Heat Sinks
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Long Term Testing on Keratherm Materials 0-Probe : this is the material right after production 100 h TWB: 100 h cycle test (one cycle from –40 to +95 °C in 1 hour) 100 h 95%, 95°C: 100 hours at 95% humidity and 95°C 100 h at 150 °C: self explaining 500 h at 150 °C: self explaining 1000 h at 150 °C: self explaining
Thermal aging on Keratherm 86/17 (0,225 mm) 9 8 0,6 7 0,5 6 0,4 5 4 Rth [K/W] 0,3 3 0,2 2 Ud [kV] 0,1 1 0 0 0-Probe 100h TWB 100h 95% 100h 150° 500h 150° 1000h 95° 150°
Dielectric Breakdown Ud [kV]
Thermal Resistance Rth [K/W]
0,7
Test method
0,36 0,34 0,32 0,3 0,28 0,26 0,24 0,22 0,2 0-Probe
Rth [K/W] Ud [kV]
100h TWB
100h 95% 100h 150° 500h 150° 95° Test method
1,8 1,6 1,4 1,2 1 0,8 0,6 0,4 0,2 0 1000h 150°
Dielectric Breakdown Ud [kV]
Thermal Resistance Rth [K/W]
Thermal aging on Keratherm 86/30 (0,225 mm)
0,55
10
0,54
9
0,53
8
0,52
7
0,51
6
0,5
5
0,49
Rth [K/W]
0,48
3 Ud [kV]
0,47 0,46 0,45 0-Probe
4 2 1
100h TWB
100h 95% 95°
100h 150°
Dielectric Breakdown Ud [kV]
Thermal Resistance Rth [K/W]
Thermal aging on Keratherm 86/37 (0,225 mm)
0 500h 150° 1000h 150°
Test method
Thermal aging Keratherm 86/50 (0,225 mm) 2
0,18
1,8
0,16
1,6
0,14
1,4
0,12
1,2
0,1
Rth [K/W]
0,08 0,06
Ud [kV]
1 0,8 0,6
0,04
0,4
0,02
0,2
0 0-Probe
100h TWB
100h 95% 95°
100h 150°
Test method
500h 150°
0 1000h 150°
Dielectric Breakdown Ud [kV]
Thermal Resistance Rth [K/W]
0,2
0,98
7
0,96
6 5
0,94
4 0,92 3 0,9
Rth [K/W]
2
0,88
1
Ud [kV] 0,86 0-Probe
100h TWB
100h 95% 95°
100h 150°
500h 150°
Dielectric Breakdown Ud [kV]
Thermal Resistance Rth [K/W]
Thermal aging Keratherm 86/77 (0,3 mm)
0 1000h 150°
Test method
Thermal aging on Keratherm 86/200 12
2,25 10 2,2 2,15
8
2,1 6 2,05
Rth [K/W]
2
4
1,95
Ud [kV]
1,9 1,85 0-Probe
100h TWB
100h 95% 95°
100h 150°
Test method
500h 150°
2
Dielectric Breakdown Ud [kV]
Thermal Resistance Rth [K/W]
2,3
0 1000h 150°
1,5 1,45 1,4 1,35 1,3 1,25 500 h - 85/85
100 h - 85/85
500 h - TWB
1000 h - 150°C
500 h - 150°C
250 h - 150°C
100 h - 150°C
1,2 Ausgangsprobe
Thermal Conductivity [W/mK]
Aging Test Softtherm 86/255 [0,5 mm]
Thermal aging on Keratherm Graphite 0,160
Thermal Resistance [K/W]
0,140 0,120 0,100
90/20 90/10
0,080
90/10-S 90/15
0,060 0,040 0,020 0,000 0-Probe
100 h / 120 °
500 h / 120 ° Test Method
1000 h / 120 °
150 h - 95/95-Test
Long Term Life Test for Softtherm 86/200 Specimen was stored for about 8 – 10 years and tested for thermal and electrical performance
Longterm Life Test Softtherm 86/200 (20-22°C, 45-55 % humidity)
Thermal Resistance [K/W]
2,5
2,25
Softtherm 86/200 2
1,75 1
100
1000
5000
10000
Test tim e in hours
