CN107021520A - A kind of yttrium oxide powder and preparation method thereof - Google Patents
A kind of yttrium oxide powder and preparation method thereof Download PDFInfo
- Publication number
- CN107021520A CN107021520A CN201710427928.1A CN201710427928A CN107021520A CN 107021520 A CN107021520 A CN 107021520A CN 201710427928 A CN201710427928 A CN 201710427928A CN 107021520 A CN107021520 A CN 107021520A
- Authority
- CN
- China
- Prior art keywords
- oxide powder
- preparation
- yttrium oxide
- yttrium
- gained
- 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
- 239000000843 powder Substances 0.000 title claims abstract description 52
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 27
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 235000011187 glycerol Nutrition 0.000 claims abstract description 13
- 239000002243 precursor Substances 0.000 claims abstract description 13
- NGDQQLAVJWUYSF-UHFFFAOYSA-N 4-methyl-2-phenyl-1,3-thiazole-5-sulfonyl chloride Chemical compound S1C(S(Cl)(=O)=O)=C(C)N=C1C1=CC=CC=C1 NGDQQLAVJWUYSF-UHFFFAOYSA-N 0.000 claims abstract description 12
- 240000006063 Averrhoa carambola Species 0.000 claims abstract description 11
- 235000010082 Averrhoa carambola Nutrition 0.000 claims abstract description 11
- 238000001354 calcination Methods 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 238000001556 precipitation Methods 0.000 claims abstract description 7
- 238000001914 filtration Methods 0.000 claims abstract description 3
- 239000007788 liquid Substances 0.000 claims abstract description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 7
- BXJPTTGFESFXJU-UHFFFAOYSA-N yttrium(3+);trinitrate Chemical class [Y+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O BXJPTTGFESFXJU-UHFFFAOYSA-N 0.000 claims description 4
- 238000001291 vacuum drying Methods 0.000 claims description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical compound ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 6
- 239000011159 matrix material Substances 0.000 abstract description 5
- 239000007769 metal material Substances 0.000 abstract description 5
- 239000000470 constituent Substances 0.000 abstract description 2
- 239000013078 crystal Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 11
- 239000011259 mixed solution Substances 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 238000000227 grinding Methods 0.000 description 3
- 238000001027 hydrothermal synthesis Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 239000003643 water by type Substances 0.000 description 3
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241000219000 Populus Species 0.000 description 1
- 240000005809 Prunus persica Species 0.000 description 1
- 235000006040 Prunus persica var persica Nutrition 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000002242 deionisation method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010977 jade Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910000601 superalloy Inorganic materials 0.000 description 1
- 239000002887 superconductor Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000003828 vacuum filtration Methods 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F17/00—Compounds of rare earth metals
- C01F17/20—Compounds containing only rare earth metals as the metal element
- C01F17/206—Compounds containing only rare earth metals as the metal element oxide or hydroxide being the only anion
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The present invention relates to a kind of yttrium oxide powder and preparation method thereof, belong to a kind of material preparation process.The preparation method of yttrium oxide powder of the present invention, comprises the following steps：1) yttrium nitrate is dissolved in glycerine and water, then adjusts pH to react 14~16h to pH=8~10, then at 160~170 DEG C, obtain reaction solution；2) by step 1) gained reacting liquid filtering, scrubbed, dry the precursor powder of gained precipitation；3) by step 2) 2~3h of gained 600~700 DEG C of precursor powder calcining produce.The submicron order carambola shape yttrium oxide powder obtained using preparation method of the present invention, specific surface area is big, as metal material hardening constituent when, the special groove structure of carambola shape yittrium oxide preferably can be fixed in the matrix of metal material, the more effectively growth of limitation matrix, make crystal grain more tiny, with wider application.
Description
Technical field
The present invention relates to a kind of yttrium oxide powder and preparation method thereof, belong to a kind of material preparation process.
Background technology
With the progress of science and technology, superconductor, ceramic material, fluorescent material fast development, the preparation of rare earth powder
Extensive concern is also received with application.Rare earth oxide yittrium oxide in high temperature alloy there is stronger oxide dispersion intensifying to make
With, and using more in fluorescent material, high-strength alloy and superalloy.Therefore the preparation of yttrium oxide powder turns into and ground
One of focus studied carefully.
