• Saponjic, Aleksandra
• Vuković, Marina
• Kokunesoski, Maja
• Majstorović, Jelena
• Ilic, Svetlana
• Saponjic, Djordje

Abstract

<jats:p>Macroporous silica ceramic was obtained using clay and diatomite. Boric acidas a low-cost additive in the amount of 1 wt% was used. These porousmaterials were obtained at low forming pressure (40-80 MPa) and lowersintering temperature (850-1300 ?C) for 4h in air. The influence of boricacid, forming pressure, and sintering temperature on the microstructure,porosity parameters, and mechanical properties of obtained porous monolithswere investigated. As-received and the modified samples were characterizedby X-ray diffraction, FTIR, SEM, and mercury porosimetry measurements. Asfor modified clay and diatomite, they were pressed at 60 MPa and thensintered at 1150 ?C, obtaining porosities of about 10 % and 60 %,respectively. Both of the analyzed samples had the pore diameter in therange of macroporous materials. The pore diameters of clay samples areranging from 0.1-10 ?m, whereas the pore diameter of diatomite samples wasslightly lower with values ranging from 0.05-5 ?m. Modified diatomitesamples have a lower Young modulus in comparison to modified clay samples.</jats:p>

Topics

• porous
• pore
• mineral
• scanning electron microscopy
• x-ray diffraction
• forming
• porosity
• ceramic
• sintering
• porosimetry
• Mercury