CN100426425C - Process for producing modified zinc oxide nonlinear resonance eliminator - Google Patents
Process for producing modified zinc oxide nonlinear resonance eliminator Download PDFInfo
- Publication number
- CN100426425C CN100426425C CNB2003101113916A CN200310111391A CN100426425C CN 100426425 C CN100426425 C CN 100426425C CN B2003101113916 A CNB2003101113916 A CN B2003101113916A CN 200310111391 A CN200310111391 A CN 200310111391A CN 100426425 C CN100426425 C CN 100426425C
- Authority
- CN
- China
- Prior art keywords
- zinc oxide
- burning
- raw material
- modified zinc
- sintering
- 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
Links
Abstract
The present invention relates to a technology for manufacturing a non-linear harmonic eliminator of modified zinc oxide, which orderly comprises the following working procedures: material selection, presintering, ball milling, blank pressing, sintering, heat treatment of silvering and glazing, assembly, testing, packing, etc. The technology of the present invention has the characteristics of reasonable design, short production period and high rate of finished products. A finished product manufactured by the technology has the advantages of small size, light weight, large heat capacity, high reliability, good protection performance and large circulation capability.
Description
Technical field:
The invention belongs to the high voltage power transmission and transforming field, particularly a kind ofly be used for eliminating the manufacture craft that electrical network produces the non-linear resonance eliminator of modified zinc oxide of ferro resonance.
Background technology:
Exist a large amount of nonlinear ferroelectric magnetic cell (non-linear inductor) in the power network as transformer, voltage transformer etc., its inductance since the saturated of iron core will constantly descend.Under the electrical network normal running (operation) conditions,, when condition of resonance is satisfied in the equivalent capacitance loop of its variation inductance and electrical network, will bring out the generation ferro resonance because certain excitation condition and voltage raise suddenly.In 6 to 35kV electrical networks, the ferro resonance that is caused by voltage transformer brings very big threat to the normal operation of electrical network.In order to suppress and to eliminate ferro resonance, except that not adopting electromagnetic potential transformer, changing the power system operating mode, the harmonic elimination measure of domestic normal employing at present is the damping resistance that increases oscillation circuit, promptly the neutral point at voltage transformer directly connects nonlinear damping resistor, suppresses ferro resonance effectively.Up to the present, resonance eliminator all adopts the ceramic material sintering that contains SiC to form, and the SiC pottery is general nonlinear resistive element, yet there are slow, defectives such as volume big, Heavy Weight of response time in it.
Summary of the invention:
It is little, in light weight to the objective of the invention is to invent a kind of volume, the manufacture craft of the non-linear resonance eliminator of modified zinc oxide that non-linear behaviour is good.
Technical solution of the present invention is achieved in that the manufacture craft of the non-linear resonance eliminator of a kind of modified zinc oxide, it is characterized in that technical process comprises successively: select materials, pre-burning, ball milling, pressed compact, sintering, by silver-colored glazing heat treatment, assembling, test, packing.
Select materials: be meant ceramic material and some additives selected for use based on zinc oxide.
Pre-burning: need before the pre-burning raw material is carried out granulation, utilize roughcast that raw material is carried out granulating and forming, be convenient to pre-burning.Calcined temperature is controlled between 700 ℃ to 900 ℃, 8 to 10 hours time, makes the raw material dehydration and reduces the raw material activity.Because the thermal coefficient of expansion difference of various raw materials is burnt till convergent force and is easily caused the porcelain body distortion; If the raw material space is many, the thermal conductivity in space is relatively poor, will influence the thermal stability of porcelain body.Raw material can overcome above defective through pre-burning, and reduces the activity of material, is convenient to sintering control, improves the stability of product.
Ball milling: be meant the particle of natural cooling after the pre-burning is pulverized that fineness makes the ceramic raw material after the pre-burning mix more even below 100 orders.
Pressed compact: being meant that Zinc oxide powder behind the ball milling adds pours extrusion forming in the mould into after glue stirs well.Pressure is controlled in 20Mpa to the 30Mpa scope, and pressure is too little, and the low increased number of stomata that easily produces of density causes the thermal conductivity of porcelain body to descend; Hypertonia easily causes the base substrate internal mechanical stresses to increase, even causes the base substrate fracture.
Sintering: temperature 20 to 26 hours time, kept 2 hours at 1250 ℃ of warm spots between 900 ℃ to 1300 ℃ at least.Selecting rational firing temperature is the key factor that influences the porcelain body performance, according to reaction mechanism, it is violent that base substrate reacts about 900 ℃, slow down programming rate this moment, the proper extension sintering time, diffusion for ion provides sufficient action time undoubtedly, helps intercrystalline mutual fusion, impels time crystal boundary to disappear.For whole porcelain body, suitably slow down programming rate, can avoid porcelain body distortion, cracking, improve rate of finished products.
