CN103252823B - A kind of forming method of Ultra-wear-resistantalumina alumina ceramic ball - Google Patents
A kind of forming method of Ultra-wear-resistantalumina alumina ceramic ball Download PDFInfo
- Publication number
- CN103252823B CN103252823B CN201310173794.7A CN201310173794A CN103252823B CN 103252823 B CN103252823 B CN 103252823B CN 201310173794 A CN201310173794 A CN 201310173794A CN 103252823 B CN103252823 B CN 103252823B
- Authority
- CN
- China
- Prior art keywords
- shaping
- ceramic ball
- resistantalumina
- metal pattern
- ultra
- 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.)
- Active
Links
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000007493 shaping process Methods 0.000 claims abstract description 27
- 238000002347 injection Methods 0.000 claims abstract description 21
- 239000007924 injection Substances 0.000 claims abstract description 21
- 229910052751 metal Inorganic materials 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 14
- 238000000498 ball milling Methods 0.000 claims abstract description 11
- 239000011265 semifinished product Substances 0.000 claims abstract description 8
- 241001408630 Chloroclystis Species 0.000 claims abstract description 3
- 238000005245 sintering Methods 0.000 claims abstract description 3
- 239000007921 spray Substances 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 5
- 239000005995 Aluminium silicate Substances 0.000 claims description 2
- 235000012211 aluminium silicate Nutrition 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 2
- 239000000454 talc Substances 0.000 claims description 2
- 235000012222 talc Nutrition 0.000 claims description 2
- 229910052623 talc Inorganic materials 0.000 claims description 2
- 239000000047 product Substances 0.000 abstract description 7
- 238000005299 abrasion Methods 0.000 abstract description 6
- 239000000919 ceramic Substances 0.000 description 26
- 239000000463 material Substances 0.000 description 9
- 238000007664 blowing Methods 0.000 description 6
- 238000001035 drying Methods 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000007906 compression Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 238000007670 refining Methods 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 238000005056 compaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 238000000462 isostatic pressing Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 239000012776 electronic material Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000006259 organic additive Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- -1 pottery Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention provides a kind of forming method of Ultra-wear-resistantalumina alumina ceramic ball, comprise through batching, ball milling, filter, deironing, press filt, the operations such as vacuum pugging provide moisture content to be 17 ~ 25% pugs, then described pug is sent into injection molded machine, die sinking immediately in pug high speed spray to metal pattern die cavity is made and shaping in 1/5 ~ 1/2 second, the injection pressure of insufflating procedure is 1 ~ 3MPa, the temperature of metal pattern when shaping controls at 130 ~ 200 DEG C, finally by the semi-finished product after shaping through 1450 DEG C of high temperature sinterings, be incubated 2 hours and obtain product, the equivalent abrasion of product reach 0.054 ‰, rupture strength reaches 320MPa, sphericity > 95%, the inventive method makes product main performance index be significantly improved, application is expanded.
Description
Technical field
The invention belongs to Inorganic Non-metallic Materials (pottery) field, be specifically related to a kind of forming method of Ultra-wear-resistantalumina alumina ceramic ball.
Background technology
Aluminium oxide (Al
2o
3) ceramic in high-tech and sophisticated industry, as the aspects such as aluminium oxide ceramic ball, microelectronics, nuclear reactor, magnetohydrodynamic generator, space flight, artificial bone and joint prosthesis obtain applying more and more widely.Wherein aluminium oxide ceramic ball is a kind of important engineering ceramics.Because aluminium oxide ceramic ball hardness is high, density is large, and charge in abrasive body can be made to increase; Ballstone is fine and close, neat specification, and the probability of collision is large, and grinding efficiency is high; The chemical composition of polished material is stablized, and therefore, aluminium oxide ceramic ball is widely used in raw material grinding and the processing of white cement, mineral, pottery, electronic material, magnetic material and the industry such as coating, paint, is a kind of conventional abrasive media.In Building Ceramics Industry, the wearing and tearing efficiency of aluminium oxide ceramic ball improves 20% ~ 40% than natural rubble and cobblestone.Along with the minimizing of the natural ballstone resource of high-quality, the feature that conventional ceramic ball loss late is high, aluminium oxide ceramic ball will use by increasing ceramic producer.Just because of this, one of field that chemistry and material subject are very active in studying in recent years is also become to the research of aluminium oxide ceramic ball.
