CN105130417A - Pellet for injection molding of pressure-sensitive resistor, and preparation method thereof - Google Patents
Pellet for injection molding of pressure-sensitive resistor, and preparation method thereof Download PDFInfo
- Publication number
- CN105130417A CN105130417A CN201510521138.0A CN201510521138A CN105130417A CN 105130417 A CN105130417 A CN 105130417A CN 201510521138 A CN201510521138 A CN 201510521138A CN 105130417 A CN105130417 A CN 105130417A
- Authority
- CN
- China
- Prior art keywords
- pellet
- weight percent
- powder
- binding agent
- injection molding
- 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.)
- Granted
Links
Landscapes
- Producing Shaped Articles From Materials (AREA)
- Thermistors And Varistors (AREA)
Abstract
The invention discloses a pellet for injection molding of a pressure-sensitive resistor, and a preparation method thereof. The pellet comprises 70-95wt% of powder and 5-30wt% of a binder; the powder comprises 85-95wt% of zinc oxide and 5-15wt% of an additive; and the additive comprises 30-88wt% of paraffin, 5-30wt% of polymethyl methacrylate, 5-30wt% of ethylene-vinyl acetate copolymer and 2-10wt% of stearic acid. The pellet for injection molding of the pressure-sensitive resistor is used in injection molding to well solve the problem of internal stress of the pressure-sensitive resistor, avoid the edge missing and angle lacking phenomena appearing in the molding process of products and guarantee the consistency of the products; and the pressure-sensitive resistor produced by the using the pellet in the invention has the advantages of large density, uniform density and high mechanical strength.
Description
Technical field
The present invention relates to voltage dependent resistor forming field, particularly a kind of pellet and preparation method thereof of injection molding voltage dependent resistor.
Background technology
The production technology mainly dry pressing of traditional pressure sensitive resistance.Have many good qualities: as production efficiency is high, manually less, scrap rate is low, with short production cycle, the extrudate density of production is large, intensity is high, be applicable to mass industrialized production.Shortcoming is that the shape of moulding product has larger restriction, and blank strength is low, and base substrate interior solid is inconsistent, and the homogeneity of weave construction is relatively poor etc.Again due to dry-pressing formed generally can only the simple voltage dependent resistor of production structure, for the voltage dependent resistor of complexity, dry-pressing formedly generally can not disposablely to complete, need to complete by other technology and equipment, so not only increase operation, and add production cost and time, the consistence of product is not also ensured.Injection moulding can solve the problem of this respect well, can not only the simple voltage dependent resistor of disposable production structure, can also the voltage dependent resistor of disposable production structure complexity; The product blank strength of injection moulding is simultaneously very high, carrying in way is removed in production can not be damaged, and interiors of products does not have stress, and the density of product is large, density is homogeneous, can disposable production tens products even tens products when producing, production efficiency greatly improves.But be not suitable for the pellet of injection moulding production voltage dependent resistor at present, and the preparation method of such pellet.
Summary of the invention
Technical problem to be solved by this invention is to provide pellet of a kind of injection molding voltage dependent resistor and preparation method thereof.
Technical problem of the present invention is solved by following technical scheme:
A pellet for injection molding voltage dependent resistor, comprises each component of following weight percent:
Powder 70%-95%
Binding agent 5%-30%;
Described powder comprises each component of following weight percent:
Zinc oxide 85%-95%
Additive 5%-15%;
Described additive comprises each component of following weight percent:
Described binding agent comprises each component of following weight percent:
According to embodiment, following preferred technical scheme also can be adopted:
The weight percent of described powder is 80%, and the weight percent of described binding agent is 20%.
Described powder comprises the zinc oxide that weight percent is 90%, and weight percent is the additive of 10%.
Described additive comprises each component of following weight percent:
Described binding agent comprises each component of following weight percent:
Described paraffin is paraffin wax fully refined.
