US5989514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processing of vanadium oxide particles with heat
Assignee: Neophotonics Corp
•
Filing: 1997-07-21
•
Granted: 1999-11-23
•
Expires: 2017-07-21
Abstract
Abstract The stoichiometry and/or crystal structure of vanadium oxide particles are altered by heating initial particles of vanadium oxide under mild conditions. The temperature is generally at least about 300° C. less than the melting point of both the initial vanadium oxide particle and the product vanadium oxide particles. Preferred initial particles are vanadium oxide nanoparticles. The heating can be performed under an oxidizing atmosphere or an inert atmosphere, depending on the particular initial particles and the desired product particles.
Inventors
- 👤 Xiangxin Bi
- 👤 James T. Gardner
- 👤 Sujeet Kumar
- 👤 Nobuyuki Kambe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:42
CPC Classifications
C; C01; C01G; C01G31/00; C01G31/02; B; B82; B82Y; B82Y30/00; H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/485; H01M4/62; H01M4/621; H01M4/622; H01M4/623; C01P; C01P2002/00; C01P2002/02; C01P2002/70; C01P2002/72; C01P2004/00; C01P2004/01; C01P2004/03; C01P2004/30; C01P2004/32; C01P2004/51; C01P2004/60; C01P2004/62; C01P2004/64; C01P2006/00; C01P2006/12; H01M10/00; H01M10/05; H01M10/052; H01M10/0525; H01M2004/021; H01M4/58; H01M4/5825; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
78 words
A process for converting nanoparticles of vanadium oxide to another form of vanadium oxide, the process comprising heating the nanoparticles of vanadium oxide in an oxidizing or inert atmosphere at a temperature between about 60° C. and about 800° C., the temperature being below the melting point of both the nanoparticles of vanadium oxide and the other form of vanadium oxide, the nanoparticles of vanadium oxide having an average diameter from about 5 nm to about 1000 nm.
Claim 2
Dependent Claim
78 words
A process for converting nanoparticles of vanadium oxide to another form of vanadium oxide, the process comprising heating the nanoparticles of vanadium oxide in an oxidizing or inert atmosphere at a temperature between about 60° C. and about 800° C., the temperature being below the melting point of both the nanoparticles of vanadium oxide and the other form of vanadium oxide, the nanoparticles of vanadium oxide having an average diameter from about 5 nm to about 1000 nm.
Claim 3
Dependent Claim
17 words
The process of claim 1 wherein the temperature is between about 60° C. and about 400° C.
Claim 4
Dependent Claim
17 words
The process of claim 1 wherein the temperature is between about 60° C. and about 500° C.
Claim 5
Dependent Claim
14 words
The process of claim 1 wherein the heating is performed in an oxidizing atmosphere.
Claim 6
Dependent Claim
25 words
The process of claim 4 wherein the oxidizing atmosphere comprises between about 1 percent oxidizing gas and about 99 percent oxidizing gas by partial pressure.
Claim 7
Dependent Claim
22 words
The process of claim 4, wherein the oxidizing atmosphere comprises O 2 , O 3 , CO, CO 2 or combinations thereof.
Claim 8
Dependent Claim
12 words
The process of claim 4 wherein the oxidizing atmosphere comprises flowing gas.
Claim 9
Dependent Claim
41 words
The process of claim 1 wherein the nanoparticles of vanadium oxide comprise VO 1 .27, VO 2 , V 2 O 3 , V 3 O 5 , amorphous V 2 O 5 or 2-D crystalline V 2 O 5 .
Claim 10
Dependent Claim
26 words
The process of claim 1 wherein the other forms of vanadium oxide comprise 2-D crystalline V 2 O 5 or crystalline V 2 O 5 .
Claim 11
Dependent Claim
23 words
The process of claim 1 wherein the nanoparticles of vanadium oxide have an average diameter from about 5 nm to about 500 nm.
Claim 12
Dependent Claim
23 words
The process of claim 1 wherein the nanoparticles of vanadium oxide have an average diameter from about 5 nm to about 150 nm.
Claim 13
Dependent Claim
10 words
Vanadium oxide nanoparticles formed by the process of claim 11.