Longterm Life Test Softtherm 86/200 (20-22 °C, 45-55 % humidity) 9
Dieelectric Breakdown [kV]
8 7 6 5 Softtherm 86/200 4 3 2 1 0 1
100
1000 Testtim e in hours
5000
10000
Thermal aging on Keratherm 86/17 (0,225 mm) 9 8 0,6 7 0,5 6 0,4 5 4 Rth [K/W] 0,3 3 0,2 2 Ud [kV] 0,1 1 0 0 0-Probe 100h TWB 100h 95% 100h 150° 500h 150° 1000h 95° 150°
Dielectric Breakdown Ud [kV]
Thermal Resistance Rth [K/W]
0,7
Test method
0,36 0,34 0,32 0,3 0,28 0,26 0,24 0,22 0,2 0-Probe
Rth [K/W] Ud [kV]
100h TWB
100h 95% 100h 150° 500h 150° 95° Test method
1,8 1,6 1,4 1,2 1 0,8 0,6 0,4 0,2 0 1000h 150°
Dielectric Breakdown Ud [kV]
Thermal Resistance Rth [K/W]
Thermal aging on Keratherm 86/30 (0,225 mm)
0,55
10
0,54
9
0,53
8
0,52
7
0,51
6
0,5
5
0,49
Rth [K/W]
0,48
3 Ud [kV]
0,47 0,46 0,45 0-Probe
4 2 1
100h TWB
100h 95% 95°
100h 150°
Dielectric Breakdown Ud [kV]
Thermal Resistance Rth [K/W]
Thermal aging on Keratherm 86/37 (0,225 mm)
0 500h 150° 1000h 150°
Test method
Thermal aging Keratherm 86/50 (0,225 mm) 2
0,18
1,8
0,16
1,6
0,14
1,4
0,12
1,2
0,1
Rth [K/W]
0,08 0,06
Ud [kV]
1 0,8 0,6
0,04
0,4
0,02
0,2
0 0-Probe
100h TWB
100h 95% 95°
100h 150°
Test method
500h 150°
0 1000h 150°
Dielectric Breakdown Ud [kV]
Thermal Resistance Rth [K/W]
0,2
0,98
7
0,96
6 5
0,94
4 0,92 3 0,9
Rth [K/W]
2
0,88
1
Ud [kV] 0,86 0-Probe
100h TWB
100h 95% 95°
100h 150°
500h 150°
Dielectric Breakdown Ud [kV]
Thermal Resistance Rth [K/W]
Thermal aging Keratherm 86/77 (0,3 mm)
0 1000h 150°
Test method
Thermal aging on Keratherm 86/200 12
2,25 10 2,2 2,15
8
2,1 6 2,05
Rth [K/W]
2
4
1,95
Ud [kV]
1,9 1,85 0-Probe
100h TWB
100h 95% 95°
100h 150°
Test method
500h 150°
2
Dielectric Breakdown Ud [kV]
Thermal Resistance Rth [K/W]
2,3
0 1000h 150°
1,5 1,45 1,4 1,35 1,3 1,25 500 h - 85/85
100 h - 85/85
500 h - TWB
1000 h - 150°C
500 h - 150°C
250 h - 150°C
100 h - 150°C
1,2 Ausgangsprobe
Thermal Conductivity [W/mK]
Aging Test Softtherm 86/255 [0,5 mm]
Thermal aging on Keratherm Graphite 0,160
Thermal Resistance [K/W]
0,140 0,120 0,100
90/20 90/10
0,080
90/10-S 90/15
0,060 0,040 0,020 0,000 0-Probe
100 h / 120 °
500 h / 120 ° Test Method
1000 h / 120 °
150 h - 95/95-Test
Long Term Life Test for Softtherm 86/200 Specimen was stored for about 8 – 10 years and tested for thermal and electrical performance
Longterm Life Test Softtherm 86/200 (20-22°C, 45-55 % humidity)
Thermal Resistance [K/W]
2,5
2,25
Softtherm 86/200 2
1,75 1
100
1000
5000
10000
Test tim e in hours
Longterm Life Test Softtherm 86/200 (20-22 °C, 45-55 % humidity) 9
Dieelectric Breakdown [kV]
8 7 6 5 Softtherm 86/200 4 3 2 1 0 1
100
1000 Testtim e in hours
5000
10000
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