A preparation method for the pellet of described injection molding voltage dependent resistor, comprises the steps:
1) prepare binding agent: by heating paraffin to 120 DEG C-200 DEG C after paraffin all melts, add polymethylmethacrylate and ethylene-vinyl acetate copolymer, and after being stirred to and all dissolving, then add stearic acid, obtain binding agent;
2) powder is prepared: by agitating ball mill by zinc oxide and additive Homogeneous phase mixing, then calcine, after having calcined, be milled to the powder of certain particle size with ball mill;
3) banburying of powder and binding agent: first described powder is dried and be then cooled to room temperature, then by itself and described step 1) binding agent banburying in Banbury mixer of obtaining, obtain cake mass;
4) pulverizing of cake mass: the pellet described cake mass being crushed to suitable particle diameter.
According to embodiment, following preferred technical scheme also can be adopted:
Described step 2) in: the rotating speed of described agitating ball mill is 30r/min-60r/min, and Ball-milling Time is 30h-50h; The temperature of described calcining is 500 DEG C-700 DEG C, and calcination time is 1h-3h; Described certain particle size refers to 0.5 μm-2.0 μm.
Described step 3) in: the temperature of described oven dry is 80 DEG C-150 DEG C, and drying time is 1h-2h; Described room temperature refers to 20 DEG C-30 DEG C; Described in Banbury mixer during banburying, banburying temperature is 120 DEG C-200 DEG C, and the frequency of the agitator of Banbury mixer is 25Hz-65Hz, and the banburying time is 60min-120min.
Described step 4) be specially: with pulverizer, described cake mass is crushed to the pellet that median size is 3mm ~ 8mm.
Beneficial effect of the present invention comprises: pellet of the present invention is applicable to prepare voltage dependent resistor by injection molding technique, and pellet preparation method of the present invention can produce satisfactory pellet, keeps all even consistence of pellet, for injection molding is prepared.Use pellet injection molding voltage dependent resistor of the present invention, solve the problem of voltage dependent resistor shaped inner stress well, product stripping there will not be losing angle phenomenon, also guaranteed to the consistence of product; And with its voltage dependent resistor density of producing is large, density is homogeneous, mechanical strength is high, can disposable production tens products when producing, production efficiency greatly improves.
Embodiment
Below in conjunction with preferred embodiment the invention will be further described.
The invention provides a kind of pellet of injection molding voltage dependent resistor, comprise binding agent and powder, wherein binding agent comprises paraffin, polymethylmethacrylate, ethylene-vinyl acetate copolymer, stearic acid; Powder comprises zinc oxide and additive.
Binding agent is a kind of carrier existed in short-term, and it can make powder filling even become desired shape, and makes this shape remain to sintering beginning always.Although binding agent does not determine the chemical composition of the finished product, its can directly affect technique success, and binding agent must be mixed into even feeding for injection molding with powder.
Paraffin has the advantages such as fusing point is low, wetting property is good, molecular chain is short, viscosity is low, paraffin is good in the state current downflow of melting, and simple powder does not have good mobility in injector, under the paraffin of melting and the drive of other binding agent, just there is mobility, can injection molding.And paraffin is volatile, be conducive to degreasing.But adopt single paraffinic components injection molding, product strength is low, and paraffin melting point scope is narrower, and thermal debinding acutely carries out, and product there will be cracking phenomena.In order to improve product strength, and asymptotic the continuing of thermal debinding carries out, and base substrate there will not be cracking phenomena, needs to introduce polycomponent binding agent.
Polymethylmethacrylate and ethylene-vinyl acetate copolymer can strengthen the intensity of base substrate, simultaneously because their fusing point and paraffin exist very large difference, make thermal debinding can asymptoticly continue to carry out, product internal stress can be reduced to minimum, there will not be cracking phenomena.
Stearic acid is as tensio-active agent, because powder is polarity, binding agent is nonpolar, and the two not easily adsorbs, and produces precipitation during long-term heating, thus add that tensio-active agent is used as powder and binding agent contact medium; Tensio-active agent is made up of the non-polar group of hydrophilic polar group and oleophylic, the carboxyl of promoting agent is polarity, can be combined with powder, alkyl is nonpolar, can mix with binding agent, powder and binding agent can be attached together by such surfactant indirectly, ensure the even of batch mixing, and the effect of lubrication can be played between powder particle, between powder particle and die wall, thus reach the effect of banburying and injection.
