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>Kyocera</strong>'s <strong>Ceramic</strong> <strong>Heaters</strong> are characterized by<br />
their compact design, ability to generate heat<br />
rapidly, and high reliability under harsh<br />
environments.<br />
Alumina <strong>Heaters</strong><br />
<strong>The</strong> Alumina Heater is produced by implementing unique metallizing and<br />
ceramic laminating processes. Due to the advanced manufacturing<br />
techniques in the electric element, the Alumina Heater can provide higher<br />
reliability than ever before. It is being used, as an innovative type <strong>of</strong> heater,<br />
in such industries as Automotive, Medical, and Semiconductor.<br />
Silicon Nitride <strong>Heaters</strong> (SN <strong>Heaters</strong>)<br />
Silicon Nitride material has high temperature strength, and outstanding<br />
thermal shock resistance. <strong>Kyocera</strong> was the first company in the world to<br />
commercialize and mass produce the ceramic glow plug, made <strong>of</strong> Silicon<br />
Nitride, for the diesel engine. Due to its outstanding performance, the<br />
Silicon Nitride heater is effectively used in a wide range <strong>of</strong> industrial fields.
Alumina <strong>Heaters</strong><br />
Silicon Nitride <strong>Heaters</strong> (SN <strong>Heaters</strong>)
<strong>The</strong> <strong>Advantages</strong> <strong>of</strong> <strong>Ceramic</strong> <strong>Heaters</strong><br />
<strong>Kyocera</strong>’s ceramic heaters have unparalleled advantages over conventional heaters.<br />
Compact and Light Weight<br />
● High watt density<br />
● Multiple heating elements per unit available<br />
Superior <strong>The</strong>rmal Properties<br />
● Rapid Heat Increase<br />
● Custom designed temperature distribution<br />
available<br />
● High levels <strong>of</strong> insulation allow direct contact<br />
with metal and water<br />
● SN Heater: Heat increase to 1000˚C in one<br />
second with controller<br />
High Reliability<br />
● Superior dielectric strength and volume<br />
resistivity<br />
● Longer life due to oxidation-pro<strong>of</strong> design on<br />
resistive material<br />
● Superior chemical resistance<br />
Environmental Qualities<br />
● No electric noise<br />
● Energy-saving due to the superior thermal<br />
efficiency<br />
<strong>The</strong>rmal distribution <strong>of</strong> Alumina Heater<br />
<strong>The</strong>rmal distribution <strong>of</strong> SN Heater
Design Structure<br />
<strong>Ceramic</strong> heaters are manufactured by printing resistors on alumina sheets or silicon nitride plates, being<br />
laminated and sintered into one piece.<br />
●Plate Type<br />
●Rod Type<br />
●Tube Type<br />
Lead wire<br />
Lead wire<br />
Lead wire<br />
Configuration and Dimensions<br />
Alumina Heater<br />
SN Heater<br />
Configuration<br />
Tube/Rod<br />
Plate<br />
or<br />
Square/Round<br />
Plate<br />
Configuration<br />
Plate Type<br />
Rod Type<br />
Tube Type<br />
Dimension (mm) Tolerance (mm) Camber (mm)<br />
Length<br />
r120max<br />
r200max<br />
Diameter<br />
ø2min~ø50max<br />
ø3min~ø20max<br />
Length r50min.±1%<br />
r50max.±0.5<br />
Diameter ø10min.±2%<br />
ø10max.±0.2<br />
Side or Diameter Thickness<br />
Side or Diameter 20min.±1%<br />
160 × 160<br />
0.3min<br />
20max.±0.2<br />
or<br />
Thickness 1min.±10%<br />
ø160<br />
5.4max<br />
1max.0.1<br />
~<br />
Length ( r) Width (w) Thickness (t)<br />
30~100 4~50 1~20<br />
t<br />
w<br />
r<br />
ød<br />
Length ± 3%<br />
Width ± 3%<br />
Thickness ±10%<br />
r<br />
0.4/100<br />
0.4/100<br />
0.4/100<br />
Note: Will comply to other requirements besides the above described, whenever required.
<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
Electrical Properties<br />
1.<strong>The</strong>rmal Coefficient <strong>of</strong> Resistivity<br />
●Alumina Heater<br />
Resistance Ratio vs.<br />
Temperature<br />
●SN Heater<br />
Resistance Ratio vs.<br />
Temperature<br />
2.Dielectric Strength<br />
Resistance Ratio (Rt/R23)<br />
Resistance Ratio (Rt/R25)<br />
Volume Resistivity (MΩ)<br />
6<br />
4<br />
2<br />
Alumina Heater: Paste A 4.44 × 10 -3<br />
T.C.R.<br />
(23~800˚C)<br />
Paste B 2.96 × 10 -3 (23~800˚ C)<br />
Ni-Cr Heater 110 × 10 -6 T.C.R.<br />
(20˚C)<br />
0<br />
23 200 400 600 800 1000 (˚C)<br />
5<br />
4<br />
3<br />
2<br />
1<br />
1000<br />
0<br />
25<br />
100<br />
10<br />
0<br />
0<br />
200<br />
200<br />
400<br />
Temperature (˚C)<br />
Paste AL : T.C.R. 3.5 × 10 -3<br />
600<br />
400<br />
800<br />
Temperature (˚C)<br />
Mica Heater<br />
Alumina Heater<br />
Paste AH : T.C.R. 1.4 × 10 -3<br />
600<br />
1000<br />
Surface Temperature (˚C)<br />
1200<br />
800<br />
1400<br />
Configuration 13ø–8ø × 53r<br />
Heating Area 2,123mm2 Metal Heater<br />
(˚C)
Automotive Related Heater Applications<br />
Applications<br />
Glow Plug<br />
Intake (Burner) Heater<br />
Others<br />
Water-Heating Applications<br />
Hot Water Heater<br />
Liquid Heater for Small Appliances<br />
Heater for Toilet Water
Other Industrial Heater Applications<br />
Applications<br />
Soldering Iron<br />
Curling Iron<br />
Steam Boiler Heater<br />
Air Heater<br />
IR Source & Igniter<br />
Vaporizer
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