Poster (EARTH)

[PE1-014] Characteristics of Porous Ceramics from Recycling of Sandblasting Waste and Waste Diatomite by Sintering Process

○Kae-Long Lin¹, Chih-Husan Ho², Ju-Ying Lan¹ (1. Department of Environmental Engineering, National of ILan University,, 2. Department of Civil Engineering and Environmental Resources Management, Dahan Institute of Technology,)

Keywords:Waste Diatomite , sandblasting waste, porous ceramics, sintering

The purpose of this research is to recycling sandblasting waste from the surface treatment process of solar cell industry to replace waste diatomite (with a replacement ratio of 0%-20%) to make water-retention porous ceramics, and adopts the method of molding by semi-dry pressing under a pressure of 50 kgf/cm², as the heating temperature fluctuated between 1000, 1100, 1200, and 1270^oC. With a heating rate of 5^oC/min, the heating process continued for 120 minutes. The sintered samples were then examined to determine whether its mechanical properties were met the CNS 382 R2002 Brick Criteria in terms of compressive strength (>3 MPa); while FTIR, and MIP instruments were used to measure the changes in the sintering samples according to pore size and total pore volume. The results indicated that the waste diatomite and sand blasting waste consisted of quartz, and porosities of porous ceramics with sandblasting waste higher than 58.55- 65.83%, water absorption of about 72.2- 97.4%, and compressive strength of about 2.4- 7.3 MPa can be produced using a porous ceramics of raw materials. FTIR analysis found that the wavenumber was between 900 and 1200 cm^-1, the silicon tetrahedrons were comprised mainly of phyllosilicate, and the (Si-O-Si) surface bonds featured asymmetric stretching. Moreover, the thermal conductivity of cement paste was 0.57 W/m.K, which was significantly higher than 0.28- 0.49 W/m.K of porous ceramics with sandblasting waste, the porous ceramics have good heat insulation effects.