Varistor comprising an insulating layer produced from a loading base glass
A varistor includes a ceramic base body having a surface. The varistor also includes an insulating layer on at least a portion of the surface of the ceramic base body. The insulating layer includes a base glass and filler. The filler includes 3Al 2 O 3 2SiO 2 .
1. A varistor, comprising:
a ceramic body having a surface; and
an insulating layer on at least a portion of the surface of the ceramic body, the insulating layer comprising a base glass and a filler, wherein the filler comprises 3Al 2 O 3 2SiO 2 ;
wherein the base glass comprises ZnO and the base glass has a ZnO content by weight of from about 30% to about 50%.
2. The varistor of claim 1 , wherein the insulating layer has a filler content by weight of from about 5% to about 40%.
3. The varistor of claim 1 , wherein the base glass comprises B 2 O 3 and the base glass has a B 2 O 3 content by weight of from about 30% to about 40%.
4. The varistor of claim 1 , wherein the base glass comprises CuO and the base glass has a CuO content by weight less than or equal to about 10%.
5. The varistor of claim 1 , wherein the base glass comprises P 2 O 5 and has a P 2 O 5 content by weight of less than or equal to about 10%.
6. The varistor of claim 1 , wherein the ceramic body comprises end faces comprising metallizations.
7. The varistor of claim 1 , wherein the varistor comprises a multilayer varistor.
8. The varistor of claim 1 , wherein the insulating layer comprises material-strengthening fibers.
9. The varistor of claim 8 , wherein the material strengthening fibers comprise organic fibers.
10. The varistor of claim 1 , wherein the insulating layer comprises an organic composite material.
11. The varistor of claim 1 , wherein the insulating layer comprises an inorganic composite material.
12. The varistor of claim 1 , wherein the insulating layer comprises a material capable of being cured by increasing a temperature.
13. The varistor of claim 8 , wherein the fibers comprise inorganic fibers.
14. A varistor, comprising:
a ceramic body having a surface; and
an insulating layer on at least a portion of the surface of the ceramic body, the insulating layer comprising a base glass and filler, wherein:
the filler comprises 3Al 2 O 3 2SiO 2 ;
the insulating layer has a filler content by weight of from about 5% to about 40%; and
the base glass comprises:
from about 30% to about 50% ZnO by weight;
from about 30% to about 40% B 2 O 3 by weight;
less than or equal to about 10% CuO by weight; and
less than or equal to about 10% P 2 O 5 by weight.