Influence of different solvents in the synthesis of mullite by sol-gel

Materia

article

Aluska do Nascimento Simões Braga¹  Geysivana Kessya Garcia Carvalho¹  Hélio de Lucena Lira²  Gelmires de Araújo Neves²  Romualdo Rodrigues Menezes² 

[1]UFPI

[2]UFCG

关键词: Synthesis;    Sol-gel;    Mullite;    Solvents;   

DOI  :  10.1590/S1517-707620210002.1283

学科分类：工程和技术（综合）

来源: Universidade Federal do Rio de Janeiro * Coordenacao dos Programas de Pos-Graduacao de Engenharia

【 摘 要 】

Mullite is a material that has received special attention due to its chemical, physical and mechanical properties, which are correlated with the synthesis method used. The sol-gel method stands out compared to other chemical methods due to the possibility of obtaining materials with a high degree of purity and low synthesis temperatures. Thus, this work aimed to analyze the solvents water, ethyl alcohol, isopropyl alcohol and tetrahydrofuran, in obtaining mullite using the sol-gel route. The samples were characterized by X-ray diffraction (XRD), thermogravimetric and differential analysis (TG/DTA), nitrogen adsorption (BET), scanning electron microscopy (SEM) and transmission electron microscopy (MET). The results showed that mullite was synthesized with all solvents, however, the use of alcohols as a solvent provided the obtaining of the most crystalline samples, with the lowest mass losses, with a morphology formed by aggregates and individualized particles.

【 授权许可】

CC BY