Microstructure characterization and thermionic emission performance of barium-tungsten cathode

Table 1. [in Chinese]
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Table 1. [in Chinese]
level temperature/℃ holding time/min pressure/MPa
1 1500 1 15
2 1600 2 20
3 1700 3 25

Table 2. [in Chinese]
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Table 2. [in Chinese]
number A B C error porosity/%
1 1500 1 15 1 28.34
2 1500 2 20 2 25.33
3 1500 3 25 3 21.00
4 1600 2 15 3 22.05
5 1600 3 20 1 19.56
6 1600 1 25 2 21.97
7 1700 3 15 2 19.46
8 1700 1 20 3 18.15
9 1700 2 25 1 15.97

Table 3. [in Chinese]
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Table 3. [in Chinese]
A B C error
K 74.67 68.46 69.85 63.87
63.58 63.35 63.04 66.76
53.58 60.02 58.94 61.20
R 21.09 8.44 10.91 5.56

Table 4. [in Chinese]
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Table 4. [in Chinese]
source S_A f F α degree
temperature（A） 74.20 2 14.39 0.1 high
holding Time（B） 12.05 2 2.34 0.25 low
pressure（C） 20.25 2 3.93 0.25 middle
error 5.16 2
SUM 111.66 8

Table 5. [in Chinese]
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Table 5. [in Chinese]
temperature/℃ J_devwith different spherical matrix cathode/（A·cm⁻²）
23.4% 26.3% 30.5%
900 8.42 10.27 8.60
1000 10.66 14.77 11.43
1050 12.37 24.62 13.00
1100 13.95 33.07 14.56

Table 6. [in Chinese]
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Table 6. [in Chinese]
activated temperature/℃ J₀/（A·cm⁻²） Φ/eV
23.4% 26.3% 30.5% 23.4% 26.3% 30.5%
1050 3.79 7.62 3.10 2.03 1.95 2.05

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Ziyu Wang, Jihua Shang, Xinyu Yang, Jiuxing Zhang. Microstructure characterization and thermionic emission performance of barium-tungsten cathode[J]. High Power Laser and Particle Beams, 2021, 33(5): 053001

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