Table 4 The proportion of elements on sample surface.

From: Study on material and mechanical characteristics of silicone rubber shed of field-aged 110 kV composite insulators

Specimen

C

O

Al

Si

0a

53.16

25.05

0.55

21.24

10a middle

42.58

31.7

1.92

23.8

10a high voltage

45.55

28.85

2.01

23.6

20a middle

37.99

38.77

3.59

19.66

20a high voltage

30.74

41.85

6.07

21.34

26a middle

38.54

37.09

3.99

20.37

26a high voltage

42.11

35.12

2.79

19.98

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