Described powder comprises zinc oxide and additive, and described powder comprises zinc oxide that weight percent is 85%-95% and weight percent is the additive of 5%-15%.Described additive comprises each component (the weight percent sum of each component is 100%) of following weight percent: the manganous carbonate of 5%-8%, the bismuth oxide of 35%-50%, the tindioxide of 2%-4%, the cobalt sesquioxide of 15%-25%, the titanium dioxide of 5%-10%, the barium carbonate of 1%-3%, the Strontium carbonate powder of 0.1%-1%, the boric acid of 5%-20%, the nickel sesquioxide of 2%-10%, the aluminum nitrate of 0.1%-1%.By each component Homogeneous phase mixing of agitating ball mill by composition powder, then calcine at 500 DEG C of-700 DEG C of temperature, after having calcined, carry out with ball mill the powder being milled to granularity 0.5 μm-2.0 μm, oven dry can use.Because under this granularity, powder active is good, can effectively sinter, and crystalline structure is fine and close, and crystal grain is tiny homogeneous.
The banburying of powder and binding agent is a very crucial step.In this case, the allocation optimum of powder and binding agent is exactly crucial.In the present invention, the weight percent of binding agent is 5-30%, and the weight percent of powder is 70-95%.Binding agent very little can cause too high viscosity and the generation in space, thus makes shaping very difficult.Too much binding agent is also worthless, because when shaping, and too much binding agent meeting and powder separation, thus there is overlap, or base substrate uneven components.The more important thing is, a large amount of losses of composition when excessive binding agent can cause degreasing, after binding agent is removed, particle can not remain on original position, and after sintering, the bad phenomenon such as distortion, cracking appear in product.
Banburying is first dried by powder, takes out cooling, then it and binding agent are joined banburying in Banbury mixer according to proportioning, design temperature is 120 DEG C-200 DEG C, the frequency arranging agitator is 25Hz-65Hz, banburying 60min-120min, and namely banburying goes out the bright and clean cake mass of color and luster.
After the pulverizing of cake mass refers to pug cooling, carry out being crushed to the pellet that median size is 3mm-8mm with pulverizer, pellet easily enters injecting machine material tube injection molding.
Be further described the present invention below in conjunction with embodiment, the paraffin in following examples all adopts paraffin wax fully refined.
Embodiment 1
Present embodiments provide a kind of pellet of injection molding voltage dependent resistor, be made up of the component of following weight percent:
Powder 70%
Binding agent 30%;
Powder is made up of the component of following weight percent:
Zinc oxide 95%
Additive 5%;
Additive is made up of the component of following weight percent:
Binding agent is made up of the component of following weight percent:
The present embodiment additionally provides the preparation method of above-mentioned pellet, and its step comprises:
1) binding agent is prepared
First by heating paraffin to 120 DEG C, after paraffin all melts, add polymethylmethacrylate, ethylene-vinyl acetate copolymer, and constantly stir by stirring rod, after all dissolving, then add stearic acid, obtain binding agent, wherein add each amount of substance all according to above weight percent meter.
2) powder is prepared
Its Homogeneous phase mixing is made by agitating ball mill by according to the zinc oxide of above weight percent and additive, the rotating speed of described agitating ball mill is 40r/min, Ball-milling Time is 40h, then at 500 DEG C of temperature, carries out calcining 2h, is then milled to ball mill the powder that granularity is 1.0 μm.
3) banburying of powder and binding agent
First powder baking oven is dried, bake out temperature 120 DEG C, drying time is 2h, take out after drying and be cooled to room temperature, again by itself and step 1) binding agent that obtains mixes according to above weight percent and puts into Banbury mixer banburying, design temperature 180 DEG C, and the frequency arranging agitator is 25Hz, banburying 120min, obtains cake mass.