Claim 14
Dependent Claim
10 words
Vanadium oxide nanoparticles formed by the process of claim 1.
Claim 15
Dependent Claim
73 words
A process for forming a powder comprising vanadium oxide particles, the process comprising heating particles of vanadium oxide with a lower oxygen to vanadium ratio than the vanadium oxide particles to be formed in an oxidizing atmosphere at a temperature between about 60° C. and about 800° C., the temperature being below the melting point of both the vanadium oxide particles to be heated and the product vanadium oxide particles to be formed.
Claim 16
Dependent Claim
73 words
A process for forming a powder comprising vanadium oxide particles, the process comprising heating particles of vanadium oxide with a lower oxygen to vanadium ratio than the vanadium oxide particles to be formed in an oxidizing atmosphere at a temperature between about 60° C. and about 800° C., the temperature being below the melting point of both the vanadium oxide particles to be heated and the product vanadium oxide particles to be formed.
Claim 17
Dependent Claim
10 words
Vanadium oxide nanoparticles formed by the process of claim 14.
Claim 18
Dependent Claim
17 words
The process of claim 14 wherein the temperature is between about 60° C. and about 500° C.
Claim 19
Dependent Claim
23 words
The process of claim 14 wherein the oxidizing atmosphere comprises O 1 , O 3 , CO, CO 2 , or combinations thereof.
Claim 20
Dependent Claim
24 words
The process of claim 14 wherein the oxidizing atmosphere comprises from about 1 percent oxidizing gas and 99 percent oxidizing gas by partial pressure.
Claim 21
Dependent Claim
23 words
The process of claim 14 wherein the initial vanadium oxide particles have an average diameter from about 5 nm to about 1000 nm.
Claim 22
Dependent Claim
22 words
The process of claim wherein the initial vanadium oxide particles have an average diameter from about 5 nm to about 150 nm.
Claim 23
Dependent Claim
18 words
The process of claim 14 wherein the product vanadium oxide particles comprise orthorhombic V 2 O 5 crystals.
Claim 24
Dependent Claim
18 words
The process of claim 14 wherein the product vanadium oxide particles comprise 2-D V 2 O 5 crystals.
Claim 25
Dependent Claim
74 words
A process for forming crystalline V 2 O 5 particles, the method comprising heating amorphous V 2 O 5 particles at a temperature between about 60° C. and about 800° C., the temperature being below the melting point of both the amorphous V 2 O 5 particles and the crystalline V 2 O 5 particles, the amorphous V 2 O 5 particles having an average diameter from about 5 nm to about 1000 nm.
Claim 26
Dependent Claim
74 words
A process for forming crystalline V 2 O 5 particles, the method comprising heating amorphous V 2 O 5 particles at a temperature between about 60° C. and about 800° C., the temperature being below the melting point of both the amorphous V 2 O 5 particles and the crystalline V 2 O 5 particles, the amorphous V 2 O 5 particles having an average diameter from about 5 nm to about 1000 nm.
Claim 27
Dependent Claim
10 words
Vanadium oxide nanoparticles formed by the process of claim 23.
Claim 28
Dependent Claim
17 words
The process of claim 23 wherein the temperature is between about 60° C. and about 500° C.
References Cited (Backward Citations)
US1450507A
Cited
US2298091A
Cited
US3305322A
Cited
US3483110A
Cited
US3607005A
Cited
US4035476A
Cited
US4119707A
Cited
US4315905A
Cited
US4436706A
Cited
US4393095A
Cited
US4486400A
Cited
US4619822A
Cited
US4849189A
Cited
US5336830A
Cited
US5258245A
Cited
US5427603A
Cited
US5437943A
Cited
US5326545A
Cited
US5334334A
Cited
US5358801A
Cited
US5589300A
Cited
US5482697A
Cited
US5514496A
Cited
US5549880A
Cited
US5427763A
Cited
US5443809A
Cited
US5545496A
Cited
US5578094A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-11-22 | 2003-05-24 | 2003-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-11-22 | 2007-05-24 | 2007-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-11-22 | 2011-05-24 | 2011-11-23 | $7700.00 | Window Closed / Lapsed |