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  4. Formation of mullite thin film via a sol-gel process with polyvinylpyrrolidone additive
 
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Formation of mullite thin film via a sol-gel process with polyvinylpyrrolidone additive

Resource
Journal of the European Ceramic Society 21 (14): 2535-2540
Journal
Journal of the European Ceramic Society
Journal Volume
21
Journal Issue
14
Pages
2535-2540
Date Issued
2001
Date
2001
Author(s)
Chen, Yen-Yu
Wei, Wen-Cheng J.  
URI
http://ntur.lib.ntu.edu.tw//handle/246246/95358
https://www.scopus.com/inward/record.uri?eid=2-s2.0-0034834059&doi=10.1016%2fS0955-2219%2801%2900277-1&partnerID=40&md5=584aea2a7ff3cc2ab29da18415cf7710
Abstract
Several tasks were tried to prepare crack-free mullite films on silica substrates. Basically, a sol containing TEOS (Tetraethylorthosilicate) and boehmite colloid was used for spin coating on silica substrate. The formulation of the sols was kept in stoichiometric composition 3Al 2O 3·2SiO 2, or contained a crack-limiting agent, Polyvinylpyrrolidone (PVP). These films were then treated up to 1300°C. The properties of the sols and the dried films were characterized by rheometer, various thermal analysis techniques (DTA, TGA and TMA), also by XRD, SEM and TEM. The mullite film shows randomly oriented grains in sizes from 0.1 μm to a few micrometers. The films still contain fine θ- and δ-Al 2O 3 particles after being treated at 1280°C for 1 h. © 2001 Elsevier Science Ltd. All rights reserved.
Subjects
Mullite; PVP; Sol-gel processes; Spin coating; Thin films
Other Subjects
Spin coatings; Coatings; Grain size and shape; Rheometers; Scanning electron microscopy; Silica; Sol-gels; Stoichiometry; Transmission electron microscopy; X ray diffraction analysis; Thin films; additive; ceramics; film; mullite
Type
journal article
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