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

Table 3

Mechanical properties of porous ceramics.

Rice husk ash content (wt%)	Porosity (vol%)	Hardness (HV1)	Compressive strength (MPa)	Tensile strength (MPa)
0	18.45	372.83 ± 7.50	218.66 ± 2.52	27.39 ± 0.92
10	42.97	110.00 ± 2.11	59.81 ± 2.27	20.17 ± 1.19
20	48.09	101.90 ± 2.99	59.33 ± 3.96	18.99 ± 1.26
30	47.64	150.92 ± 1.88	69.72 ± 2.87	24.12 ± 0.93
40	49.45	114.92 ± 3.97	53.87 ± 1.55	21.88 ± 1.03
50	49.04	158.93 ± 3.96	60.14 ± 2.01	21.98 ± 0.84