US4731153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method to manufacture BaPb1-x BIx O3 single crystal
Assignee: NAKA SHIGEHARU 11-25 KASUMIGAOKA 1-CHOME CHIGUSA-KU NAGOYA AICHI-KEN JAPAN
•
Filing: 1986-03-07
•
Granted: 1988-03-15
•
Expires: 2006-03-07
Abstract
Abstract The present invention is the method of manufacturing BaPb1-xBixO3 single crystal utilized as a super-conductor. In this method, the starting material and the growing substrate are mounted inside an autoclave, in which an aqueous solution comprised of acid, alkali aqueous solution or peroxide is charged. With the hydrothermal synthesis that applies necessary temperature and pressure to the starting material, the BaPb1-xBixO3 single crystal is obtained and the composition reappearance characteristic is improved. The strain is removed by growing at a temperature below the transition point. Also, by removing such defects as heat strain, the crystallization ability and super-conducting are improved.
Inventors
- 👤 Shinichi Hirano
- 👤 Shigeharu Naka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:39
CPC Classifications
C; C30; C30B; C30B29/00; C30B29/10; C30B29/16; C30B29/22; C30B7/00; C30B7/005; Y; Y10; Y10S; Y10S505/00; Y10S505/725; Y10S505/729
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
46 words
A method of manufacturing BaPb 1-x BiO 3 single crystal wherein BaPb 1-x Bi x O 3 is grown by hydrothermal synthesis which applies heat and pressure to the crystal within an aqueous solution, the hydrothermal synthesis being carried out at a temperature above 350° C.
Claim 2
Independent Claim
46 words
A method of manufacturing BaPb 1-x BiO 3 single crystal wherein BaPb 1-x Bi x O 3 is grown by hydrothermal synthesis which applies heat and pressure to the crystal within an aqueous solution, the hydrothermal synthesis being carried out at a temperature above 350° C.
Claim 3
Dependent Claim
14 words
The method according to claim 1; wherein the aqueous solution contains chloride or alkali.
Claim 4
Dependent Claim
13 words
The method according to claim 2; wherein said chloride is Nacl or KCl.
Claim 5
Dependent Claim
11 words
The method according to claim 2; wherein said alkali is NaOH.
Claim 6
Dependent Claim
25 words
The method according to claim 1; wherein the BaPb 1-x Bi x O 3 single crystal is grown as a thin film on a substrate.
Claim 7
Dependent Claim
17 words
The method according to claim 5; wherein the substrate is composed of a SrTiO 3 single crystal.
Claim 8
Dependent Claim
14 words
The method according to claim 1; wherein the aqueous solution comprises chloride and peroxide.
Claim 9
Dependent Claim
16 words
The method according to claim 1; wherein the aqueous solution comprises KCl and KClO 3 .
Claim 10
Dependent Claim
22 words
The method according to claim 1; including quickly cooling the BaPb 1-x Bi x O 3 single crystal after the hydrothermal synthesis.
Claim 11
Independent Claim
64 words
A method of manufacturing BaPb 1-x Bi x O 3 single crystal comprising: providing a starting material comprised of BaCO 3 , PbO 2 and Bi 2 O 3 mixed together in the desired proportions; and hydrothermally synthesizing the starting material within an aqueous solution at a temperature above 350° C. to effect the growth of BaPb 1-x Bi x O 3 single crystal.
Claim 12
Independent Claim
64 words
A method of manufacturing BaPb 1-x Bi x O 3 single crystal comprising: providing a starting material comprised of BaCO 3 , PbO 2 and Bi 2 O 3 mixed together in the desired proportions; and hydrothermally synthesizing the starting material within an aqueous solution at a temperature above 350° C. to effect the growth of BaPb 1-x Bi x O 3 single crystal.
Claim 13
Dependent Claim
14 words
A method according to claim 10; wherein the aqueous solution contains chloride or alkali.
Claim 14
Dependent Claim
13 words
A method according to claim 11; wherein said chloride is Nacl or KCl.
Claim 15
Dependent Claim
11 words
A method according to claim 11; wherein said alkali is NaOH.
Claim 16
Dependent Claim
25 words
A method according to claim 10; wherein the BaPb 1-x Bi x O 3 single crystal is grown as a thin film on a substrate.
Claim 17
Dependent Claim
16 words
A method according to claim 14; wherein the substrate is composed of SrTiO 3 single crystal.
Claim 18
Dependent Claim
14 words
A method according to claim 10; wherein the aqueous solution comprises chloride and peroxide.
Claim 19
Dependent Claim
16 words
A method according to claim 10; wherein the aqueous solution comprises KCl and KClO 3 .
Claim 20
Dependent Claim
23 words
A method according to claim 10; wherein the starting material is hydrothermally synthesized within the aqueous solution at a temperature below 500° C.
References Cited (Backward Citations)
JPS6042298A
Cited
JPS60145997A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-15 | 1991-09-14 | 1992-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-15 | 1995-09-14 | 1996-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-15 | 1999-09-14 | 2000-03-15 | $7700.00 | Window Closed / Lapsed |