CN1177328C - Zinc oxide linear resistance medium and its preparation method - Google Patents
Zinc oxide linear resistance medium and its preparation methodInfo
- Publication number
- CN1177328C CN1177328C CNB021404860A CN02140486A CN1177328C CN 1177328 C CN1177328 C CN 1177328C CN B021404860 A CNB021404860 A CN B021404860A CN 02140486 A CN02140486 A CN 02140486A CN 1177328 C CN1177328 C CN 1177328C
- Authority
- CN
- China
- Prior art keywords
- zinc oxide
- oxide
- linear resistance
- resistor
- preparation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The present invention relates to a linear resistor medium of zinc oxide and a manufacture method thereof. The linear resistor medium of zinc oxide is composed of the components of the following proportion by weight: 60 to 90% of zinc oxide, 1 to 10% of magnesium oxide, 1 to 20% of aluminum oxide and three to four kinds of 3 to 15% of multielement additive agent of titanium oxide, calcium oxide, mullite and spinel. The linear resistor medium of zinc oxide is formed by stir, ball milling, spraying, granulating, isostatic compaction and calcination in an electrothermal channel kiln at 1250 to 1350 DEG C, wherein the resistivity of the manufactured ceramic resistor medium is 1 to 10<4>ohm. cm, energy tolerance capability is larger than 800 joules /centimeter <3>, resistance temperature coefficient is reduced to 1*10 <-3>ohm/DEG C, and the non-linear index of voltage is smaller than or equal to 1.1. The linear resistor medium of zinc oxide is widely used for a switching resistor of a high-voltage breaker, a neutral grounding resistor of a power transformer, a high-energy absorption resistor of a low-voltage AC/DC circuit, power loading elements with various kinds resistance, etc.
Description
Technical field
The present invention relates to a kind of linear resistor medium and preparation method thereof.
Background technology
Ceramic linear resistor early is to be compound the making of base-material doping carbon dust by aluminium oxide, clay, and because of its sintered density is low, the energy tolerance is less than 300 joules/centimetre
3, and resistance value is nearly 10% 20-250 ℃ of drift, so can not satisfy of the instructions for use of power transmission and distribution system to high energy absorption resistance device; No. 96123503.9 documents of Chinese patent disclose a kind of Zinc oxide ceramic linear resistor and manufacture method thereof, the new ceramics resistance that makes with this method has good temp characteristic, advantage that the antisurge ability is big, but its described method is the laboratory research technology, be unsuitable for modern industrialization production, the energy tolerance of its goods is 680 joules/centimetre
3, not above 800 joules/centimetre
3, resistivity is 1 ohmcm, and Standard resistance range is narrow, and the non-linear to voltage index is 1.26, and is obviously higher, so its application is subjected to bigger restriction.
Summary of the invention
The purpose of this invention is to provide that a kind of integrated performance index is better, Standard resistance range is wide, low cost of manufacture, and can be fit to zinc oxide linear resistance medium of industrialization, modern production and preparation method thereof.
The total technical scheme of the present invention is: a kind of zinc oxide linear resistance medium, it is made of following component by weight percentage: zinc oxide 60-90%, magnesium oxide 1-10%, aluminium oxide 1-20%, multielement additive 3-15%, described multielement additive comprises: in titanium oxide, calcium oxide, mullite, the spinelle three kinds to four kinds, mullite wherein, spinelle are prefabricated synthetic component.
A kind of preparation method of zinc oxide linear resistance medium, it comprises the following steps:
(1) by weight percentage, zinc oxide 60-90%, magnesium oxide 1-10%, aluminium oxide 1-20%, multielement additive 3-15% get the raw materials ready, and described multielement additive comprises: in titanium oxide, calcium oxide, mullite, the spinelle three kinds to four kinds;
(2) raw material of getting ready is packed into agitating ball mill adds concentration and is 1%, weight is that raw material weighs 1.5 times polyvinyl alcohol water solution, carries out wet-milling 0.5-1 hour form slurry with the alumina porcelain ball;
(3) above-mentioned slurry is delivered to spray dryer and carry out granulation;
(4) the granulation material is packed into mould with the pressure of 20-30 MPa, is made the cylinder base substrate on isostatic pressing machine;
(5) with the above-mentioned base substrate demoulding, place electrothermal tunnel kiln to calcine, burn till in 1250-1350 ℃, be incubated 2-4 hour, firing period 24-28 hour;
(6) at last sintered body is cut into disk or circular, promptly make the resistor medium.
Mullite described in the above-mentioned steps, spinelle adopt the synthetic and levigate powder of calcining in advance, and described granularity of getting the raw materials ready is less than or equal to 3 microns, and described burning till is burning till continuously molding blank.
Beneficial effect of the present invention is summarized as follows:
By technical scheme of the present invention, with prefabricated mullite synthesizing, spinelle as additive component, can significantly improve the ceramic resistor linear properties and regulate and control the resistivity of medium, and porcelain sintering range wide (± 10 ℃), with superfine powder through stirring ball-milling, mist projection granulating, isostatic compaction step, can enhance productivity, assurance sintered article crystalline phase is organized fine and closely woven even, burning till step burns till molding blank continuously with electric heating tunnel kiln, help accurate temperature controlling, product sintering character high conformity, with short production cycle, be suitable for modern industrialization production.
With the zinc oxide linear resistance medium that the inventive method is produced, behind electrode, its resistivity can be accomplished 1-10
4Ohmcm, the energy tolerance is greater than 800 joules/centimetre
3, temperature coefficient of resistance is on average less than 1 * 10
-2Ohm/℃, non-linear to voltage index≤1.1, not only can be applicable to the neutral resistance device of switching-on resistance device, cable distribution line and the transformer of power high voltage circuit breaker, also can be widely used in the low pressure AC-DC Circuit can resistor and the power termination element of the various resistances in light current field as releasing as the high energy absorber element.
