Patent US3884697A successfully refreshed from Google Patents.
US5000760A
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CBN abrasive-grains, method for producing the same, and grinding wheel
Assignee: Resonac Holdings Corp
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Filing: 1989-07-21
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Granted: 1991-03-19
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Expires: 2009-07-21
Abstract
Abstract CBN abrasive grains contain 0.01% by weight or more of Si and, the majority of the surfaces of its grains consist of {111} planes. In the method for producing CBN abrasive grains, a C source, an Si source, and at least one member selected from the group consisting of alkali hydride, alkali-earth hydride, and a synthetizing catalyst of CBN which may be the alkali hydride and alkali-earth hydride, are mixed together with HBN and are subjected to the treatment.
Inventors
- 👤 Hirohiko Ohtsubo
- 👤 Masakazu Maki
- 👤 Eiichi Iizuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:39
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/06; C01B21/064; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/583; C04B35/5831; B; B01; B01J; B01J3/00; B01J3/06; C09; C09K; C09K3/00; C09K3/14; C09K3/1436
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
84 words
A method for producing CBN particles comprising treating HBN under a high temperature and high pressure condition, wherein the method comprises mixing a C source, an Si source, and at least one member selected from the group consisting of an alkali metal hydride and an alkaline-earth metal hydride, as well as a synthesizing catalyst of CBN which may be the alkali metal hydride or the alkaline-earth metal hydride, together with said HBN and subjecting said mixture to the high temperature and high pressure treatment.
Claim 2
Independent Claim
84 words
A method for producing CBN particles comprising treating HBN under a high temperature and high pressure condition, wherein the method comprises mixing a C source, an Si source, and at least one member selected from the group consisting of an alkali metal hydride and an alkaline-earth metal hydride, as well as a synthesizing catalyst of CBN which may be the alkali metal hydride or the alkaline-earth metal hydride, together with said HBN and subjecting said mixture to the high temperature and high pressure treatment.
Claim 3
Independent Claim
68 words
A method for producing CBN particles comprising treating HBN under a high temperature and high pressure condition, wherein the method comprises mixing a C source, an Si source, an alkali metal hydride or alkaline-earth metal hydride, and a synthesizing catalyst of CBN other than said alkali metal hydride or alkaline-earth metal hydride, together with said HBN and subjecting said mixture to the high temperature and high pressure treatment.
Claim 4
Independent Claim
68 words
A method for producing CBN particles comprising treating HBN under a high temperature and high pressure condition, wherein the method comprises mixing a C source, an Si source, an alkali metal hydride or alkaline-earth metal hydride, and a synthesizing catalyst of CBN other than said alkali metal hydride or alkaline-earth metal hydride, together with said HBN and subjecting said mixture to the high temperature and high pressure treatment.
Claim 5
Independent Claim
77 words
A method for producing CBN particles comprising treating HBN under a high temperature and high pressure condition, wherein the method comprises mixing a C source, an Si source, and one member selected from the group consisting of an alkali metal hydride, an alkaline-earth metal hydride, and a synthesizing catalyst of CBN other than said alkali metal hydride and said alkaline-earth metal hydride, with said HBN and subjecting said mixture to the high temperature and high pressure treatment.
Claim 6
Independent Claim
77 words
A method for producing CBN particles comprising treating HBN under a high temperature and high pressure condition, wherein the method comprises mixing a C source, an Si source, and one member selected from the group consisting of an alkali metal hydride, an alkaline-earth metal hydride, and a synthesizing catalyst of CBN other than said alkali metal hydride and said alkaline-earth metal hydride, with said HBN and subjecting said mixture to the high temperature and high pressure treatment.
Claim 7
Independent Claim
70 words
A method for producing CBN particles, comprising treating HBN under a high temperature and high pressure condition, wherein the method comprises mixing a C source, an Si source, one or both of a member selected from the group consisting of an alkali metal hydride and an alkaline-earth metal hydride, and a synthesizing catalyst of CBN with said HBN and subjecting said mixture to the high pressure and high temperature treatment.
Claim 8
Independent Claim
70 words
A method for producing CBN particles, comprising treating HBN under a high temperature and high pressure condition, wherein the method comprises mixing a C source, an Si source, one or both of a member selected from the group consisting of an alkali metal hydride and an alkaline-earth metal hydride, and a synthesizing catalyst of CBN with said HBN and subjecting said mixture to the high pressure and high temperature treatment.
Claim 9
Independent Claim
54 words
A method for producing CBN particles comprising treating HBN under a high temperature and high pressure condition, wherein the method comprises mixing an Si source, an alkali metal hydride or alkaline-earth metal hydride, and a synthesizing catalyst of CBN with said HBN and subjecting said mixture to the high pressure and high temperature treatment.
