Remote combustion deposition burner and/or related methods
View Patent ↗Certain example embodiments relate to a burner for use in combustion deposition depositing a coating on a substrate. An infrared (IR) burner generates radiant energy in an area between the burner and the substrate. A delivery device (1) provides a stream comprising a substantially vaporized precursor and a carrier gas from a location remote from the radiant energy generated by the IR burner, and (2) causes the stream to flow between the substrate and the IR burner. The stream is substantially laminar when exiting the delivery device. The radiant energy is sufficient to cause the precursor in the stream to be combusted and to heat the substrate to allow at least a portion of the combusted precursor to form the coating, directly or indirectly, on the substrate. The burners of certain example embodiments may be used, for example, to combustion deposition deposit metal oxide coatings onto glass substrates.
1. A method of forming a coating on a glass substrate using combustion deposition, the method comprising:
providing a glass substrate having at least one surface to be coated;
providing at least one infrared (IR) burner;
providing a substantially laminar flow of a gaseous stream comprising a precursor and a carrier gas, the stream at least initially being provided remote from the IR burner;
causing the stream to pass between the substrate and the at least one IR burner;
combusting, using the at least one IR burner, at least a portion of the precursor in the stream to form a combusted material, the combusted material comprising non-vaporized material; and
providing the glass substrate in an area so that the glass substrate is heated sufficiently to allow the combusted material to form the coating, directly or indirectly, on the glass substrate.
2. The method of claim 1 , wherein the flow of the gaseous stream is substantially uniform during the combusting.
3. The method of claim 1 , wherein the stream is provided via a delivery device comprising a manifold with a slit outlet through which the stream is to pass.
4. The method of claim 1 , wherein the stream is provided via an air knife.
5. The method of claim 3 , further comprising causing the delivery device to oscillate to reduce non-uniformities and/or striping in the coating.
6. The method of claim 1 , further comprising providing the substrate at a distance of about 2-20 mm from the at least one IR burner.
7. The method of claim 1 , further comprising providing IR radiation at a wavelength of about 2.5-3.5 microns to cause the combusting.
8. The method of claim 1 , further comprising providing fuel at an air flow rate of about 75-125 standard liters per minute.
9. The method of claim 1 , wherein baffles at least partially surround a location in which the combusting occurs.
10. A method of making a coated article comprising a coating supported by a glass substrate, the method comprising:
providing a glass substrate having at least one surface to be coated;
providing at least one infrared (IR) burner;
providing a substantially laminar flow of a gaseous stream comprising a precursor and a carrier gas, the stream at least initially being provided remote from the IR burner;
causing the stream to pass between the substrate and the at least one IR burner;
combusting, using the at least one IR burner, at least a portion of the precursor in the stream to form a combusted material, the combusted material comprising non-vaporized material; and
providing the glass substrate in an area so that the glass substrate is heated sufficiently to allow the combusted material to form the coating, directly or indirectly, on the glass substrate.