4) fragmentation of cake mass
By step 3) the cake mass pulverizer that obtains is crushed to the pellet that median size is 3mm, namely obtains the pellet of the present embodiment injection molding voltage dependent resistor.
Detect:
Injecting machine material tube injection molding put into by the pellet using the present embodiment to produce, wherein injection pressure 120bar, injecting rate 50g/s, make voltage dependent resistor, assessment injection molding production efficiency, carries out Mechanics Performance Testing by pull and push dynamometer to produced product, carries out density measurement simultaneously to voltage dependent resistor, and compare with the product of the molded production of conventional dry, detected result is in table 1.
Embodiment 2
Present embodiments provide a kind of pellet of injection molding voltage dependent resistor, be made up of the component of following weight percent:
Powder 75%
Binding agent 25%;
Powder is made up of the component of following weight percent:
Zinc oxide 88%
Additive 12%;
Additive is made up of the component of following weight percent:
Binding agent is made up of the component of following weight percent:
The present embodiment additionally provides the preparation method of above-mentioned pellet, and its step comprises:
1) binding agent is prepared
First by heating paraffin to 160 DEG C, after paraffin all melts, add polymethylmethacrylate, ethylene-vinyl acetate copolymer, and constantly stir by stirring rod, after all dissolving, then add stearic acid, obtain binding agent, wherein add each amount of substance all according to above weight percent meter.
2) powder is prepared
The zinc oxide of above weight percent and additive are made its Homogeneous phase mixing by agitating ball mill, the rotating speed of described agitating ball mill is 50r/min, and Ball-milling Time is 30h, then at 550 DEG C of temperature lower calcination 2h, after having calcined, be milled to ball mill the powder that granularity is 1.8 μm.
3) banburying of powder and binding agent
First powder baking oven is dried, bake out temperature 110 DEG C, drying time is 1.5h, taking-up is cooled to room temperature, again by itself and step 1) binding agent that obtains mixes according to above weight percent and puts into Banbury mixer banburying, design temperature 185 DEG C, and the frequency arranging agitator is 45Hz, banburying 120min, obtains cake mass.
4) fragmentation of cake mass
By step 3) the cake mass pulverizer that obtains is crushed to the pellet that median size is 5mm, namely obtains the pellet of the present embodiment injection molding voltage dependent resistor.
Detect:
Detection method is identical with embodiment 1, and detected result is in table 1.
Embodiment 3
Present embodiments provide a kind of pellet of injection molding voltage dependent resistor, be made up of the component of following weight percent:
Powder 80%
Binding agent 20%;
Described powder is made up of the component of following weight percent:
Zinc oxide 90%
Additive 10%;
Additive is made up of the component of following weight percent:
Binding agent is made up of the component of following weight percent:
The present embodiment additionally provides the preparation method of above-mentioned pellet, and its step comprises:
1) binding agent is prepared
First by heating paraffin to 180 DEG C, after paraffin all melts, add polymethylmethacrylate, ethylene-vinyl acetate copolymer, and constantly stir by stirring rod, after all dissolving, then add stearic acid, obtain binding agent, wherein add each amount of substance all according to above weight percent meter.
2) powder is prepared
Its Homogeneous phase mixing is made by agitating ball mill by according to the zinc oxide of above-mentioned weight percent and additive, the rotating speed of described agitating ball mill is 30r/min, Ball-milling Time is 50h, then at 600 DEG C of temperature lower calcination 2h, after having calcined, is milled to the powder that granularity is 1.8 μm with ball mill.
3) banburying of powder and binding agent
First powder baking oven is dried, bake out temperature 150 DEG C, drying time is 1h, taking-up is cooled to room temperature, again by itself and step 1) binding agent that obtains mixes according to above weight percent and puts into Banbury mixer banburying, design temperature 185 DEG C, and the frequency arranging agitator is 55Hz, banburying 120min, obtains cake mass.
