Calcium aluminate cement aqueous suspensions as binders for Al2O3-based particle stabilised foams

Autor(es)

Santos Jr, T. ; Machado, V. V. S. ^[1] ; Borges, O. H. ^[1] ; Salvini, V. R. ^[2] ; Parr, C. ^[3] ; Pandolfelli, V. C. ^[1]

Afiliação do(s) autor(es)

^[1] Santos Jr, Jr., T., Fed Univ Sao Carlos UFSCar, Mat Engn Dept, FIRE Associate Lab, Grad Program Mat Sci & Engn PPGCEM, Mat Microstruc, Rodovia Washington Luis, Km 235, BR-13565905 Sao Carlos, SP - Brazil

^[2] Coll Technol FATEC, Jordao Borghetti St 480, BR-14160050 Sertaozinho, SP - Brazil

^[3] FIRE Associate Co, Imerys, Imerys Technol Ctr ITC Lyon, Le Chatelier St 1, ZAC Parc Technol, F-38090 Vaulx Milieu - France

• Tipo de documento: Artigo Científico
• Fonte: CERAMICS INTERNATIONAL; v. 47, n. 6, p. 8398-8407, MAR 15 2021.
• Citações Web of Science: 0

Resumo

Macroporous refractory ceramics were prepared with Al2O3-based particle stabilised foams in which ceramic particles were partially hydrophobized with propionic acid or L-leucine. Calcium aluminate cement (CAC) as dry powder or stable aqueous suspension were added as binders. Cement addition resulted in solid foams whereby setting took place in less than 24 h. Highly porous samples were attained with leucine-based foams whereas the propionic-acid ones were not stable after CAC addition. For leucine-based foams, fired samples with homogeneous microstructures, both high porosity (similar to 80%) and cold crushing strength (similar to 30 MPa) were attained when CAC aqueous suspension was used instead of CAC dry powder. These results were associated to the better dispersion of cement particles in the foam structure when CAC liquid binder was used and pointed out the advantages of this suspension for producing solid macroporous ceramics based on particle-stabilised foams. (AU)

• Processo FAPESP: 18/07745-5 - Controle dimensional de cerâmicas macroporosas por meio da formação de CA6 in situ
• Beneficiário: Otávio Henrique Borges
• Modalidade de apoio: Bolsas no Brasil - Mestrado