Produce aluminium oxide ceramic ball, traditional forming method has dry-press process and wet moulding.The blank structure that dry-press process obtains is uneven, and powder is easily reunited.Wet moulding comprises injection forming and injection moulding, and they also exist various defect.Injection forming exists that base substrate moisture content is large, bulk density skewness, dry and burn till and shrink large, and Ceramic Balls size is difficult to control, the shortcomings such as production efficiency is low, injection moulding then needs the organic additive adding volume content 45%-50%, and degreasing time is long, and base substrate easily produces defect.The forming method of domestic current aluminium oxide ceramic ball mainly contains two kinds, is that isostatic compaction and rolling are shaping respectively.The many of current aluminium oxide forming method is isostatic compaction, isostatic compaction to treat that pressure sample is placed in high-pressure bottle, the character of the incompressible character of liquid medium and even transmission of pressure is utilized to carry out uniform pressurization from all directions to sample, when liquid medium is by compression pump injection pressure container, according to fluid mechanics principle, its pressure size is constant and be delivered evenly to all directions.The pressure that powder now in high-pressure bottle is subject in all directions is uniform and of the same size.Isostatic pressing method requires relatively strict to powder, there is problems such as being not easy to control, the qualification rate of product is low, efficiency is low, and rolling is shaping is unfavorable for robotic production, and manual operation intensity is large, wayward.Therefore, in order to meet the requirement of modern technologies, improve the reliability of product and reduce production cost, various Wetting moulding process arises at the historic moment.
Summary of the invention
The object of this invention is to provide a kind of forming method of Ultra-wear-resistantalumina alumina ceramic ball, the method can generate spherical base substrate by dead size, and the sphericity of product, abrasion, the performance indications such as rupture strength can be significantly improved.
In order to realize goal of the invention, the technical solution used in the present invention is: a kind of forming method of Ultra-wear-resistantalumina alumina ceramic ball, comprise and provide moisture content to be 17 ~ 25% pugs through operations such as batching, ball milling, filtration, deironing, press filt, vacuum puggings, composition of raw materials is: alumina powder 92wt%, kaolin 6wt%, talcum 0.6wt%, TZP 1.2wt%, La
2o
3/ Y
2o
30.2 wt%, it is characterized in that: described pug is sent into injection molded machine, die sinking immediately in pug high speed spray to metal pattern die cavity is made and shaping in 1/5 ~ 1/2 second, the injection pressure of insufflating procedure is 1 ~ 3 MPa, the temperature of metal pattern when shaping controls at 130 ~ 200 DEG C, then by the semi-finished product after shaping through 1450 DEG C of high temperature sinterings, be incubated 2 hours.
In above-mentioned ball milling operation, raw material is ball milling in ball mill, preferably runs 16 ~ 30 hours blowings.
Concrete technology step of the present invention is as follows:
One, raw mixture and water are proportionally put into ball mill ball milling, run 16 ~ 30 hours blowings;
Two, after mud enters pond, start mixer, take out pulp grinder, filter through vibratory sieve, flow into deironing stock tank simultaneously;
Three, after deironing stock tank, then by taking out stock pump by slush pump to slip drying press, slurry dewatering is made to make mud cake;
Four, mud cake is refined through vacuum deairing machine, and controlling moisture is 17 ~ 25%;
Five, the pug that step 4 obtained sends into the spout of injection molded machine, in 1/5 ~ 1/2 second, impose on pressure to plastic mud material, makes pug inject at a high speed die sinking immediately in metal pattern die cavity and shaping; Injection pressure in this process is 1 ~ 3 MPa, and the temperature of metal pattern when shaping controls at 130 ~ 200 DEG C;
Six, the semi-finished product after step 5 is shaping put into saggar, enter in kiln, burn till at 1450 DEG C, be incubated 2 hours.
