Manufacture of Fine-Pored Ceramics by the Gelcasting Method

Table 5

Results of selected physical properties for samples with compositions given in Table 4.

Sample number; (firing temperature )	Apparent density; g/cm^3	Open porosity	Phase composition
A; 600	1.01	55.8	Amorphous phase, δ-Al2O3
B; 600	1.09	54.5	Amorphous phase, anatase, δ-Al2O3, traces of rutile?
C; 600	1.06	54.7	Amorphous phase, anatase, δ-Al2O3, traces of rutile?
D; 600	1.04	56.2	Amorphous phase, δ-Al2O3
A; 1000	1.28	45.6	Amorphous phase, δ-Al2O3
B; 1000	1.4	44.2	Amorphous phase, anatase, rutile, δ-Al2O3
C; 1000	1.40	42.9	Amorphous phase, anatase, rutile, δ-Al2O3
D; 1000	1.20	52.4	Amorphous phase, δ-Al2O3
A; 1400	2.38	2.3	Cristobalite, mullite, quartz, tridymite
B; 1400	2.52	1.9	Cristobalite, mullite, rutile, tridymite
C; 1400	2.45	1.6	Cristobalite, mullite, rutile, tridymite
D; 1400	2.48	1.9	Cristobalite, mullite, quartz, tridymite