US4970095A
Expired / Lapsed
US
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Method for coating substrates with boron nitride
Assignee: EIDP Inc
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Filing: 1988-12-30
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Granted: 1990-11-13
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Expires: 2008-12-30
Abstract
Abstract A method of producing coatings of boron nitride on substrates by the application of solutions containing boron compounds.
Inventors
- 👤 John D. Bolt
- 👤 Frederick N. Tebbe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:56
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/4584; C04B41/50; C04B41/5053; C04B41/5062; C04B41/5064; C04B41/80; C04B41/81; C04B41/85; C04B41/87; D; D01; D01F; D01F11/00; D01F11/10; D01F11/12; D01F11/124
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
113 words
A method of producing a coating of boron nitride on a substrate comprising the steps of: (a) applying to the substrate a solution containing a boron salt selected from the following structures: M.sub.2/n B.sub.12 H.sub.12-x S.sub.x and M.sub.2/n B.sub.10 H.sub.10-x S.sub.x wherein: x is 0-6; S is selected from the group consisting of NO 2 , F, Cl, Br, I, HOCH 2 , OH, C 6 H 5 CO and (CH 3 ) 3 C; M is any cation of valence n where n is 1 or 2 in a solvent; (b) heating the coated substrate to a temperature of from about 800° C. to about 1500° C., in the presence of ammonia.
Claim 2
Independent Claim
113 words
A method of producing a coating of boron nitride on a substrate comprising the steps of: (a) applying to the substrate a solution containing a boron salt selected from the following structures: M.sub.2/n B.sub.12 H.sub.12-x S.sub.x and M.sub.2/n B.sub.10 H.sub.10-x S.sub.x wherein: x is 0-6; S is selected from the group consisting of NO 2 , F, Cl, Br, I, HOCH 2 , OH, C 6 H 5 CO and (CH 3 ) 3 C; M is any cation of valence n where n is 1 or 2 in a solvent; (b) heating the coated substrate to a temperature of from about 800° C. to about 1500° C., in the presence of ammonia.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein the concentration of the boron salt in solution ranges from 0.02 wt % to 35 wt %.
Claim 4
Dependent Claim
21 words
The method of claim 2 wherein the concentration of the boron salt is between 0.5 wt % to 3 wt %.
Claim 5
Dependent Claim
15 words
The method of claim 1 wherein a water soluble polymer is included in the solution.
Claim 6
Dependent Claim
21 words
The method of claim 4 wherein the concentration of polymer in solution is from 0.05 wt % to 10 wt %.
Claim 7
Dependent Claim
30 words
The method of claim 5 wherein the water soluble polymer is selected from the group consisting of polyethylene oxide polymers having a molecular weight range of from 500 to 5,000,000.
Claim 8
Dependent Claim
30 words
The method of claim 6 wherein the water soluble polymer is selected from the group consisting of polyethylene oxide polymers having a molecular weight range of from 20,000 to 500,000.
Claim 9
Dependent Claim
34 words
The method of claim 1 where M is selected from H 3 O + , NH 4 + and NR 4 + , where R is C y H 2y+1 where y=1 to 10.
Claim 10
Dependent Claim
21 words
The method of claim 1 in which the heat is applied for a period of from 1 minute to 100 minutes.
Claim 11
Dependent Claim
31 words
The method of claim 1 or claim 4 wherein the solvent is chosen from the group consisting of water, a polar organic solvent and a water and polar organic solvent mixture.
Claim 12
Dependent Claim
17 words
The method of claim 10 in which the polar organic solvent is chosen from ethanol and methanol.
Claim 13
Dependent Claim
10 words
The method of claim 1 containing a water soluble polymer.
Claim 14
Dependent Claim
85 words
A solution for producing coatings of boron nitride on suitable substrates consisting of boron salts of the following formulas: M.sub.2/n B.sub.12 H.sub.12-x S.sub.x and M.sub.2/n B.sub.10 H.sub.10-x S.sub.x wherein: x is 0-6; S is selected from the group consisting of NO 2 , F, Cl, Br, I, HOCH 2 , OH, C 6 H 5 CO and (CH 3 ) 3 C; M is any cation of valence n where n is 1 or 2; and a polar organic solvent chosen from methanol and ethanol.
