# US 12,000,050 B2 · Dielectric coating

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- Number: US 12,000,050 B2
- Document ID: US12000050B2
- Status: Granted
- Kind: B2
- Application number: 17/910,867
- Filed: 2021-03-16
- Published: 2023-04-13
- Granted: 2024-06-04
- Earliest claimed: 2020-03-18
- Assignees: ArcelorMittal
- Applicants: ArcelorMittal
- Inventors: Sébastien Le Craz
- Web page: https://patentgrep.com/patent/US12000050B2

## CPC

- C23C 18/122: {Inorganic polymers, e.g. silanes, polysilazanes, polysiloxanes}
- C09D 183/04: Polysiloxanes
- C23C 18/1241: {Metallic substrates}
- C23C 18/1254: {Sol or sol-gel processing}
- C23C 18/127: {Preformed particles}
- H10F 77/169: Thin semiconductor films on metallic or insulating substrates
- H10F 77/1699: {the films including Group I-III-VI materials, e.g. CIS or CIGS on metal foils or polymer foils}
- H10F 77/211: {for photovoltaic cells}
- H10F 77/311: {for photovoltaic cells}
- Y02E 10/541: CuInSe2 material PV cells
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04)
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A sol composition for producing dielectric layers on a metallic substrate including 10 to 30%, by weight of the sol composition, of a precursor including a trialkoxysilane, 10 to 40%, by weight of the sol composition, of titanium dioxide particles whose median size is below 500 nm, 4.5 to 36%, by weight of the sol composition, of silica particles whose particle size distribution D90 is below 100 nm, 5 to 15%, by weight of the sol composition, of a solvent capable of making the precursor miscible in water, 0.1 to 2%, by weight of the sol composition, of an acidic catalyst, the remainder being water.

## Claims

### Claim 1

A sol composition for producing dielectric layers on a metallic substrate comprising:
to 30%, by weight of the sol composition, of a precursor including a trialkoxysilane;
to 40%, by weight of the sol composition, of titanium dioxide particles whose median size is below 500 nm;
4.5 to 36%, by weight of the sol composition, of silica particles whose particle size distribution D90 is below 100 nm;
to 15%, by weight of the sol composition, of a solvent capable of making the precursor miscible in water; and
to 2%, by weight of the sol composition, of an acidic catalyst;
a remainder being water.

### Claim 2 (depends on 1)

The sol composition as recited in claim 1 wherein the trialkoxysilane is chosen from the group consisting of methyltrialkoxysilanes, ethyltrialkoxysilanes and propyltrialkoxysilanes.

### Claim 3 (depends on 1)

The sol composition as recited in claim 1 wherein the precursor is a mixture of at least one tetraalkoxysilane and at least one trialkoxysilane.

### Claim 4 (depends on 1)

The sol composition as recited in claim 1 wherein the content of the precursor is comprised between 15 to 25% by weight of the sol composition.

### Claim 5 (depends on 1)

The sol composition as recited in claim 1 wherein the solvent is chosen from the group consisting of alcohols, ketones and mixtures thereof.

### Claim 6 (depends on 1)

The sol composition as recited in claim 1 wherein the size of the titanium dioxide particles is comprised between 200 and 1000 nm.

### Claim 7 (depends on 1)

The sol composition as recited in claim 1 wherein the titanium dioxide particles are coated with 2 to 6% of alumina by weight of TiO2 particles.

### Claim 8 (depends on 1)

The sol composition as recited in claim 1 wherein the silica particles are in the form of a mix of silica particles of two different size ranges: a first range between 50 and 120 nm and a second range between 3 and 25 nm.