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− 7.10
2Factorial+1−1− 5.82
3Factorial−1+1− 4.55
4Factorial+1+1− 3.46
5Factorial−1−1+ 6.42
6Factorial+1−1+ 5.67
7Factorial−1+1+ 3.90
8Factorial+1+1+ 3.34
9Axial−1.682000. 7.49
10Axial+1.682000. 5.94
11Axial0−1.68200. 7.53
12Axial0+1.68200. 3.43
13Axial00−1.6820. 3.94
14Axial00+1.6820. 3.26
15Central0000. 9.10
16Central0000. 9.10
17Central0000. 9.10
18Central0000. 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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