4) fragmentation of cake mass
By step 3) the cake mass pulverizer that obtains is crushed to the pellet that median size is 8mm, namely obtains the pellet of the present embodiment injection molding voltage dependent resistor.
Detect:
Detection method is identical with embodiment 1, and detected result is in table 1.
Embodiment 4
Present embodiments provide a kind of pellet of injection molding voltage dependent resistor, be made up of the component of following weight percent:
Powder 85%
Binding agent 15%;
Powder is made up of the component of following weight percent:
Zinc oxide 89%
Additive 11%;
Additive is made up of the component of following weight percent:
Binding agent is made up of the component of following weight percent:
The present embodiment additionally provides the preparation method of above-mentioned pellet, and its step comprises:
1) binding agent is prepared
First by heating paraffin to 190 DEG C, after paraffin all melts, add polymethylmethacrylate, ethylene-vinyl acetate copolymer, and constantly stir by stirring rod, after all dissolving, then add stearic acid, obtain binding agent, wherein add each amount of substance all according to above weight percent meter.
2) powder is prepared
Its Homogeneous phase mixing is made by agitating ball mill by according to the zinc oxide of above-mentioned weight percent and additive, the rotating speed of described agitating ball mill is 45r/min, Ball-milling Time is 45h, then at 650 DEG C of temperature lower calcination 2h, after having calcined, is milled to the powder that granularity is 2.0 μm with ball mill.
3) banburying of powder and binding agent
First powder baking oven is dried, bake out temperature 130 DEG C, drying time is 1h, taking-up is cooled to room temperature, again by itself and step 1) binding agent that obtains mixes according to above weight percent and puts into Banbury mixer banburying, design temperature 190 DEG C, and the frequency arranging agitator is 55Hz, banburying 120min, obtains cake mass.
4) fragmentation of cake mass
By step 3) the cake mass pulverizer that obtains is crushed to the pellet that median size is 6mm, namely obtains the pellet of the present embodiment injection molding voltage dependent resistor.
Detect:
Detection method is identical with embodiment 1, and detected result is in table 1.
Embodiment 5
Present embodiments provide a kind of pellet of injection molding voltage dependent resistor, be made up of the component of following weight percent:
Powder 95%
Binding agent 5%;
Powder is made up of the component of following weight percent:
Zinc oxide 85%
Additive 15%;
Additive is made up of the component of following weight percent:
Binding agent is made up of the component of following weight percent:
The present embodiment additionally provides the preparation method of above-mentioned pellet, and its step comprises:
1) binding agent is prepared
First by heating paraffin to 200 DEG C, after paraffin all melts, add polymethylmethacrylate, ethylene-vinyl acetate copolymer, and constantly stir by stirring rod, after all dissolving, then add stearic acid, obtain binding agent, wherein add each amount of substance all according to above weight percent meter.
2) powder is prepared
Its Homogeneous phase mixing is made by agitating ball mill by according to the zinc oxide of above-mentioned weight percent and additive, the rotating speed of described agitating ball mill is 55r/min, Ball-milling Time is 35h, then at 700 DEG C of temperature lower calcination 2h, after having calcined, is milled to the powder that granularity is 1.5 μm with ball mill.
3) banburying of powder and binding agent
Banburying is first dried by powder baking oven, bake out temperature 100 DEG C, drying time is 2h, taking-up is cooled to room temperature, again by itself and step 1) binding agent that obtains mixes according to above weight percent and puts into Banbury mixer banburying, design temperature 180 DEG C, and the frequency arranging agitator is 65Hz, banburying 120min, obtains cake mass.
4) fragmentation of cake mass
By step 3) the cake mass pulverizer that obtains is crushed to the pellet that median size is 8mm, namely obtains the pellet of the present embodiment injection molding voltage dependent resistor.
Detect:
Detection method is identical with embodiment 1, and detected result is in table 1.
