Kiln Furniture Selection Criteria

Parameter	Units	Fused Silica	Clay Bonded Fused Silica	Cordierite Thermal Shock Resistant	Cordierite Sag Resistant	Cordierite High Strength
Compositional Designation	-	CerCoSil	C703, C708	C080, C154, C455, C451, L138, L140, L183, L127, L155, C851, C864	C080, C154, C451, L140, L155, C851	C080, C851, C154, L116, L150
Bulk Density	g/cc lbs./ft³	1.89 118	1.78-1.83 111-114	1.9-2.15 119-134	1.97-2.15 123-134	1.99-2.15 124-134
Water Absorption	%	9.2	13.5-16.5	8.4-13.7	8.40-13.00	8.40-13.00
Open Porosity	%	15.6	25-31	18.5-26.1	18.50-24.25	18.50-22.10
Specific Gravity	g/cc lbs./ft³	2.24 140	2.36-2.61 147-163	2.47-2.80 154-175	2.47-2.80 154-175	2.55-2.80 159-175
Flexural Strength	MPa psi	13.8 2000	7.90-8.30 1150-1200	5.17-15.86 750-2300	9.31-16.03 1350-2325	15.51-25.51 22.50-3700
Thermal Expansion	ppm/C ppm/F	1.3 0.7	1.55-2.5 0.86-1.39	1.68-3.25 0.93-1.81	2.05-3.25 1.14-1.81	3.02-3.85 1.68-2.14
Max. Use Temp.	C	1650 3000	1450 2650	1300 2375	1300 2375	1300 2375

Parameter	Units	Alumina 80	Alumina 90	Alumina Zirconia Toughened	Zirconia	Silicon Carbide Oxide Bonded	Silicon Carbide Recrystallized
Compositional Designations	-	A203	A101, AL142	A205, AL145	IQ-396-Z	K1328, K1346	RX21
Bulk Density	g/cc lbs./ft³	2.9 181	2.88-2.98 180-186	2.72-2.96 170-185	5 312	2.45-2.66 153-166	2.65 165
Water Absorption	%	5.8	3.75-5.00	7.80-8.25	2.2	1.40-7.00	3.1
Open Porosity	%	16.7	11.20-14.00	21.30-24.00	11	16.00-22.00	18
Specific Gravity	g/cc lbs./ft³	3.5 218	3.36-3.38 210-211	3.46-3.91 216-244	5.7 356	2.70-3.05 68-190	3.22 201
Flexural Strength	MPa psi	15.45 2240	12.90-20.41 1870-2960	12.41-18.96 1800-2750	55.2 8000	18.96-24.13 2750-3500	110.3 16000
Thermal Expansion	ppm/C ppm/F	6.23 3.46	5.96-6.10 3.31-3.39	6.00-7.00 3.33-3.89	6.05 3.36	4.66-4.88 2.59-2.71	4.5 2.5
Max. Use Temp.	C F	1550 2825	1650 3000	1650 3000	1650 3000	1200 2200	1650 3000