The Advantages of Ceramic Heaters - Kyocera Americas
The Advantages of Ceramic Heaters - Kyocera Americas
The Advantages of Ceramic Heaters - Kyocera Americas
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<strong>The</strong>rmal Properties<br />
Item<br />
Maximum Use Temperature ˚Cmax 1,000 1,400<br />
Operating Temperature ˚Cmax 800 1,300<br />
<strong>The</strong>rmal Conductivity20˚C w/(m k) 18 25.0<br />
Specific Heat J/(kg ⋅ k) 0.75 × 10 3 0.64 × 103 Coef. <strong>of</strong> Linear <strong>The</strong>rmal Expansion /˚C (40~800˚C ) 7.8 × 10-6 3.4 × 10-6 Alumina Heater<br />
SN Heater<br />
(A-473)<br />
(SN-361)<br />
Mechanical Properties<br />
■Properties<br />
Alumina Heater<br />
SN Heater<br />
SN Heater<br />
Item<br />
(A-473)<br />
(SN-220)<br />
(SN-361)<br />
Vickers Hardness (Load 500g) GPa 13.7 14.7 17.1<br />
Flexural Strength MPa 310 590 740<br />
■High Temperature Strength ■<strong>The</strong>rmal Shock Durability<br />
Flexural Strength (MPa)<br />
Chemical Durability<br />
Weight Loss (mg/cm 2<br />
)<br />
6 Sulfuric Acid 95% H2SO4<br />
5<br />
3<br />
2<br />
1<br />
0<br />
800<br />
600<br />
400<br />
200<br />
0<br />
Silicon Nitride (SN-361)<br />
Silicon Nitride (SN-220)<br />
Alumina (A-473)<br />
200 400 600 800 1000 1200 1400<br />
Alumina<br />
Silicon Nitride<br />
Ni-Mo Alloy<br />
Stainless Steel<br />
Cr Steel<br />
6 Nitric Acid 60% HNO3<br />
5<br />
3<br />
1<br />
0<br />
Alumina<br />
Silicon Nitride<br />
Ni-Mo Alloy<br />
Flexural Strength<br />
After Quick Cooling (MPa)<br />
Stainless Steel<br />
800<br />
600<br />
400<br />
200<br />
Cr Steel<br />
Silicon Nitride (SN-361)<br />
Silicon Nitride (SN-220)<br />
Alumina (A-473)<br />
(˚C)<br />
0 200 400 600 800 (˚C)<br />
6 Sodium Hydroxide 30% NaOH<br />
5<br />
3<br />
2<br />
1<br />
0<br />
Alumina<br />
Silicon Nitride<br />
Ni-Mo Alloy<br />
Stainless Steel<br />
Cr Steel
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