The present invention compared with prior art, has following technical advantage: injection molded prepare green compact uniform microstructure, spherical base substrate can be generated by dead size, shaping sphericity is high; In addition in molding blank without the need to adding binding agent, and forming operation is simple, Ceramic Balls prepared by injection molded can improve the stuctures and properties of its sintered body, cause sintered ceramic spherical structure and performance more stable, can significantly improve reliability of material, effectively reduce material at work break and damaged.
The equivalent abrasion of the aluminium oxide ceramic ball adopting the inventive method to prepare can reach 0.054 ‰, rupture strength reaches 320 MPa, Mohs' hardness is 9, sphericity > 95%, the aluminium oxide ceramic ball that its abrasion, rupture strength are prepared than existing isostatic pressing method has had significant raising, and Mohs' hardness, sphericity all can reach the standard of existing aluminium oxide ceramic ball.Therefore the present invention utilizes insufflation formed alumina Ceramic Balls make Alumina Ceramics be further improved to a certain extent and expand its application.
Detailed description of the invention
Following example all adopts as aforementioned same composition of raw materials carries out contrast experiment's research, and wherein embodiment 1 ~ 3 is the embodiment of the present invention program, and embodiment 4 is the embodiment of prior art isostatic pressing method.
Embodiment 1
One, raw mixture and water are proportionally put into ball mill ball milling, run 20 hours blowings;
Two, after mud enters pond, start mixer, take out pulp grinder, filter through vibratory sieve, flow into deironing stock tank simultaneously;
Three, after deironing stock tank, then by taking out stock pump by slush pump to slip drying press, slurry dewatering is made to make mud cake;
Four, mud cake is again through vacuum deairing machine refining, makes moisture be 21%;
Five, the pug that step 4 obtained is sent into injection molded machine and impose on pressure to plastic mud material 0.5 in, makes its die sinking immediately and shaping in injection metal pattern die cavity at a high speed; Injection pressure in this process is 1.5MPa, and the temperature of metal pattern when shaping controls at 150 DEG C;
Six, the semi-finished product after step 5 is shaping put into saggar, enter in kiln, burn till at 1450 DEG C, be incubated 2 hours.
Embodiment 2
One, raw mixture and water are proportionally put into ball mill ball milling, run 25 hours blowings;
Two, after mud enters pond, start mixer, take out pulp grinder, filter through vibratory sieve, flow into deironing stock tank simultaneously;
Three, after deironing stock tank, then by taking out stock pump by slush pump to slip drying press, slurry dewatering is made to make mud cake;
Four, mud cake is again through vacuum deairing machine refining, makes moisture be 23%;
Five, the pug that step 4 obtained is sent into injection molded machine and impose on pressure to plastic mud material 0.4 in, makes its die sinking immediately and shaping in injection metal pattern die cavity at a high speed; Injection pressure in this process is 1MPa, and the temperature of metal pattern when shaping controls at 180 DEG C;
Six, the semi-finished product after step 5 is shaping put into saggar, enter in kiln, burn till under 1500 DEG C of conditions, be incubated after 2 hours, namely complete and fire.
Embodiment 3
One, raw mixture and water are proportionally put into ball mill ball milling, run 27 hours blowings;
Two, after mud enters pond, start mixer, take out pulp grinder, filter through vibratory sieve, flow into deironing stock tank simultaneously;
Three, after deironing stock tank, then by taking out stock pump by slush pump to slip drying press, slurry dewatering is made to make mud cake;
Four, mud cake is again through vacuum deairing machine refining, makes moisture be 25%;
Five, the pug that step 4 obtained was sent into injection molded machine and imposed on pressure to plastic mud material in 0.2 second, made it inject at a high speed die sinking immediately in metal pattern die cavity and shaping; Injection pressure in this process is 2MPa, and the temperature of metal pattern when shaping controls at 200 DEG C;
Six, the semi-finished product after step 5 is shaping put into saggar, enter in kiln, burn till at 1450 DEG C, be incubated 2 hours.
