Patent EP0151490A2 successfully refreshed from Google Patents.
EP0151490A2
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EP
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Process for producing ultra-fine ceramic particles
Assignee: Toyota Motor Corp
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Filing: 1985-02-07
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Granted: —
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Expires: 2005-02-07
Abstract
Abstract A process for producing ultra-fine ceramic particles with the particle size of less than 1000 A, which comprises the steps of forming powdered dust cloud of metal powder such as Si constituting a portion of aimed ceramic particles in a reaction gas containing the other portion of said aimed ceramic particles, igniting said powdered dust cloud to cause explosive burning and synthesizing said aimed ceramic particles and gathering said resulting ceramic particles. By the process, ceramics particles such as Al 2 O 3 , MgO, SiO 2 , TiO 2 , TiN having particle size of 10 - 100 nm can be produced.
Inventors
- 👤 Kazuhide Ota
- 👤 Susumu Abe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 10:11
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/90; B; B01; B01J; B01J3/00; B01J3/06; B01J3/08; B82; B82Y; B82Y30/00; C01B13/00; C01B13/14; C01B13/32; C01B13/322; C01B21/00; C01B21/06; C01B21/076; C01B21/0761; C01B33/00; C01B33/113; C01B33/12; C01B33/18; C01B33/181; C01F; C01F5/00; C01F5/02; C01F5/04; C01F7/00; C01F7/02; C01F7/42; C01F7/422; C01G; C01G23/00; C01G23/04; C01G23/047; C01G25/00; C01G25/02; C01G49/00; C01G49/02; C01B21/0602; C01B21/0612; C01B21/0615; C01B21/0622; C01B21/068; C01B21/072; C01P; C01P2002/00; C01P2002/02; C01P2004/00; C01P2004/30; C01P2004/32; C01P2004/60; C01P2004/62; C01P2004/64; C01P2006/00; C01P2006/10; C01P2006/80
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
66 words
1 . A process for producing ultra-fine ceramic particles which comprises the steps of forming powdered dust cloud composed of metal powder constituting a portion of aimed ultra-fine ceramic particles and a reaction gas containing an element constituting the other portion of said aimed ultra-fine ceramic particles, igniting the same to cause explosive burning and synthesizing the ultra-fine ceramic particles and gathering said ultra-fine ceramic particles.
Claim 2
Dependent Claim
66 words
1 . A process for producing ultra-fine ceramic particles which comprises the steps of forming powdered dust cloud composed of metal powder constituting a portion of aimed ultra-fine ceramic particles and a reaction gas containing an element constituting the other portion of said aimed ultra-fine ceramic particles, igniting the same to cause explosive burning and synthesizing the ultra-fine ceramic particles and gathering said ultra-fine ceramic particles.
Claim 3
Dependent Claim
31 words
A process according to claim 1, wherein the metal forming said metal powder is one selected from the group consisting of silicon, aluminum, titanium, magnesium, zirconium, iron and the mixture thereof.
Claim 4
Dependent Claim
19 words
A process according to claim 1, wherein the particle size of said metal powder is less than 400 µm.
Claim 5
Dependent Claim
25 words
A process according to claim 1, wherein the density of said metal powder in said powdered dust cloud is more than 20 g/m 3 .
Claim 6
Dependent Claim
25 words
A process according to claim 4, wherein the density of said metal powder in said powdered dust cloud is more than 500 g/m 3 .
Claim 7
Dependent Claim
27 words
6 . A process according to claim 5, wherein the density of said metal powder in said powdered dust cloud is more than 1000 g/m 3 .
Claim 8
Dependent Claim
21 words
A process according to claim 1, wherein said element is one selected from the group consisting of oxygen, nitrogen, and carbon.
Claim 9
Dependent Claim
30 words
A process according to claim 1, wherein said reaction gas is one selected from the group consisting of gaseous oxygen, gaseous nitrogen, gaseous ammonium, gaseous hydrocarbon and the mixture thereof.
Claim 10
Dependent Claim
17 words
A process according to claim 1, wherein the step of igniting is carried out by ohmic treating.
Claim 11
Dependent Claim
17 words
A process according 'to claim 1, wherein the step of igniting is carried out by arc discharge.
Claim 12
Dependent Claim
17 words
A process according to claim 1, wherein the step of igniting is carried out by plasma flame.
Claim 13
Dependent Claim
16 words
A process according to claim 1, wherein the step of igniting is carried out by laser.
Claim 14
Dependent Claim
19 words
A process according to claim 1, wherein the step of igniting is carried out by high frequency induction heating.
Claim 15
Dependent Claim
17 words
A process according to claim 1, wherein the step of igniting is carried out by electron beams.
Claim 16
Dependent Claim
54 words
A process for producing ultra-fine oxide particles, which comprises the steps of forming a chemical flame containing gaseous oxygen, feeding metal powder for constituting a portion of aimed ultra-fine oxide particles in said chemical flame to explosively burn said metal powder and to synthesize the ultra-fine oxide particles, and gathering said ultra-fine oxide particles.
Claim 17
Dependent Claim
54 words
A process for producing ultra-fine oxide particles, which comprises the steps of forming a chemical flame containing gaseous oxygen, feeding metal powder for constituting a portion of aimed ultra-fine oxide particles in said chemical flame to explosively burn said metal powder and to synthesize the ultra-fine oxide particles, and gathering said ultra-fine oxide particles.
Claim 18
Dependent Claim
34 words
A process according to claim 15, wherein the step of forming a chemical flame includes filling into a vessel and burning hydrogen in said vessel by a burner to form the resulting chemical flame.
Claim 19
Dependent Claim
31 words
A process according to claim 15, wherein the metal forming said metal powder is one selected from the group consisting of silicon, aluminum, titanium, magnesium, zirconium, iron and the mixture thereof.
Claim 20
Dependent Claim
19 words
A process according to claim 15, wherein the particle size of said metal powder is less than 400 m.
Claim 21
Dependent Claim
27 words
1 9. A process according to claim 15, wherein the density of said metal powder in said powdered dust cloud is more than 20 g/m 3 .
Claim 22
Dependent Claim
25 words
A process according to claim 19, wherein the density of said metal powder in said powdered dust cloud is more than 500 g/m 3 .
Claim 23
Dependent Claim
25 words
A process according to claim 20, wherein the density of said metal powder in said powdered dust cloud is more than 1000 g/m 3 .
References Cited (Backward Citations)
No citation records indexed.
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