Embodiment
Embodiment with form is further described the present invention below:
The embodiment table
| Sequence number | 1 | 2 | 3 | 4 | 5 | 6 | |
| Be equipped with the composition weight % of section | Zinc oxide | 60.0 | 65.0 | 72.0 | 80.0 | 86.0 | 90.0 |
| Magnesium oxide | 8.0 | 10.0 | 6.0 | 3.0 | 5.0 | 1.0 | |
| Aluminium oxide | 20.0 | 10.0 | 16.0 | 8.0 | 6.0 | 1.0 | |
| Titanium oxide | 2.0 | 3.0 | 1.0 | 2.0 | 0.5 | 3.0 | |
| Calcium oxide | 3.0 | 3.0 | 2.0 | 1.0 | / | / | |
| Mullite | 7.0 | 6.0 | 3.0 | 4.0 | 1.5 | 2.0 | |
| Spinelle | / | 3.0 | / | 2.0 | 1.0 | 3.0 | |
| The wet-milling time (hour) | 1 | 1 | 0.8 | 0.8 | 0.5 | 0.5 | |
| Moulding pressure (MPa) | 20 | 25 | 25 | 25 | 20 | 30 | |
| Firing temperature (℃) | 1320 | 1280 | 1250 | 1280 | 1350 | 1300 | |
| Temperature retention time (hour) | 4 | 3 | 3 | 2 | 2 | 2 | |
| Firing period (hour) | 28 | 26 | 24 | 26 | 28 | 26 | |
| Remarks | Other processing step is with reference to total technical scheme | ||||||
In the foregoing description table, typical in embodiment 4, prepared ceramic linear resistor medium, resistivity is the 100-200 ohmcm, the energy tolerance is 827 joules/centimetre
3, temperature coefficient of resistance is (+0.5～-1.2) * 10
-3Ohm/℃, the non-linear to voltage index is 1.08.Embodiment 2 in addition, prepared ceramic linear resistor medium, resistivity is the 6000-7000 ohmcm, temperature coefficient of resistance is (+3.6～-15) * 10
-3Ohm/℃, the non-linear to voltage index is 1.1.
Claims (6)
1, a kind of zinc oxide linear resistance medium, it is characterized in that, it is made of following component by weight percentage: zinc oxide 60-90%, magnesium oxide 1-10%, aluminium oxide 1-20%, multielement additive 3-15%, described multielement additive comprises: in titanium oxide, calcium oxide, mullite, the spinelle at least three kinds.
2, zinc oxide linear resistance medium according to claim 1 is characterized in that, described mullite, spinelle are prefabricated synthetic component.
3, a kind of preparation method of zinc oxide linear resistance medium is characterized in that it comprises the following steps:
(1) by weight percentage, zinc oxide 60-90%, magnesium oxide 1-10%, aluminium oxide 1-20%, multielement additive 3-15% get the raw materials ready, and described multielement additive comprises: in titanium oxide, calcium oxide, mullite, the spinelle at least three kinds;
(2) raw material of getting ready is packed into agitating ball mill adds the aqueous solution that contains 1% weight polyvinyl, and addition is heavy 1.5 times of raw material, carries out wet-milling 0.5-1 hour form slurry with the alumina porcelain ball;
(3) above-mentioned slurry is delivered to spray dryer and carry out granulation;
(4) the granulation material is packed into mould with the pressure of 20-30 MPa, is made the cylinder base substrate on isostatic pressing machine;
(5) with the above-mentioned base substrate demoulding, place electrothermal tunnel kiln to calcine, burn till in 1250-1350 ℃, be incubated at least 2 hours, firing period at least 24 hours;
(6) at last sintered body is cut into disk or circular, promptly make the resistor medium.
4, the preparation method of zinc oxide linear resistance medium according to claim 3 is characterized in that, described mullite, spinelle adopt the synthetic and levigate powder of calcining in advance.
5, the preparation method of zinc oxide linear resistance medium according to claim 3 is characterized in that, described granularity of getting the raw materials ready is less than or equal to 3 microns.
6, the preparation method of zinc oxide linear resistance medium according to claim 3 is characterized in that, described burning till is burning till continuously molding blank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021404860A CN1177328C (en) | 2002-07-18 | 2002-07-18 | Zinc oxide linear resistance medium and its preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021404860A CN1177328C (en) | 2002-07-18 | 2002-07-18 | Zinc oxide linear resistance medium and its preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1395258A CN1395258A (en) | 2003-02-05 |
| CN1177328C true CN1177328C (en) | 2004-11-24 |
Family
ID=4750317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021404860A Expired - Fee Related CN1177328C (en) | 2002-07-18 | 2002-07-18 | Zinc oxide linear resistance medium and its preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1177328C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102584207A (en) * | 2012-02-09 | 2012-07-18 | 江苏大学 | Negative resistance temperature coefficient zinc oxide linear resistance ceramic material and preparation method |
| CN102584209B (en) * | 2012-02-23 | 2013-10-23 | 江苏大学 | ZnO-Pr6O11-base linear resistance material and preparation method thereof |
| CN106205917A (en) * | 2016-08-18 | 2016-12-07 | 陆川县华鑫电子厂 | A kind of high pressure resistant graphite linear resistance and preparation method thereof |
| CN106587954B (en) * | 2016-12-27 | 2019-09-03 | 中国西电电气股份有限公司 | A kind of ceramics carbon resistance and preparation method thereof |
-
2002
- 2002-07-18 CN CNB021404860A patent/CN1177328C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1395258A (en) | 2003-02-05 |
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Granted publication date: 20041124 Termination date: 20090818 |