JPS6072204A - Voltage/current nonlinear resistor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a voltage-current nonlinear resistor made of a sintered body containing zinc oxide (ZnO) as a main component.

[Technical background of the invention and its problems] Various voltage-current non-linear resistors have been studied in the past, and one of them uses a sintered body containing ZnO as a main component. In the case of using a sintered body mainly composed of ZnO, attempts have been made to add various subcomponents to obtain desired characteristics. The characteristics required of such voltage-current non-linear resistors include voltage-current non-linear characteristics, life characteristics, etc., but it is difficult to obtain a resistor that has excellent characteristics in all of them. For example, JP-A-49
As shown in No. 119188, Bi203, Coo, 5b203.
There are voltage-current nonlinear resistors to which NiO and MnO are added as subcomponents, but even in this case, sufficient voltage-current nonlinear characteristics are not obtained.

As described above, no conventional voltage-current non-linear resistor has been obtained that has both voltage-current non-linear characteristics and life characteristics. When the purpose is to absorb large surges, such as in lightning arresters, a device with excellent voltage-current nonlinear characteristics is particularly required.

[Object of the Invention] An object of the present invention is to provide a voltage-current nonlinear resistor that is excellent in both voltage-current nonlinear characteristics and life characteristics.

[Summary of the Invention] The present invention uses zinc oxide as the main component, and bismuth, co, nordite, manganese, antimony, nickel, aluminum, and barium as subcomponents, Bi20a and Coz0, respectively.
3. MnO, 5bzOa, NiO, M", 13aOK conversion, Bi20a O, 1-5rr+o1%, CO2O30
, 1-5 mog%.

MnO0.1~5 mol%, 5b2030.1~
5 mog%.

NiOOll ~5 mo1%, kll” 0.00
1~O,')5mO1%.

BaOo, o5~5ma6%.

This is a voltage/current nonlinear resistor characterized by being made of a sintered body.

The above (D (Bi 203 , CO2O3, Mn
By adopting a composition in which O, 5b203, NiO, AI'', and BaO are added, both voltage-current nonlinear characteristics and life characteristics are improved.

Bi 203 , 00203 , MnO, 5b203
．． The reason why NiO was set to 0.021 to 5 mail is that if it deviates from this range, the nonlinear characteristics and life characteristics will deteriorate.

Also, M is 0.001~o, osmoz* 111-
This is because the non-linear characteristics and life characteristics will be significantly deteriorated if the values are outside the ranges of t, h, and k.

By adding barium to this basic component, the life characteristics are improved. In other words, even with this basic component alone, the voltage and current non-direction #i! Although the properties and life characteristics are excellent, the life characteristics can be further improved by containing barium in an amount of 0.05 to 5 m01% in terms of BaO.

Also, BaO was added to 0. The reason why it was set at 0.05m01% is that if it is less than 0.05m01%, both the nonlinear characteristics and the life characteristics deteriorate.

The compact body in the present invention is formed by a commonly used method, for example, by mixing various components such as ZnO, press-forming the mixture into, for example, a disk shape, and firing at, for example, 1100 to 1350°C. Thereafter, electrodes are formed on both sides to obtain a voltage-current nonlinear resistor.

Further, in addition to the above-mentioned sum components, bismuth borosilicate glass may be included to further improve the life characteristics. For example, the main component is lead oxide, and the subcomponents are hismuth, cobalt, manganese, antimony, nickel, aluminum, barium, Bi2O5, and CO.
2O3, MnO, 5M0a, Nip, AI”,
Converted to BaO, Bi20a 0.1-5moA! %, CO2O30,
1-5mol LMnOQ, l-5mG7%, 5b20
3 Q, 1-5m0J%.

Njo 0.1-5mo1%, AA' 0.001-
0.05mo/%.

BaO 0.05-5 mol%.

and 0.01 to 0.01 to the main component and subcomponent.
This is a voltage/current nonlinear resistor characterized by being made of a sintered body containing 1.0 wt% of bismuth borosilicate glass. If the amount of bismuth borosilicate glass is less than 0.01 wt%, it will not be effective in improving the life characteristics;
．． If it exceeds 0wt%, both the voltage-current non-linear characteristics and the lifespan characteristics will deteriorate, so 0.01wt1wt chill 1.
A range of 1% is preferred.

[Effects of the Invention] As explained above, according to the present invention, a voltage-current nonlinear resistor having excellent both voltage-current nonlinear characteristics and life characteristics can be obtained. Therefore, it is suitable for use when absorbing large surges, such as in lightning arresters.

[Embodiments of the invention] The present invention will be explained in detail below.

Biz03. CO2O3, Mn
O, 8bzOs.

After preparing and mixing NiO, All (NO3) 3-9H20, BaO, and bismuth borosilicate glass as necessary in a desired composition ratio, the mixture was molded into a disc-shaped plate. After drying this plate material, it was fired at 1300° C. for about 2 hours and then polished on both sides to form a sintered body with a diameter of 20 mm and a thickness of 2 mm.

Electrodes were provided on both sides of this sample by M spraying to form a voltage-current nonlinear resistor, and various characteristics were measured.

The results are shown in Table 1. In Table 1, even if each composition is outside the scope of the present invention, it is shown as a comparative example. 1st
In the table, the voltage-current nonlinear characteristics are vI KA/v1t
nA ・l'j life% sex ha L20g te f.

L2oo was calculated by continuing to apply a voltage of 95% of 71 m at an ambient temperature of 150° C. and measuring the voltage (50 Hz sine wave peak voltage) when 1 mA was applied.

As is clear from Table 1 below, it can be seen that the examples of the present invention are superior to the comparative examples in both nonlinearity and life characteristics.

Continuation of page 1 0 shots by Takashi Takahashi Inside the office

Claims (1)

[Claims] The main component is zinc oxide, and the subcomponents are bismuth, cobalt, manganese, antimony, nickel, aluminum,
Barium is Bj 203 and CO2O3, respectively. MnO, 5b2C)3. NiO,AA! ”, converted to BaO, Bi2O30.1~5m0J%, CO2O3
0,1-5m01%. Mn0 0.1~5moJ%, 5b20a O,1~
5mo1%. NtOo, 1-5 moJ%, M3+0.00
1~0.05 m01% lBaO0.05~5moA
! %. A voltage/current nonlinear resistor comprising a sintered body.