Features Specifications:Sell Ceramic saddle  Ceramic saddle rings are mostly used as heat transfer media and are of much higher density and require good high temperature...... Chemical composition of ceramic saddle  SiO2 Al2O3 Fe2O3 CaO K2O+Na2O 70% 23-30% Physical properties of Ceramic saddle  Index Value Specific gravity(g/cm3) 2.25-2.35 Water absorption(%) Acid-resisting strength, %Wt. Loss (ASTMc279) Firing temperature() 1280-1320 Softening point() 1400 Density(kg/m3) 2350 Technical data of Ceramic saddle Spec. (inch) Spec. (mm) Approx. weight (kg/m3) Surface area (m²/m³) Free volume (%) Packing factor (l/ft) 1/2 12 720 623 71.7 200 3/4 19 688 334 73 130 1 25 688 253 73 85 1.5 38 640 164 75 50 2 50 577 115 77.4 37 3 76 623 92 75.5 24  Advantage These saddles are made from chemical porcelain and have excellent resistance to acids except in the case of hydrofluoric acid. Moisture absorption must less than half a percent. The porcelains specific gravity is 2.3-2.4g/cm3 and an average heat capacity (between 20 and 500 of 0.22 cal/g.) JINYU ceramic saddles for RTOs softening point is 1400 min. And they show good thermal shock resistance during repeated cycling between 20 and 820 .