Wang Ying etc. delivered in 2013 in functional material one on《The growth of the bar-shaped yttrium oxide powder of Hydrothermal Synthesiss
The research of journey and growth mechanism》Report, its specific preparation method is：The water yttrium nitrates of 0.58g six are dissolved in 10ml deionizations
In water, ammoniacal liquor is then added, is added in constant temperature blender with magnetic force and stirs in drop, gained colloidal substance adjusts pH to 9, hydro-thermal reaction
Temperature control reacts 2~8h at 80~180 DEG C, and cooled product centrifugation, washing, drying at room temperature, 600 DEG C of high-temperature heat treatment 4h obtain oxygen
Change yttrium nanometer rods.
Nanometer rods yittrium oxide is small with alloy contact face in alloy preparation process, it is impossible to preferably strengthen stabilized matrix phase.
Therefore, the application prospect that a kind of big yttrium oxide powder of specific surface area has had is researched and developed.
The content of the invention
It is an object of the invention to provide a kind of preparation method of yttrium oxide powder, a kind of big poplar of specific surface area has been obtained
Peach shape yttrium oxide powder.
Second purpose of the invention be to provide a kind of yttrium oxide powder obtained using above-mentioned preparation method, and its profile is
Carambola shape.
To achieve the above object, the technical scheme is that：
A kind of preparation method of yttrium oxide powder, comprises the following steps：
1) yttrium nitrate, glycerine, water are well mixed and solution is made, then adjust pH to 8~10, then it is anti-at 160~170 DEG C
14~16h is answered, reaction solution is obtained；
2) by step 1) gained reacting liquid filtering, scrubbed, dry the precursor powder of gained precipitation；
3) by step 2) 2~3h of gained 600~700 DEG C of precursor powder calcining produce.
Step 1) in yttrium nitrate be six water yttrium nitrates.Step 1) reclaimed water be deionized water.
Step 1) in by yttrium nitrate, glycerine, water is well mixed that concretely comprising the following steps for solution is made：First add into yttrium nitrate
Enter glycerine, add water.
Step 1) in per 5g yttrium nitrates, correspondence adds 10~15mL glycerine and 40~45mL water.
Step 1) in adjust pH use ammoniacal liquor.
Step 1) in preferred adjust pH to be 10.
Step 1) in adjust pH to 8~10 after, solution is placed in autoclave, then 160~170 DEG C react 14~
16h.The volume of the autoclave is 100mL.The compactedness of solution is 50%~70% in above-mentioned autoclave.
Step 2) in be filtered into vacuum filtration.
Step 2) in washing be with deionized water to washing of precipitate 5~6 times.
Step 2) in dry for 60~80 DEG C vacuum drying 4~6h.
Step 2) middle gained precursor powder ground processing before calcination.
Step 3) in 600~700 DEG C calcining 2~3h after, be air-cooled to room temperature.
A kind of yttrium oxide powder that preparation method using above-mentioned yttrium oxide powder is obtained, its profile is carambola shape.It is described
Yttrium oxide powder length direction average-size is about 6 μm.The horizontal average-size of the yttrium oxide powder is about 2 μm.
The preparation of yttrium oxide powder of the present invention, using hydrothermal synthesis method, adds organic solvent glycerine and hinders intercrystalline
Reunite, realize the transformation of shape, and glycerine is not involved in the precipitation reaction of yttrium nitrate and ammoniacal liquor.Obtained using preparation method of the present invention
The submicron order carambola shape yttrium oxide powder arrived, specific surface area is big, has strong binding ability with metal material, is used as metal material
During the hardening constituent of material, the special groove structure of carambola shape yittrium oxide preferably can be fixed in the matrix of metal material, more had
The growth of the limitation matrix of effect, makes crystal grain more tiny, with wider application.
Brief description of the drawings
Fig. 1 is the XRD of the gained yttrium oxide powder of embodiment 1；
Fig. 2 schemes for the SEM of the gained yttrium oxide powder of embodiment 1.
Embodiment
Embodiments of the present invention are described further below in conjunction with the accompanying drawings.
Embodiment 1
The preparation method of the present embodiment yttrium oxide powder, comprises the following steps：
1) six water yttrium nitrate 5g are weighed, glycerine 10mL is added, then adds 45mL deionized waters, obtain solution A, to
Ammoniacal liquor is instilled in solution A and adjusts pH=8, mixed solution B is obtained；
2) by step 1) obtained mixed solution B is put into the autoclave of 100mL polytetrafluoroethyllining linings, in baking oven
In 170 DEG C of reaction 15h, obtained precipitation will be reacted and be filtered by vacuum, be washed with deionized 5 times, 60 DEG C in drying box
4h is dried in vacuo, precursor powder is obtained；
3) by step 2) grinding of obtained precursor powder, then 600 DEG C of calcining 3h in Muffle furnace, are air-cooled to room temperature,
Obtain carambola shape yttrium oxide powder.
