The thermoelectric materials of the of ECOGEN Company found a wide recognition among companies producing thermoelectric modules worldwide. Thermoelectric materials are supplied as ingots, disks or thermoelectric elements that have high q-factor and long term stability of the parameters.
P-N type
Definitions
α - Seebeck coefficient, unit of measure V/K * 10-6;
σ - Electric conductivity, unit of measure (Ohm*cm)-1;
æ - Heat conductivity, unit of measure W/m*K;
Thermoelectric figure of merit, Z= α2*σ/æ
We are suggesting following thermoelectric materials for our customers.
Standart specifications are related to ingots with diameter 25mm and lengths 60mm.
1. Standard cooling materials for T=300K
|
N-type Bi2(TеSe)3 |
P(1)-type (BiSb)2(TeSe)3 |
High performance P(2)-type (BiSb)2(TeSe)3 |
Seebeck coefficient, V/K * 10-6 |
205÷220 |
200÷209 |
206÷222 |
Electric conductivity, (Ohm*cm)-1 |
1070÷870 |
1150÷1000 |
1150÷1000 |
Heat conductivity, W/m*K; |
1,5÷1,4 |
1,5÷1,4 |
1,45÷1,35 |
Extremum of thermoelectric figure of merit (Z= α2*σ/æ) at, K |
300÷290 |
300÷295 |
300÷290 |
N + P(1) ΔT= 72°C (in pair).
N + P(2) ΔT≥ 74°C (in pair).
2. Low temperature cooling materials
|
N-type Bi2(TеSe)3 for T=300K |
N-type Bi2(TеSe)3 for T=250K |
P-type (BiSb)2(TeSe)3. For T=300K |
P-type (BiSb)2(TeSe)3. For T=240K |
Seebeck coefficient, V/K * 10-6 |
250÷270 |
230÷250 |
245÷265 |
215÷235 |
Electric conductivity, (Ohm*cm)-1 |
550÷400 |
750÷600 |
550÷400 |
770÷600 |
Heat conductivity, unit of measure W/m*K; |
1,2 |
1,4 |
1,1 |
1,2 |
Extremum of thermoelectric figure of merit (Z= α2*σ/æ) at, K |
260÷250 |
260÷250 |
240÷250 |
240÷250 |
3. Low temperature generating materials with Thot=200ºC
|
N-type Bi2(TеSe)3 for T=300K |
P-type (BiSb)2(TeSe)3 for T=300K |
N-type Bi2(TеSe)3 for T=300K |
P-type (BiSb)2(TeSe)3 for T=300K |
Seebeck coefficient, V/K * 10-6 |
160÷170 |
150÷160 |
142÷152 |
147÷157 |
Electric conductivity, (Ohm*cm)-1 |
1700÷1500 |
2000÷1800 |
2200÷2000 |
2300÷2100 |
Heat conductivity, W/m*K; |
Average for P&N 2,0 |
Average for P&N 2,2 |
||
Extremum of thermoelectric figure of merit (Z= α2*σ/æ) at, K |
340÷330 |
340÷330 |
340÷330 |
340÷330 |
Basic specification
N-type Bi2(TеSe)3 For T=300K:
α300=160÷170;
σ300=1700÷1500;
P-type (BiSb)2(TeSe)3:
α300=150÷160;
σ300=2000÷1800;
P and N-type materials average heat conductivity is æpn ~2,0
Maximum Z is at 340÷330K, and maximum ZT is at ~400÷390K.
For T=390K:
σn390~1220÷1080;
σp390~1250÷1120.