Claim 15
Dependent Claim
85 words
A solution for producing coatings of boron nitride on suitable substrates consisting of boron salts of the following formulas: M.sub.2/n B.sub.12 H.sub.12-x S.sub.x and M.sub.2/n B.sub.10 H.sub.10-x S.sub.x wherein: x is 0-6; S is selected from the group consisting of NO 2 , F, Cl, Br, I, HOCH 2 , OH, C 6 H 5 CO and (CH 3 ) 3 C; M is any cation of valence n where n is 1 or 2; and a polar organic solvent chosen from methanol and ethanol.
Claim 16
Dependent Claim
98 words
A solution for producing coatings of boron nitride on substrates consisting of boron salts of the following formulas: M.sub.2/n B.sub.12 H.sub.12-x S.sub.x and M.sub.2/n B.sub.10 H.sub.10-x S.sub.x wherein: x is 0-6; S is selected from the group consisting of NO 2 , F, Cl, Br, I, HOCH 2 , OH, C 6 H 5 CO and (CH 3 ) 3 C; M is any cation of valence n, where n is 1 or 2 and, a water soluble polymer chosen from the group consisting of polyethylene oxide polymers having molecular weights of 500 to 5,000,000, in a solvent.
Claim 17
Dependent Claim
98 words
A solution for producing coatings of boron nitride on substrates consisting of boron salts of the following formulas: M.sub.2/n B.sub.12 H.sub.12-x S.sub.x and M.sub.2/n B.sub.10 H.sub.10-x S.sub.x wherein: x is 0-6; S is selected from the group consisting of NO 2 , F, Cl, Br, I, HOCH 2 , OH, C 6 H 5 CO and (CH 3 ) 3 C; M is any cation of valence n, where n is 1 or 2 and, a water soluble polymer chosen from the group consisting of polyethylene oxide polymers having molecular weights of 500 to 5,000,000, in a solvent.
Claim 18
Dependent Claim
110 words
A solution for producing coatings of boron nitride on substrates, consisting of boron salts of the following formulas: M.sub.2/n B.sub.12 H.sub.12-x S.sub.x and M.sub.2/n B.sub.10 H.sub.10-x S.sub.x wherein: x is 0-6; S is selected from the group consisting of NO 2 , F, Cl, Br, I, HOCH 2 , OH, C 6 H 5 CO and (CH 3 ) 3 C; M is a cation selected from H 3 O + , NH 4 + and NR 4 + where R=CyH 2y+1 , y=1 to 10; and, a water soluble polymer chosen from the group consisting of polyethylene oxide polymers having molecular weights of 500 to 5,000,000, in a solvent.
Claim 19
Dependent Claim
110 words
A solution for producing coatings of boron nitride on substrates, consisting of boron salts of the following formulas: M.sub.2/n B.sub.12 H.sub.12-x S.sub.x and M.sub.2/n B.sub.10 H.sub.10-x S.sub.x wherein: x is 0-6; S is selected from the group consisting of NO 2 , F, Cl, Br, I, HOCH 2 , OH, C 6 H 5 CO and (CH 3 ) 3 C; M is a cation selected from H 3 O + , NH 4 + and NR 4 + where R=CyH 2y+1 , y=1 to 10; and, a water soluble polymer chosen from the group consisting of polyethylene oxide polymers having molecular weights of 500 to 5,000,000, in a solvent.
Claim 20
Dependent Claim
21 words
The method of claim 1 wherein the substrate to be coated is chosen from the group consisting of inorganic ceramic fibers.
Claim 21
Dependent Claim
50 words
The method of claim 16 wherein the inorganic ceramic fibers are chosen from the group consisting of B 4 C, B, C (graphite), ZrO 2 , HfO 2 , TiO 2 , Al 2 O 3 , AlN, SiC, Si 3 N 4 , SiO 2 (quartz) and mixtures thereof.
Claim 22
Dependent Claim
19 words
The method of claim 1 wherein the heating in ammonia step is done in the presence of inert gases.
Claim 23
Dependent Claim
10 words
The solution of claim 13 containing a water soluble polymer.
Claim 24
Dependent Claim
31 words
The solution of claim 13 where M is selected from H 3 O + , NH 4 + and NR 4 + where R=C y H 2y+1 , y=1 to 10.
Claim 25
Dependent Claim
31 words
The solution of claim 14 where M is selected from H 3 O + , NH 4 + and NR 4 + where R=C y H 2y+1 , y=1 to 10.
Claim 26
Dependent Claim
31 words
The solution of claim 15 where M is selected from H 3 O + , NH 4 + and NR 4 + where R=C y H 2y+1 , y=1 to 10.
References Cited (Backward Citations)
US4642271A
Cited
US4762729A
Cited
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