Embodiment 2
The preparation method of the present embodiment yttrium oxide powder, comprises the following steps：
1) six water yttrium nitrate 5g are weighed, glycerine 15mL is added, then adds 40mL deionized waters, obtain solution A, to
Ammoniacal liquor is instilled in solution A and adjusts pH=9, mixed solution B is obtained；
2) by step 1) obtained mixed solution B is put into the autoclave of 100mL polytetrafluoroethyllining linings, in baking oven
In 160 DEG C of reaction 14h, obtained precipitation will be reacted and be filtered by vacuum, be washed with deionized 5 times, 70 DEG C in drying box
5h is dried in vacuo, precursor powder is obtained；
3) by step 2) grinding of obtained precursor powder, then 700 DEG C of calcining 2h in Muffle furnace, are air-cooled to room temperature,
Obtain carambola shape yttrium oxide powder.
Embodiment 3
The preparation method of the present embodiment yttrium oxide powder, comprises the following steps：
1) six water yttrium nitrate 5g are weighed, glycerine 12mL is added, then adds 42mL deionized waters, obtain solution A, to
Ammoniacal liquor is instilled in solution A and adjusts pH=10, mixed solution B is obtained；
2) by step 1) obtained mixed solution B is put into the autoclave of 100mL polytetrafluoroethyllining linings, in baking oven
In 170 DEG C of reaction 16h, obtained precipitation will be reacted and be filtered by vacuum, be washed with deionized 6 times, 60 DEG C in drying box
4h is dried in vacuo, precursor powder is obtained；
3) by step 2) grinding of obtained precursor powder, then 600 DEG C of calcining 2h in Muffle furnace, are air-cooled to room temperature,
Obtain carambola shape yttrium oxide powder.
Experimental example 1
XRD tests are carried out to the gained yttrium oxide powder of embodiment 1, as a result as shown in Figure 1.As shown in Figure 1, X-ray diffraction
Figure is completely the same with Jade standard cards (NO.43-1036), and it is Y to react obtained powder2O3。
Embodiment 2
SEM tests are carried out to the gained yttrium oxide powder of embodiment 1, as a result as shown in Fig. 2 as shown in Figure 2, gained yittrium oxide
Powder is carambola shape, with groove structure, and particle is uniform, and specific surface area is big.
Claims (6)
1. a kind of preparation method of yttrium oxide powder, it is characterised in that comprise the following steps：
1) yttrium nitrate, glycerine, water are well mixed and solution is made, then adjust pH to react 14 to 8~10, then at 160~170 DEG C
~16h, obtains reaction solution；
2) by step 1) gained reacting liquid filtering, scrubbed, dry the precursor powder of gained precipitation；
3) by step 2) 2~3h of gained 600~700 DEG C of precursor powder calcining produce.
2. the preparation method of yttrium oxide powder according to claim 1, it is characterised in that step 1) in by yttrium nitrate, third
Triol, water are well mixed to be made concretely comprising the following steps for solution：Glycerine is first added into yttrium nitrate, water is added.
3. the preparation method of yttrium oxide powder according to claim 1, it is characterised in that step 1) in per 5g yttrium nitrates pair
10~15mL glycerine and 40~45mL water should be added.
4. the preparation method of yttrium oxide powder according to claim 1, it is characterised in that step 1) in adjust pH to use ammonia
Water.
5. the preparation method of yttrium oxide powder according to claim 1, it is characterised in that step 2) in dry be 60~80
DEG C vacuum drying 4~6h.
