Coal Fly Ash Ceramics: Preparation, Characterization, and Use in the Hydrolysis of Sucrose oleh Ricardo Pires dos Santos, Jorge Martins, Carlos Gadelha, Benildo Cavada, Alessandro Victor Albertini, Francisco Arruda, Mayron Vasconcelos, Edson Teixeira, Francisca Alves, José Lima Filho, Valder Freire