Title:
VARISTOR AND ITS MANUFACTURE
Document Type and Number:
Japanese Patent JP3039224
Kind Code:
B2
Abstract:
PURPOSE: To make possible the integrated baking between a molded item and an Ag or Ag-Pd electrode by specifying the contents of bismuth and antimony in a varistor element.
CONSTITUTION: A varistor element 1 is made of a substance, where bismuth, ammonium, and antimony are added to lead oxides, so that the content of bismuth may be 0.1-4.0mol% in terms of bismuth oxides and that the mol ratio of antimony to the bismuth oxides may be (Sb2O3/Bi2O3)≤1.0 in terms of antimony oxides. Hereby, it becomes possible to bake the molded item of the varistor element 1 at a low temperature of, for example, 750-960°C, so the integrated baking with Ag or Ag-Pd electrodes 2a and 2b can be made. As a result, the heat energy accompanying the baking can be reduced, and further this obviates the necessity to provide an electrode baking process separately.
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Inventors:
Hideaki Tokunaga
Yasuo Wakahata
Naoki Mutoh
Yasuo Wakahata
Naoki Mutoh
Application Number:
JP24242893A
Publication Date:
May 08, 2000
Filing Date:
September 29, 1993
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
H01C7/112; H01C7/10; (IPC1-7): H01C7/10
Domestic Patent References:
| JP5243012A | ||||
| JP1289215A | ||||
| JP5234716A | ||||
| JP2156506A |
Attorney, Agent or Firm:
Fumio Iwahashi (2 others)