The Scientific World Journal / 2014 / Article / Tab 2

Research Article

Optimization of Bi2O3, TiO2, and Sb2O3 Doped ZnO-Based Low-Voltage Varistor Ceramic to Maximize Nonlinear Electrical Properties

Table 2

The five-level experimental design of the three additives, Bi2O3, TiO2, and Sb2O3, as ceramic initial powders used in ZnO-based low-voltage varistor. The data was presented by coded and actual values.

RunType Coded variable Actual variable (alpha)
Bi2O3 TiO2Sb2O3Actual valuePredicted value

1Factorial−1−1−10.30.30.27.19 7.10
2Factorial+1−1−10.70.30.26.62 5.82
3Factorial−1+1−10.30.70.24.82 4.55
4Factorial+1+1−10.70.70.23.45 3.46
5Factorial−1−1+10.30.30.46.97 6.42
6Factorial+1−1+10.70.30.45.95 5.67
7Factorial−1+1+10.30.70.43.65 3.90
8Factorial+1+1+10.70.70.43.80 3.34
9Axial−1.682000.20.50.37.36 7.49
10Axial+1.682000.90.50.35.29 5.94
11Axial0−1.68200.50.20.36.77 7.53
12Axial0+1.68200.50.90.33.41 3.43
13Axial00−1.6820.50.50.13.51 3.94
14Axial00+1.6820.50.50.52.91 3.26
15Central0000.50.50.38.93 9.10
16Central0000.50.50.39.30 9.10
17Central0000.50.50.39.39 9.10
18Central0000.50.50.39.83 9.10
19Central 0 0 00.50.5 0.38.85 9.10
20Central 0 0 00.50.5 0.38.46 9.10

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