However, the nonlinear coefficient is found to be nearly unaffected and keeps at a comparably high level for the CeO2 added varistor materials.

• 发现CeO2具有明显的晶粒尺寸细化作用，因此能显著提高试样的击穿场强，与此同时试样的致密化程度和非线性仍保持在较高的水平。