By silver-colored glazing heat treatment: be meant with the crude green body of sintering successively two ends installing electrodes place by on silver layer, after the remainder glazing, heat-treat again, heat treatment temperature between 950 ℃ to 1050 ℃, 5 to 7 hours time.Silver, glazing and heat treatment are divided into three sintering processes successively traditionally, not only complexity but also consumes energy, and the production cycle is long.
It is reasonable that the present invention has technological design, with short production cycle, the characteristics that rate of finished products is high.The finished product that utilizes this explained hereafter to go out has that volume is little, in light weight, thermal capacity is big, reliability is high, protective value is good, and the big advantage of through-current capability.
Embodiment:
Select materials: select to contain 10 kilograms of zinc oxide ceramics powders, contain 0.5 kilogram of mixing of oxide addition such as antimonous oxide, bismuth oxide.When the raw material rugosity needs it is crushed to below 100 orders greater than 100 orders.
Pre-burning: utilize roughcast that the mixing raw material is carried out granulating and forming, and carry out pre-burning, temperature is controlled at about 750 ℃, pre-burning 9 hours.
Ball milling: the particle behind the pre-burning natural cooling is carried out ball mill grinding, fineness 110 orders.
Pressed compact: ball milling is obtained powder adding glue stir, go into the mould extrusion forming, pressure is controlled at about 25Mpa.
Sintering:, between 900 ℃ to 1300 ℃, 20 to 26 hours time, kept 3 hours at 1250 ℃ of warm spots with pressed compact kiln-firing after the demoulding.The temperature rising edge should slow down programming rate.
By silver-colored glazing heat treatment: with cooled sintered body two end electrodes place by last silver layer, remainder glazing after, go into kiln heat treatment.About 1000 ℃ of Heat Treatment Control temperature, after 6 hours time natural cooling semi-finished product.Assemble two electrodes after behind the index test, eligible is gone into packing.
Relevant physical property with the carborundum resonance eliminator of the non-linear resonance eliminator of modified zinc oxide and technical indicator contrast by above-mentioned explained hereafter goes out, see the following form:
Claims (3)
1. the manufacture craft of the non-linear resonance eliminator of modified zinc oxide is characterized in that technical process comprises successively: select materials, pre-burning, ball milling, pressed compact, sintering, by silver-colored glazing heat treatment, assembling, test, packing, wherein:
Pre-burning: temperature 8 to 10 hours time, makes the raw material dehydration and reduces the raw material activity between 700 ℃ to 900 ℃;
Ball milling: be meant the particle of natural cooling after the pre-burning is pulverized that fineness is below 100 orders.
Pressed compact: being meant that Zinc oxide powder behind the ball milling adds pours extrusion forming in the mould into after glue stirs evenly.
Sintering: temperature 20 to 26 hours time, kept 2 hours at 1250 ℃ of warm spots between 900 ℃ to 1300 ℃ at least.
By silver-colored glazing heat treatment: be meant with the crude green body of sintering successively two ends installing electrodes place by on silver layer, after the remainder glazing, heat-treat again, heat treatment temperature between 950 ℃ to 1050 ℃, 5 to 7 hours time.
2. the manufacture craft of the non-linear resonance eliminator of modified zinc oxide according to claim 1 is characterized in that needing raw material is carried out granulation before the pre-burning, utilizes roughcast that raw material is carried out granulating and forming.