Embodiment 4
One, raw mixture and water are proportionally put into ball mill ball milling, run 20 hours blowings;
Two, after mud enters pond, start mixer, take out pulp grinder, filter through vibratory sieve, flow into deironing stock tank simultaneously;
Three, after deironing stock tank, then by taking out stock pump by slush pump to slip drying press, slurry dewatering is made to make mud cake;
Four, mud cake is again through vacuum deairing machine refining, makes moisture be 25%;
Five, pug step 4 obtained is sent into spray drying tower and is carried out granulation;
Six, powder good for granulation being sent into iso-static pressure shaping machine carries out shaping;
Seven, the semi-finished product after step 6 is shaping put into saggar, enter in kiln, burn till at 1450 DEG C, be incubated 2 hours.
According to industrial ceramics professional standard, aluminium oxide ceramic ball the various embodiments described above prepared is placed in polyurethane tank and carries out impact grinding with defined terms, detect the equivalent abrasion of aluminium oxide ceramic ball, and by the compression strength of compression strength instrument oxygen determination aluminium Ceramic Balls, the performance indications recording aluminium oxide ceramic ball see the following form:
Above result shows: embodiment 1, embodiment 2, embodiment 3 are significantly improved in abrasion than example 4, and the compression strength of product also slightly promotes.Adopt the inventive method can significantly improve the performance of existing alumina balls mill, and cost of material is lower, forming operation is simple, and equipment investment is little, reduces enterprise's production cost, enhances productivity, and suitable batch is produced.
Claims (2)
1. a forming method for Ultra-wear-resistantalumina alumina ceramic ball, comprise and provide moisture content to be 17 ~ 25% pugs through batching, ball milling, filtration, deironing, press filt, vacuum pugging operation, composition of raw materials is: alumina powder 92wt%, kaolin 6wt%, talcum 0.6wt%, TZP 1.2wt%, La
2o
3/ Y
2o
30.2 wt%, it is characterized in that: described pug is sent into injection molded machine, die sinking immediately in pug high speed spray to metal pattern die cavity is made and shaping in 1/5 ~ 1/2 second, the injection pressure of insufflating procedure is 1 ~ 3 MPa, the temperature of metal pattern when shaping controls at 130 ~ 200 DEG C, then by the semi-finished product after shaping through 1450 DEG C of high temperature sinterings, be incubated 2 hours.
2. the forming method of Ultra-wear-resistantalumina alumina ceramic ball as claimed in claim 1, is characterized in that: ball milling running time is 16 ~ 30 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310173794.7A CN103252823B (en) | 2013-05-13 | 2013-05-13 | A kind of forming method of Ultra-wear-resistantalumina alumina ceramic ball |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310173794.7A CN103252823B (en) | 2013-05-13 | 2013-05-13 | A kind of forming method of Ultra-wear-resistantalumina alumina ceramic ball |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103252823A CN103252823A (en) | 2013-08-21 |
| CN103252823B true CN103252823B (en) | 2015-08-12 |
Family
ID=48957203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310173794.7A Active CN103252823B (en) | 2013-05-13 | 2013-05-13 | A kind of forming method of Ultra-wear-resistantalumina alumina ceramic ball |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103252823B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110590340B (en) * | 2019-10-29 | 2022-04-01 | 洛阳市科创绿色建材研究院 | Preparation method of andalusite-containing high-wear-resistance alumina grinding body |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102247913A (en) * | 2011-04-18 | 2011-11-23 | 西峡县新锦耐化有限责任公司 | Technology for premixing powder part of refractory material in alumina ceramic ball mill |
| CN102491735A (en) * | 2011-11-22 | 2012-06-13 | 中国铝业股份有限公司 | Method for producing aluminium oxide ceramic ball |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005033392B4 (en) * | 2005-07-16 | 2008-08-14 | Center For Abrasives And Refractories Research & Development C.A.R.R.D. Gmbh | Nanocrystalline sintered bodies based on alpha alumina, process for their preparation and their use |