Table 1. voltage dependent resistor detects table
From embodiment 1-5 detected result, the product that the traditional dry-pressing formed method of the product mechanics Performance Ratio produced with the pellet of injection molding voltage dependent resistor of the present invention is produced will be got well, its product density is also greater than the product density that traditional dry-pressing formed method is produced, and production efficiency greatly improves.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For those skilled in the art, without departing from the inventive concept of the premise, some equivalent to substitute or obvious modification can also be made, and performance or purposes identical, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. a pellet for injection molding voltage dependent resistor, is characterized in that, comprises each component of following weight percent:
Powder 70%-95%
Binding agent 5%-30%;
Described powder comprises each component of following weight percent:
Zinc oxide 85%-95%
Additive 5%-15%;
Described additive comprises each component of following weight percent:
Described binding agent comprises each component of following weight percent:
2. the pellet of injection molding voltage dependent resistor as claimed in claim 1, it is characterized in that, the weight percent of described powder is 80%, and the weight percent of described binding agent is 20%.
3. the pellet of injection molding voltage dependent resistor as claimed in claim 1 or 2, it is characterized in that, described powder comprises the zinc oxide that weight percent is 90%, and weight percent is the additive of 10%.
4. the pellet of injection molding voltage dependent resistor as claimed in claim 1 or 2, it is characterized in that, described additive comprises each component of following weight percent:
5. the pellet of injection molding voltage dependent resistor as claimed in claim 1 or 2, it is characterized in that, described binding agent comprises each component of following weight percent:
6. the pellet of injection molding voltage dependent resistor as claimed in claim 1 or 2, it is characterized in that, described paraffin is paraffin wax fully refined.
7. a preparation method for the pellet of the injection molding voltage dependent resistor described in any one of claim 1-6, is characterized in that, comprise the steps:
1) prepare binding agent: by heating paraffin to 120 DEG C-200 DEG C after paraffin all melts, add polymethylmethacrylate and ethylene-vinyl acetate copolymer, and after being stirred to and all dissolving, then add stearic acid, obtain binding agent;
2) powder is prepared: by agitating ball mill by zinc oxide and additive Homogeneous phase mixing, then calcine, after having calcined, be milled to the powder of certain particle size with ball mill;
3) banburying of powder and binding agent: first described powder is dried and be then cooled to room temperature, then by itself and described step 1) binding agent banburying in Banbury mixer of obtaining, obtain cake mass;
4) pulverizing of cake mass: the pellet described cake mass being crushed to suitable particle diameter.
8. preparation method as claimed in claim 7, is characterized in that, described step 2) in: the rotating speed of described agitating ball mill is 30r/min-60r/min, and Ball-milling Time is 30h-50h; The temperature of described calcining is 500 DEG C-700 DEG C, and calcination time is 1h-3h; Described certain particle size refers to 0.5 μm-2.0 μm.
9. preparation method as claimed in claim 7, is characterized in that, described step 3) in: the temperature of described oven dry is 80 DEG C-150 DEG C, and drying time is 1h-2h; Described room temperature refers to 20 DEG C-30 DEG C; Described in Banbury mixer during banburying, banburying temperature is 120 DEG C-200 DEG C, and the frequency of the agitator of Banbury mixer is 25Hz-65Hz, and the banburying time is 60min-120min.
