Study of the ethylene glycol size infuence on the mullite crystallization kinetics

• Grant number: 11/07468-2
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: February 01, 2012
• End date: September 30, 2015
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
• Principal Investigator: Gilmar Patrocínio Thim
• Grantee: Tiago Moreira Bastos Campos
• Host Institution: Divisão de Ciências Fundamentais (IEF). Instituto Tecnológico de Aeronáutica (ITA). Ministério da Defesa (Brasil). São José dos Campos , SP, Brazil

Abstract

Mullite is a ceramic material with great technological applications. It has been used in pieces submitted to great mechanical efforts due to its chemical, physical and mechanical properties. Its physical chemical properties are related to synthesis method. Sol-gel is method for synthetizing mullite that makes it possible to control its properties. Sol-gel process can be divided in two methods: monophasic and diphasic. The synthesis of mullite by sol-gel process will be studied in this project using a new route: using glycols as solvents. During master degree work, we observed that is possible to obtain mullite at low temperature (1000 ºC) using glycol ethylene, sodium metasilicate as source of silica. Now, the influence of linear glycols with different sizes (2 to 6 carbon atoms) and number of OH in the chain on the kinetics of mullite crystallization will be studied. The chemical bonding between organic and inorganic compounds will be studied by FTIR and RAMAN. The crystallization study will be conducted by DTA, DRX and FTIR. The kinetic parameters will be determined by thermal analysis. DRX will be used to identify the crystallographic phases and quantify the mullite crystallization by internal standard method. FTIR will be used to determine the value of x (related to alumina content). The morphology will be studied by SEM.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

DE ALMEIDA MARIBONDO GALVAO, NIERLLY KARINNI; DE VASCONCELOS, GETULIO; RIBEIRO DOS SANTOS, MARCOS VALENTIM; BASTOS CAMPOS, TIAGO MOREIRA; PESSOA, RODRIGO SAVIO; GUERINO, MARCIEL; DJOUADI, MOHAMED ABDOU; MACIEL, HOMERO SANTIAGO. Growth and Characterization of Graphene on Polycrystalline SiC Substrate Using Heating by CO2 Laser Beam. MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS, v. 19, n. 6, p. 1329-1334, NOV-DEC 2016. (11/50773-0, 11/07468-2)

DE ALMEIDA MARIBONDO GALVAO, NIERLLY KARINNI; DE VASCONCELOS, GETULIO; RIBEIRO DOS SANTOS, MARCOS VALENTIM; BASTOS CAMPOS, TIAGO MOREIRA; PESSOA, RODRIGO SAVIO; GUERINO, MARCIEL; DJOUADI, MOHAMED ABDOU; MACIEL, HOMERO SANTIAGO. Growth and Characterization of Graphene on Polycrystalline SiC Substrate Using Heating by CO2 Laser Beam. MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS, v. 19, n. 6, p. 6-pg., 2016-11-01. (11/50773-0, 11/07468-2)