6. a kind of yttrium oxide powder made from preparation method using yttrium oxide powder as claimed in claim 1, its feature exists
In its profile is carambola shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710427928.1A CN107021520B (en) | 2017-06-08 | 2017-06-08 | A kind of yttrium oxide powder and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710427928.1A CN107021520B (en) | 2017-06-08 | 2017-06-08 | A kind of yttrium oxide powder and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107021520A true CN107021520A (en) | 2017-08-08 |
| CN107021520B CN107021520B (en) | 2019-04-02 |
Family
ID=59531867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710427928.1A Active CN107021520B (en) | 2017-06-08 | 2017-06-08 | A kind of yttrium oxide powder and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107021520B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112194165A (en) * | 2020-10-09 | 2021-01-08 | 上海第二工业大学 | Yttrium oxide nanorod and preparation method thereof |
| CN113772712A (en) * | 2020-07-29 | 2021-12-10 | 英迪那米(徐州)半导体科技有限公司 | Synthesis method of nano yttrium oxide powder |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445354A (en) * | 2014-12-13 | 2015-03-25 | 广西科技大学 | Hydrothermal synthetic method of nano yttrium oxide powder |
-
2017
- 2017-06-08 CN CN201710427928.1A patent/CN107021520B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445354A (en) * | 2014-12-13 | 2015-03-25 | 广西科技大学 | Hydrothermal synthetic method of nano yttrium oxide powder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113772712A (en) * | 2020-07-29 | 2021-12-10 | 英迪那米(徐州)半导体科技有限公司 | Synthesis method of nano yttrium oxide powder |
| CN112194165A (en) * | 2020-10-09 | 2021-01-08 | 上海第二工业大学 | Yttrium oxide nanorod and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107021520B (en) | 2019-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Patil et al. | Synthesis techniques and applications of rare earth metal oxides semiconductors: A review | |
| CN109019656B (en) | Method for producing nano rare earth oxide powder | |
| CN107052356B (en) | A kind of preparation method of the tungsten of core-shell structure-yttrium oxide superfine composite precursor powder | |
| CN106564927A (en) | Preparation method of superfine yttrium oxide doped tungsten composite precursor powder | |
| Qin et al. | Application of urea precipitation method in preparation of advanced ceramic powders | |
| CN106077695A (en) | A kind of preparation method of high-copper tungsten copper nano composite powder | |
| CN108675336A (en) | The method that microwave cooperates with auxiliary liquid phase synthesis nanometer rare earth oxide ball with the double outfields of ultrasonic wave | |
| Wang et al. | Microwave synthesis of homogeneous YAG nanopowder leading to a transparent ceramic | |
| CN106064836B (en) | A kind of modified green syt nano-sized iron oxide and its preparation method and application | |
| CN109160544A (en) | A kind of preparation method of rare earth-transition metal composite oxide porous hollow ball | |
| CN104528799A (en) | Preparation method of ultrafine magnesium-based rare earth hexaaluminate powder | |
| CN107021520A (en) | A kind of yttrium oxide powder and preparation method thereof | |
| Mahmoud et al. | Physicochemical properties of pseudobrookite Fe2TiO5 synthesized from ilmenite ore by co-precipitation route | |
| CN103936082B (en) | A kind of synthetic method of cobalt acid samarium nano-powder | |
| CN102659154A (en) | Method for preparing nano alpha-Al2O3 powder | |
| CN102557151B (en) | Method for preparing nanometer ferroferric oxide powder by reducing at one step | |
| CN105000586B (en) | One-step synthesizing method of high-dispersion and weak-agglomeration doped ceria | |
| Gao et al. | Synthesis and luminescent properties of uniform monodisperse LuPO4: Eu3+/Tb3+ hollow microspheres | |
| CN101786669B (en) | Alpha-ferric oxide mesoscopic crystal preparation method | |
| Li et al. | Ethanol-dependent solvothermal synthesis of monodispersed YAG powders with precursor obtained through bubbling ammonia | |
| Jiu et al. | Preparation and luminescent properties of hollow Y2O3: Tb3+ microspheres | |
| CN107903072B (en) | Method for preparing strontium barium niobate nano powder by two-step coprecipitation method | |
| Li et al. | A general and facile method to prepare uniform gamma-alumina hollow microspheres from waste oil shale ash | |
| CN108435179A (en) | A kind of preparation method of the monatomic ammonia synthesis catalyst of double activated | |
| Srisombat et al. | Chemical synthesis of magnesium niobate powders |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231225 Address after: 150400 Binxi economic and Technological Development Zone, Binxi Town, Binxian County, Harbin City, Heilongjiang Province Patentee after: Harbin Peize Material Technology Co.,Ltd. Address before: Room 2226, 22nd Floor, No. 66 Cuilong Street, Longquan Street, Longquanyi District, Chengdu City, Sichuan Province, 610100 Patentee before: Sichuan Panyingda Technology Co.,Ltd. Effective date of registration: 20231225 Address after: Room 2226, 22nd Floor, No. 66 Cuilong Street, Longquan Street, Longquanyi District, Chengdu City, Sichuan Province, 610100 Patentee after: Sichuan Panyingda Technology Co.,Ltd. Address before: 471003 No. 48, Xiyuan Road, Jianxi District, Henan, Luoyang Patentee before: HENAN University OF SCIENCE AND TECHNOLOGY |
|
| TR01 | Transfer of patent right |