10. preparation method as claimed in claim 7, is characterized in that, described step 4) be specially: with pulverizer, described cake mass is crushed to the pellet that median size is 3mm ~ 8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510521138.0A CN105130417B (en) | 2015-08-21 | 2015-08-21 | A kind of pellet of injection moulding varistor and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510521138.0A CN105130417B (en) | 2015-08-21 | 2015-08-21 | A kind of pellet of injection moulding varistor and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105130417A true CN105130417A (en) | 2015-12-09 |
| CN105130417B CN105130417B (en) | 2017-03-29 |
Family
ID=54716065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510521138.0A Active CN105130417B (en) | 2015-08-21 | 2015-08-21 | A kind of pellet of injection moulding varistor and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105130417B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105622093A (en) * | 2015-12-30 | 2016-06-01 | 深圳市大富科技股份有限公司 | Ceramic material and preparation method thereof, and harmonic oscillator, filter and radio frequency zooming-out equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040195734A1 (en) * | 2002-07-25 | 2004-10-07 | Ryo Teraura | Method for manufacturing varistor and varistor |
| CN102674822A (en) * | 2012-04-20 | 2012-09-19 | 深圳顺络电子股份有限公司 | Injection molding granules for ferrite cores and production method thereof |
| CN103030390A (en) * | 2012-12-28 | 2013-04-10 | 深圳顺络电子股份有限公司 | Zinc oxide piezoresistor material and preparation method |
-
2015
- 2015-08-21 CN CN201510521138.0A patent/CN105130417B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040195734A1 (en) * | 2002-07-25 | 2004-10-07 | Ryo Teraura | Method for manufacturing varistor and varistor |
| CN102674822A (en) * | 2012-04-20 | 2012-09-19 | 深圳顺络电子股份有限公司 | Injection molding granules for ferrite cores and production method thereof |
| CN103030390A (en) * | 2012-12-28 | 2013-04-10 | 深圳顺络电子股份有限公司 | Zinc oxide piezoresistor material and preparation method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105622093A (en) * | 2015-12-30 | 2016-06-01 | 深圳市大富科技股份有限公司 | Ceramic material and preparation method thereof, and harmonic oscillator, filter and radio frequency zooming-out equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105130417B (en) | 2017-03-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102674822B (en) | Injection molding granules for ferrite cores and production method thereof | |
| CN102386381B (en) | Preparation method of nano positive material for lithium ion battery | |
| CN102642240B (en) | Manufacture method of ferrite core blank and ferrite core | |
| CN104725034A (en) | Feed material for injection-molding ferrite core formation and preparation method thereof | |
| CN110092644B (en) | Beryllium oxide ceramic injection molding method | |
| CN103030390B (en) | Zinc oxide piezoresistor material and preparation method | |
| CN103642253A (en) | Wax-based binder for compacting process in powder metallurgy as well as preparation method and application thereof | |
| CN110534719A (en) | A kind of preparation method for mixing magnalium nickel manganese spherical cobaltic-cobaltous oxide | |
| CN112794369B (en) | Preparation method and application of nano lithium cobalt oxide positive electrode material | |
| CN102584198A (en) | Method for pre-sintering soft magnetic manganese-zinc high-permeability powder in microwave kiln and preparation method of soft magnetic manganese-zinc high-permeability powder | |
| CN101604747B (en) | Preparation method of lithium iron phosphate anode material | |
| CN105720242A (en) | Method for modifying lithium ion battery cathode material | |
| CN106745260A (en) | A kind of method that utilization molten-salt growth method prepares copper-chrome black | |
| CN105084886B (en) | Piezo-resistance base substrate and preparation method thereof, piezo-resistance and preparation method thereof | |
| CN108649208A (en) | The low-temperature burning preparation method and positive electrode of spinel nickel LiMn2O4 | |
| CN105502953A (en) | Iron seal glass powder slurry and preparation method thereof | |
| CN105130417A (en) | Pellet for injection molding of pressure-sensitive resistor, and preparation method thereof | |
| CN102903925A (en) | Preparation method of Mg-doped ternary cathode material | |
| CN102157725B (en) | The method of microwave sintering synthesis nickel-cobalt-manganmultielement multielement lithium ion battery positive electrode material | |
| CN102276254B (en) | Method for modifying barium strontium titanate material through sol-gel doping technology | |
| CN104681807A (en) | Method for preparing high-potential cathode material lithium nickel manganese oxide of lithium battery | |
| CN103928679A (en) | Uniform mixing method of lithium salt and lithium ion cathode material precursor | |
| CN106348756A (en) | High-Q-value lithium-magnesium-niobium microwave dielectric ceramic | |
| CN103715421A (en) | Preparation method of high voltage lithium cobalt oxide anode material | |
| CN109192945A (en) | The flash burning preparation method of ternary anode material of lithium battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |