analyser device, the microwave shielding effect of Al2Si2O5(OH)4/PVA composites were investigated in the range of 6-18 GHz. A minimum shielding effect value of -47.02 dB was obtained at 6.92 GHz at 1.4 mm thickness. The Al2Si2O5(OH)4-PVA compounds were produced as composite material and their properties were characterized for shielding effect. To work in higher and required frequency bands, by adjusting the amount of components in the composites, the performance of the microwave shielding effect can be changed.

Anahtar Kelimeler

• Kaolinite
• microwave electromagnetic shielding effect
• matrix composite
• PVA

ELEKTROMANYETİK KİRLİLİK ORTAMINDA KAOLİNİT/PVA KOMPOZİTLERİN ELEKTROMANYETİK KALKANLAMA ÖZELLİKLERİ

Öz

Bu çalışmada, kaolinit-PVA kompozitlerini oluşturmak için geleneksel oksitlerin karışımı yöntemi kullanılmıştır. Al2Si2O5(OH)4 kimyasal denklemine sahip tek fazlı kaolinit bileşiği, 1150°C'de 4 saat sinterlendikten sonra elde edildi. Yapısal araştırma için çeşitli miktarlarda kaolinit-PVA üretildi. Yapısal analiz için X-ışını kırınımı (XRD) yapıldı, bu da Al2Si2O5(OH)4'te ikincil fazın oluşmadığını gösterdi. Ayrıca çeşitli oranlarda Al2Si2O5(OH)4-PVA bileşimleri ve epoksi tozu kullanılarak mikrodalga kalkanlama etkili kompozitler sıcak presleme yöntemiyle üretilmiştir. Bir ağ analizör cihazı kullanılarak, Al2Si2O5(OH)4/PVA kompozitlerinin mikrodalga ekranlama etkisi 6-18 GHz aralığında incelenmiştir. 1.4 mm kalınlıkta 6.92 GHz'de minimum -47.02 dB ekranlama etkisi değeri elde edilmiştir. Al2Si2O5(OH)4/PVA bileşikleri kompozit malzeme olarak üretilmiş ve kalkanlama etkisi için özellikleri karakterize edilmiştir. Daha yüksek ve gerekli frekans bantlarında çalışmak için, kompozitlerdeki bileşenlerin miktarı ayarlanarak, mikrodalga kalkanlama etkisi performansı değiştirilebilir.

Anahtar Kelimeler

• Kaolinit
• mikrodalga kalkanlama etkinliği
• matriks kompozit
• PVA.

Teşekkür

Bu çalışma yardımları asla unutulmayacak Salim Şahin ve Emsal Şahin, Prof. Dr. Ayhan Mergen anısına ithafendir.

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