@Article{jrm.2023.025732,
AUTHOR = {Liang Yu, Yuan Liu, Xiuling Cao, Yulong Yan, Chen Zhang, Yanli Jiang},
TITLE = {Research of Microstructure, Phase, and Mechanical Properties of Aluminum-Dross-Based Porous Ceramics},
JOURNAL = {Journal of Renewable Materials},
VOLUME = {11},
YEAR = {2023},
NUMBER = {7},
PAGES = {3057--3072},
URL = {http://www.techscience.com/jrm/v11n7/52958},
ISSN = {2164-6341},
ABSTRACT = {In this study, the effect of sintering temperature and the addition of kaolin, a sintering agent, on the microscopic, phase, and mechanical properties of ceramics were investigated using secondary aluminum dross (SAD) as the main component in the manufacturing of ceramics. The basic phases of the ceramics were Al<sub>2</sub>O<sub>3</sub>, MgAl<sub>2</sub>O<sub>4</sub>, NaAl<sub>11</sub>O<sub>17</sub>, and SiO<sub>2</sub> without the addition of kaolin. The diffraction peaks of MgAl<sub>2</sub>O<sub>4</sub>, NaAl<sub>11</sub>O<sub>17</sub>, and SiO<sub>2</sub> kept decreasing while those of Al<sub>2</sub>O<sub>3</sub> kept increasing with an increase in temperature. In addition, the increase in temperature promoted the growth of the grains. The grains were uniform in size and regular in distribution, with a shrinkage of 2.2%, porosity of 72.5%, bulk density of 1.076 g/cm<sup>3</sup>, and compressive strength of 1.12 MPa. When the sintering temperature was 1450°C, the basic phases of the ceramic after the addition of kaolin were Al<sub>2</sub>O<sub>3</sub>, MgAl<sub>2</sub>O<sub>4</sub>, NaAl<sub>11</sub>O<sub>17</sub>, and SiO<sub>2</sub>. With the increase of kaolin, the diffraction peaks of NaAl<sub>11</sub>O<sub>17</sub> and SiO<sub>2</sub> decreased until they disappeared, while the diffraction peaks of Al<sub>2</sub>O<sub>3</sub> increased significantly. When kaolin was added at 30 wt.%, the ceramics obtained had shrinkage of 18%, a porosity of 47.26%, a bulk density of 1.965 g/cm<sup>3</sup>, and compressive strength of 31.9 MPa. Cracks existed inside the ceramics without the addition of kaolin, while the addition of kaolin significantly changed this defect. It is shown that SAD can obtain porous ceramics with good properties at a sintering temperature of 1450°C and a kaolin addition of 30 wt.%.},
DOI = {10.32604/jrm.2023.025732}
}