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Ferrite Magnets, commonly called Ceramics, are the most widely used magnet materials in the world. Primarily made of Strontium (Sr) and Iron Oxide (Fe2O3), they are the least expensive permanent magnets today. Mostly used in Electric Motors and Loudspeakers.
| Alliance Ferrite Grades | Remanent Induction | Coercive Force | Intrinsic Coercive Force | Maximum Energy Product | Reversible Temperature Coefficients | Continuous Working Temp. | ||||||
| Br (Gauss) | Hc (Oe) | Hci (Oe) | (BH)max (MGOe) | α Br | ß Hci | Tw (°C) | ||||||
| Min | Max | Min | Max | Min | Max | Min | Max | %/°C | %/°C | Max | ||
| C0 | 2,100 | 2,300 | 1,600 | 2,000 | 2,650 | 2,950 | 0.7 | 1.1 | -0.20 | 0.35 | 350 | |
| C1 | 2,250 | 2,450 | 1,750 | 2,050 | 3,100 | 3,400 | 0.9 | 2.0 | -0.20 | 0.35 | 350 | |
| C4 | 3,200 | 3,400 | 1,700 | 2,100 | 1,750 | 2,150 | 2.3 | 2.7 | -0.20 | 0.35 | 350 | |
| C4B | 3,800 | 4,000 | 1,800 | 2,200 | 1,850 | 2,250 | 3.0 | 3.4 | -0.20 | 0.35 | 350 | |
| C5 | 3,800 | 4,050 | 2,200 | 2,600 | 2,250 | 2,650 | 3.2 | 3.6 | -0.20 | 0.35 | 350 | |
| C7 | 3,700 | 3,900 | 3,300 | 3,650 | 3,850 | 4,150 | 3.6 | 3.8 | -0.20 | 0.35 | 350 | |
| C8 | 3,900 | 4,100 | 3,000 | 3,400 | 3,050 | 3,450 | 3.4 | 3.8 | -0.20 | 0.35 | 350 | |
| C8H | 3,700 | 3,900 | 3,500 | 3,800 | 4,800 | 5,100 | 3.2 | 3.6 | -0.20 | 0.35 | 350 | |
| C8B | 3,950 | 4,150 | 3,300 | 3,650 | 3,500 | 3,800 | 3.6 | 4.0 | -0.20 | 0.35 | 350 | |
| C9H | 3,900 | 4,100 | 3,670 | 3,970 | 4,350 | 4,650 | 4.0 | 4.4 | -0.20 | 0.35 | 350 | |
| C9B | 4,300 | 4,500 | 3,100 | 3,400 | 3,150 | 3,450 | 4.4 | 4.8 | -0.20 | 0.35 | 350 | |
| C10 | 4,000 | 4,200 | 2,700 | 3,000 | 2,750 | 3,050 | 3.7 | 4.1 | -0.20 | 0.35 | 350 | |
| C10H | 4,100 | 4,300 | 3,550 | 3,850 | 3,850 | 4,150 | 4.0 | 4.4 | -0.20 | 0.35 | 350 | |
| C11 | 4,200 | 4,400 | 4,020 | 4,320 | 4,850 | 5,150 | 4.2 | 4.6 | -0.20 | 0.35 | 350 | |
| C12 | 4,500 | 4,700 | 3,200 | 3,500 | 3,450 | 3,750 | 4.8 | 5.2 | -0.20 | 0.35 | 350 | |
| Alliance Ferrite Grades | Density | Tensile Strength | Modulus of Elasticity | Thermal Expansion Coefficient /°C | Electrical Resistivity | Curie Temperature | ||||||
| g/cm3 | lbs/in3 | psi | Pa x 106 | psi x 106 | Pa x 106 | ǁ to M | Ʇ to M | Ω-cm @ 20 C | °C | |||
| C0 | 4.90 | 0.177 | 5,000 | 34 | 26 | 180,000 | 14x10-6 | 10x10-6 | 100,000 | 450 | ||
| C1 | 4.90 | 0.177 | 5,000 | 34 | 26 | 180,000 | 14x10-6 | 10x10-6 | 100,000 | 450 | ||
| C4 | 4.90 | 0.177 | 5,000 | 34 | 26 | 180,000 | 14x10-6 | 10x10-6 | 100,000 | 450 | ||
| C4B | 4.90 | 0.177 | 5,000 | 34 | 26 | 180,000 | 14x10-6 | 10x10-6 | 100,000 | 450 | ||
| C5 | 4.90 | 0.177 | 5,000 | 34 | 26 | 180,000 | 14x10-6 | 10x10-6 | 100,000 | 450 | ||
| C7 | 4.90 | 0.177 | 5,000 | 34 | 26 | 180,000 | 14x10-6 | 10x10-6 | 100,000 | 450 | ||
| C8 | 4.90 | 0.177 | 5,000 | 34 | 26 | 180,000 | 14x10-6 | 10x10-6 | 100,000 | 450 | ||
| C8H | 4.90 | 0.177 | 5,000 | 34 | 26 | 180,000 | 14x10-6 | 10x10-6 | 100,000 | 450 | ||
| C8B | 4.90 | 0.177 | 5,000 | 34 | 26 | 180,000 | 14x10-6 | 10x10-6 | 100,000 | 450 | ||
| C9H | 4.90 | 0.177 | 5,000 | 34 | 26 | 180,000 | 14x10-6 | 10x10-6 | 100,000 | 450 | ||
| C9B | 4.90 | 0.177 | 5,000 | 34 | 26 | 180,000 | 14x10-6 | 10x10-6 | 100,000 | 450 | ||
| C10 | 4.90 | 0.177 | 5,000 | 34 | 26 | 180,000 | 14x10-6 | 10x10-6 | 100,000 | 450 | ||
| C10H | 4.90 | 0.177 | 5,000 | 34 | 26 | 180,000 | 14x10-6 | 10x10-6 | 100,000 | 450 | ||
| C11 | 4.90 | 0.177 | 5,000 | 34 | 26 | 180,000 | 14x10-6 | 10x10-6 | 100,000 | 450 | ||
| C12 | 4.90 | 0.177 | 5,000 | 34 | 26 | 180,000 | 14x10-6 | 10x10-6 | 100,000 | 450 | ||