3. the manufacture craft of the non-linear resonance eliminator of modified zinc oxide according to claim 1 is characterized in that pressed compact moulding moulding pressure is in 20Mpa to 30Mpa scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101113916A CN100426425C (en) | 2003-11-11 | 2003-11-11 | Process for producing modified zinc oxide nonlinear resonance eliminator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101113916A CN100426425C (en) | 2003-11-11 | 2003-11-11 | Process for producing modified zinc oxide nonlinear resonance eliminator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1617269A CN1617269A (en) | 2005-05-18 |
| CN100426425C true CN100426425C (en) | 2008-10-15 |
Family
ID=34759388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101113916A Expired - Fee Related CN100426425C (en) | 2003-11-11 | 2003-11-11 | Process for producing modified zinc oxide nonlinear resonance eliminator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100426425C (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034822A (en) * | 1988-02-02 | 1989-08-16 | 西安交通大学 | The manufacture method of zinc oxide resistance sheet |
| CN1078065A (en) * | 1992-04-23 | 1993-11-03 | 中国科学院新疆物理研究所 | Low voltage varistor material and technology |
| US5614138A (en) * | 1994-02-10 | 1997-03-25 | Hitachi Ltd. | Method of fabricating non-linear resistor |
| CN2510966Y (en) * | 2001-08-24 | 2002-09-11 | 郭道林 | Resonance eliminating device |
-
2003
- 2003-11-11 CN CNB2003101113916A patent/CN100426425C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034822A (en) * | 1988-02-02 | 1989-08-16 | 西安交通大学 | The manufacture method of zinc oxide resistance sheet |
| CN1078065A (en) * | 1992-04-23 | 1993-11-03 | 中国科学院新疆物理研究所 | Low voltage varistor material and technology |
| US5614138A (en) * | 1994-02-10 | 1997-03-25 | Hitachi Ltd. | Method of fabricating non-linear resistor |
| CN2510966Y (en) * | 2001-08-24 | 2002-09-11 | 郭道林 | Resonance eliminating device |
Non-Patent Citations (4)
| Title |
|---|
| 固相法与共沉淀包膜法制备氧化锌非线性电阻陶瓷粉体的比较. 王兰义，职建中.电瓷避雷器，第186(2)期. 2002 |
| 固相法与共沉淀包膜法制备氧化锌非线性电阻陶瓷粉体的比较. 王兰义，职建中.电瓷避雷器，第186(2)期. 2002 * |
| 氧化锌电阻片生产中新设备和新工艺的应用. 王兰义，职建中.电瓷避雷器，第179(1)期. 2001 |
| 氧化锌电阻片生产中新设备和新工艺的应用. 王兰义，职建中.电瓷避雷器，第179(1)期. 2001 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1617269A (en) | 2005-05-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101870584B (en) | Preparation method of molybdenum-based ultralow-temperature sintering microwave medium ceramic materials | |
| CN104529425B (en) | A kind of wide-temperature high-permeability MnZn Ferrite Materials and its manufacture method | |
| CN101700976B (en) | Formula of non-linear resistor for high voltage surge arrester and manufacturing method thereof | |
| CN105110786B (en) | Zinc oxide resistance sheet and preparation method thereof | |
| CN102320825B (en) | Low-temperature sintered microwave dielectric ceramic and sintering method thereof | |
| CN101388268B (en) | High magnetic conductive low temperature sintered NiCuZn ferrite material | |
| CN102167581B (en) | Li2O-NiO-TiO2 ternary low-temperature sintering microwave dielectric ceramic material and preparation method thereof | |
| CN100527290C (en) | A method for microwave sintering zinc oxide pressure-sensitive resistor | |
| CN101508560B (en) | Process for producing codoped In2O3 based pyroelectric material | |
| CN105645958A (en) | Preparation method of leadless antiferroelectric sodium niobate piezoelectric ceramic | |
| CN101640090A (en) | High performance soft magnetic ferrite materials doped with Ni-Zn series and preparation method thereof | |
| CN101613199A (en) | A kind of high-performance zinc oxide composite ceramic voltage dependent resistor material and preparation method | |
| CN101284730A (en) | Non-bismuth additive ZnO Low-voltage Varistor Ceramics and method for making same | |
| CN108455979A (en) | A kind of ultralow dielectric microwave dielectric ceramic materials and preparation method thereof | |
| CN102336523A (en) | High thermal conductivity rare earth/AIN/microcrystalline glass composite material and its preparation method | |
| CN108585809B (en) | Low-temperature sintered SiO2Microwave-based dielectric ceramic material and preparation method thereof | |
| CN107117959A (en) | A kind of high-curie temperature PTC thermal sensitive ceramic materials and preparation method thereof | |
| CN106747435A (en) | A kind of preparation method of the core shell structure microwave-medium ceramics of temperature stabilization | |
| CN100426425C (en) | Process for producing modified zinc oxide nonlinear resonance eliminator | |
| CN104513059A (en) | MnZn ferrite material with super-wide temperature and high permeability and manufacturing method of MnZn ferrite material | |
| CN106365632B (en) | Lead-free piezoceramic material of ternary system and preparation method thereof | |
| CN101286393B (en) | Stratified structure low-voltage ZnO piezoresistor preparation method | |
| CN101817682B (en) | Preparation method of SiC-B4C composite thermoelectric material | |
| KR101367719B1 (en) | Three-elements thermoelectric materials and fabrication method for the same | |
| CN104867641B (en) | High-inductance and high-permeability ferrite core for high-frequency transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Fuzhou Longyuan Electric Co. Ltd. Xin Antwerp Assignor: Zheng Chen Contract record no.: 2010350000268 Denomination of invention: Process for producing modified zinc oxide nonlinear resonance eliminator Granted publication date: 20081015 License type: Exclusive License Open date: 20050518 Record date: 20101019 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081015 Termination date: 20111111 |