| CN101857444B (en) * | 2010-05-21 | 2013-09-11 | 河南华西耐火材料有限公司 | Thermal state ceramic jetting material for longevity type blast furnace |
| CN101947149B (en) * | 2010-10-08 | 2013-01-02 | 李亚东 | Artificial hip joint consisting of multilayer shell core composite structural components |
| CN102040386B (en) * | 2010-11-01 | 2012-09-26 | 濮阳濮耐高温材料（集团）股份有限公司 | Torpedo can spouting material and spouting method thereof |
-
2013
- 2013-05-13 CN CN201310173794.7A patent/CN103252823B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102247913A (en) * | 2011-04-18 | 2011-11-23 | 西峡县新锦耐化有限责任公司 | Technology for premixing powder part of refractory material in alumina ceramic ball mill |
| CN102491735A (en) * | 2011-11-22 | 2012-06-13 | 中国铝业股份有限公司 | Method for producing aluminium oxide ceramic ball |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103252823A (en) | 2013-08-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110483010B (en) | Large-size ceramic plate with good forming performance and high strength and preparation method thereof | |
| CN105254323B (en) | A kind of micropore corundum-mullite ceramics separation-membrane support and preparation method thereof | |
| CN102600939B (en) | Method for manufacturing nanometer zirconia ceramic reinforced wear-resisting steel ball | |
| CN104446457A (en) | Modified zirconium oxide ceramic material and application thereof | |
| CN102659421A (en) | Production method of mullite cast steel brick | |
| CN105555734A (en) | Pavers and block composite materials and methods of preparation thereof | |
| CN103496954B (en) | Process for manufacturing aluminum oxide ceramic nozzle | |
| CN103232229A (en) | Ultra-wear-resistant alumina ceramic ball and preparation method thereof | |
| CN103274674A (en) | Preparation method of alumina porcelain ball for dry process ball mill | |
| CN109336565A (en) | A kind of preparation method of Zirconia reinforced alumina wear-resistant ceramic | |
| CN107935608B (en) | Method for preparing zircon brick by using compact zircon aggregate | |
| CN102757215A (en) | Composite type high strength wear resistant ceramic ball and preparation method thereof | |
| CN107696235A (en) | A kind of molding method for preparing of zirconia ceramics cell phone rear cover | |
| CN103252823B (en) | A kind of forming method of Ultra-wear-resistantalumina alumina ceramic ball | |
| CN102757221A (en) | Method for manufacturing spiral-shaped ceramic spring | |
| CN106747620B (en) | Low-energy-consumption sintered water permeable brick and manufacturing method thereof | |
| CN103521692A (en) | Molding sand for casting aluminum and preparation method thereof | |
| CN105541305A (en) | Preparation method of silicon controlled rectifier product with inner diameter of 180mm | |
| CN108751940A (en) | A kind of architectural pottery and preparation method thereof containing copper tailing | |
| CN105170873A (en) | Novel modified molding sand | |
| CN102584249A (en) | Method for preparing thin-walled ceramic crucible | |
| CN104496490A (en) | Gelcasted ceramic green body and preparation method thereof | |
| CN105130489B (en) | A method of preparing porous ceramics using gangue | |
| CN103639396A (en) | Method for producing metallic titanium and titanium alloy castings through ceramic molds | |
| CN104609870A (en) | Preparation method of porous brick |
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 | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A forming method of super wear-resistant alumina ceramic ball Effective date of registration: 20220718 Granted publication date: 20150812 Pledgee: Jingdezhen branch of Postal Savings Bank of China Ltd. Pledgor: JINGDEZHEN BETTERWEAR NEW MATERIALS Co.,Ltd. Registration number: Y2022980010665 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230920 Granted publication date: 20150812 Pledgee: Jingdezhen branch of Postal Savings Bank of China Ltd. Pledgor: JINGDEZHEN BETTERWEAR NEW MATERIALS Co.,Ltd. Registration number: Y2022980010665 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A Forming Method of Ultra wear-resistant Alumina Ceramic Ball Effective date of registration: 20231018 Granted publication date: 20150812 Pledgee: Jingdezhen branch of Postal Savings Bank of China Ltd. Pledgor: JINGDEZHEN BETTERWEAR NEW MATERIALS Co.,Ltd. Registration number: Y2023980061649 |