| 摘要 |
Disclosed is a non-linear resistor of a sintered ZnO ceramics, which has a glass coating having a baking temperature higher than 850 DEG C. but a temperature lower than the sintering temperature of the sintered ZnO ceramics, and has a composition: (a) 30 to 75% by weight of SiO2, (b) 0.3 to 15% by weight of at least B2O3 and PbO, (c) 2 to 30% by weight of Al2O3, (d) less than 30% by weight of an alkaline earth metal oxide, (e) less than 40% by weight of ZnO, (f) less than 25% by weight of TiO2, and (g) less than 5% by weight of an alkali metal oxide. The glass coating baked at a range of 850 DEG C. to 1300 DEG C. provides non-linear resistors having a large non-linear coefficient and a high impulse current resistance as well as a good resistance to an acid and water.
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