Investigation of SiO2 Coatings Synthesized by Acid and Base Catalysis Sol-Gel Dip Coating Technique

Year 2019, Volume: 21 Issue: 63, 941 - 947, 20.09.2019

Tolga Tavşanoğlu

https://doi.org/10.21205/deufmd.2019216322

Abstract

Present study deals with the effect of acid and base catalysis on SiO2 coating properties that were synthesized by sol-gel dip coating technique. Microstructural properties of the coatings were characterized by SEM and EDS was used to determine the coating composition. Spectrophotometer has been used to measure the optical properties of the coatings. The results demonstrated that SiO2 coatings deposited by both acid and base catalysis sol-gel dip coating technique were homogeneous and well-adherent. Acid catalyzed SiO2 coatings resulted with dense and smooth surface morphologies whereas base catalyzed SiO2 coatings had nanoporous structure with nanovoids ranging between 15-30 nm. According to the optical analyses, SiO2 coatings have very high transmittance values demonstrating that they are highly transparent especially in the visible light range. 

Keywords

SiO2 kaplamalar, sol-jel daldırmalı kaplama, mikroyapısal özellikler, nanoporöz yapı, optik özellikler

Asit ve Baz Kataliz Sol-Jel Daldırmalı Kaplama Tekniği ile Üretilen SiO2 Kaplamaların İncelenmesi

Abstract

Mevcut çalışma, asit ve baz kataliz şartlarının, sol-jel daldırmalı kaplama tekniği ile üretilen SiO2 kaplama özelliklerine etkilerinin incelenmesi üzerinedir. Mikroyapısal özellikler SEM ile incelenmiş ve kaplama kompozisyonunu belirlemek için EDS kullanılmıştır. Kaplamaların optik özelliklerini ölçmek için spektrofotometre kullanılmıştır. Elde edilen sonuçlar, hem asit hem de baz kataliz sol-jel daldırmalı kaplama tekniği ile üretilen SiO2 kaplamaların homojen yapıda olduğunu ve iyi yapışma özelliği gösterdiğini ortaya koymuştur. Asit kataliz ile üretilmiş SiO2 kaplamalar yoğun ve pürüzsüz yüzey morfolojilerine sahipken baz kataliz ile üretilen SiO2 kaplamalar, boyutları 15-30 nm arasında değişen nano boşluklar içeren nanoporoz yapıdadır. Optik analiz sonuçlarına göre, SiO2 kaplamalar özellikle görünür ışık aralığında oldukça şeffaf olduklarını gösteren çok yüksek ışık geçirgenlik değerlerine sahiptirler

Keywords

SiO2 coatings, sol-gel dip coating, microstructural properties, , nanoporous structure, optical properties

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