The Effect of Commercial Rice Husk Ash Additives on the Porosity, Mechanical Properties, and Microstructure of Alumina Ceramics

Table 2

Different ratios of rice husk ash with alumina used to fabricate porous ceramics, porosity characterization, and density.

Rice husk ash content (wt%)	Al2O3 ratio (wt%)	Overall porosity (vol%)	Open porosity (vol%)	Green density (g/cm^3)	Sintered bulk density (g/cm^3)	Relative density (%)
0	100	18.45	10.76	1.92	2.99	75.89
10	90	42.97	24.29	1.86	2.25	57.11
20	80	48.09	27.38	1.76	2.04	51.78
30	70	47.63	23.94	1.67	2.06	52.28
40	60	49.44	24.00	1.58	1.99	50.51
50	50	49.04	20.15	1.53	2.01	51.02