Claim 10
Independent Claim
54 words
A method for producing CBN particles comprising treating HBN under a high temperature and high pressure condition, wherein the method comprises mixing an Si source, an alkali metal hydride or alkaline-earth metal hydride, and a synthesizing catalyst of CBN with said HBN and subjecting said mixture to the high pressure and high temperature treatment.
Claim 11
Dependent Claim
17 words
A method according to claim 1 or 2, wherein said HBN has of 95 % or more.
Claim 12
Dependent Claim
19 words
A method according to claim 3, 4 or 5, wherein said HBN has a purity of 95% or more.
Claim 13
Dependent Claim
36 words
A method according to claim 1 or 2, wherein said C source is at least one member selected from the group consisting of fatty acids, hydrocarbons, nitrogen-containing organic compounds, graphite, carbon black or B 4 C.
Claim 14
Dependent Claim
37 words
A method according to claim 4, 5 or 6, wherein said C source is at least one member selected from the group consisting of fatty acids, hydrocarbons, nitrogen-containing organic compounds, graphite, carbon black or B 4 C.
Claim 15
Dependent Claim
28 words
A method according to claim 8, wherein the amount of said carbon source used is from 0.01 to 15 % relative to the total weight of the mixture.
Claim 16
Dependent Claim
27 words
A method according to claim 9, wherein the amount of said carbon source used is from 0.01to 15 % relative to the total weight of the mixture.
Claim 17
Dependent Claim
43 words
A method according to claim 1 or 2, wherein said Si source is at least one member selected from the group consisting of B 4 Si, Si 3 N 4 , and Si which may be contained in the synthesizing catalyst of CBN.
Claim 18
Dependent Claim
44 words
A method according to claim 4, 5 or 6, wherein said Si source is at least one member selected from the group consisting of B 4 Si, Si 3 N 4 , and Si which may be contained in the synthesizing catalyst of CBN.
Claim 19
Dependent Claim
28 words
A method according to claim 12, wherein the amount of said Si source is from 10 -5 to 10 -2 mol relative to 1 mol of said HBN.
Claim 20
Dependent Claim
28 words
A method according to claim 13, wherein the amount of said Si source is from 10 -5 to 10 -2 mol relative to 1 mol of said HBN.
Claim 21
Dependent Claim
25 words
A method according to claim 1 or 2, wherein said alkali metal hydride is selected from the group consisting of lithium hydride and sodium hydride.
Claim 22
Dependent Claim
26 words
A method according to claim 3, 4 or 5, wherein said alkali metal hydride is selected from the group consisting of lithium hydride and sodium hydride.
Claim 23
Dependent Claim
27 words
A method according to claim 16, wherein the amount of said alkali metal hydride is from 0.1 to 10% relative to the total weight of the mixture.
Claim 24
Dependent Claim
26 words
A method according to claim 17, wherein the amount of said alkali hydride is from 0.1 to 10% relative to the total weight of the mixture.
Claim 25
Dependent Claim
26 words
A method according to claim 1 or 2, wherein said alkaline metal earth hydride is selected from the group consisting of calcium hydride and strontium hydride.
Claim 26
Dependent Claim
27 words
A method according to claim 3, 4 or 5, wherein said alkaline earth metal hydride is selected from the group consisting of calcium hydride and strontium hydride.
Claim 27
Dependent Claim
28 words
A method according to claim 20, wherein, the amount of said alkaline earth metal hydride is from 0.1 to 10% relative to the total weight of the mixture.
Claim 28
Dependent Claim
28 words
A method according to claim 21, wherein, the amount of said alkaline earth metal hydride is from 0.1 to 10% relative to the total weight of the mixture.
Claim 29
Dependent Claim
15 words
A method according to claim 1 or 2, wherein the mixture further contains an N-source.
Claim 30
Dependent Claim
16 words
A method according to claim 3, 4 or 5, wherein the mixture further contains an N-source.
Claim 31
Dependent Claim
23 words
A method according to claim 24, wherein said N-source is at least one member selected from the group consisting of melamine and urea.
Claim 32
Dependent Claim
21 words
A method according to claim 26, wherein the amount of said N-source is from 0.01 to 10 parts of the mixture.
Claim 33
Dependent Claim
21 words
A method according to claim 24, wherein the amount of said N-source is from 0.01 to 10 parts of the mixture.
Claim 34
Dependent Claim
21 words
A method according to claim 26, wherein the amount of said N-source is from 0.01 to 10 parts of the mixture.
Claim 35
Dependent Claim
22 words
A grinding wheel according to claim 28, wherein the CBN abrasive grains are coated with Ni and are bonded by a resin.
References Cited (Backward Citations)
US4259090A
Cited
US4518659A
Cited
JPS59199514A
Cited
US4512946A
Cited
US4515746A
Cited
US4539141A
Cited
JPS6117405A
Cited
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