Table 1 Investigated process parameters for spray experiments.

From: Using optical emission spectroscopy in atmospheric conditions to track the inflight reduction of plasma sprayed TiO2−x feedstock for thermoelectric applications

Case

Current (A)

Ar (slpm)

H2 (slpm)

Pin (kW)

Pnet (kW)

η = Pnet⋅Pin−1

h (MJ kg−1)

C/G (slpm)

1

550

47.5

0

18.4

9.1

50%

6.4

4

2

550

47.5

6

34.0

19.7

58%

13.9

3.5

3

550

65

6

35.3

22.4

64%

11.5

6

4

550

65

11

39.1

24.9

64%

12.8

7

  1. Slpm, standard liters per minute; Pin, electrical input power; Pnet, torch net power; η, torch efficiency; h, mass specific enthalpy; C/G, carrier gas.
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