US 11,685,699 B2
Coating methods and materials to reduce aging of SiC hot surface ignitors
Michael J. Hanagan, Grafton, MA (US); and Al Marshall, Merrimack, NH (US)
Assigned to CoorsTek, Inc., Golden, CO (US)
Filed by Coorstek, Inc., Golden, CO (US)
Filed on Jul. 14, 2020, as Appl. No. 16/928,554.
Claims priority of provisional application 62/874,338, filed on Jul. 15, 2019.
Prior Publication US 2021/0017091 A1, Jan. 21, 2021
Int. Cl. C04B 41/50 (2006.01); C04B 41/52 (2006.01); F23Q 7/22 (2006.01); C04B 35/565 (2006.01); C04B 41/00 (2006.01); C04B 41/87 (2006.01)
CPC C04B 41/5035 (2013.01) [C04B 35/565 (2013.01); C04B 41/009 (2013.01); C04B 41/524 (2013.01); C04B 41/87 (2013.01); F23Q 7/22 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method to apply a silicon dioxide coating to a silicon carbide ignitor, comprising:
coating at least a portion of a silicon carbide material of the silicon carbide ignitor with a silicon dioxide material to produce a silicon carbide ignitor coated with a first layer of the silicon dioxide, wherein the silicon dioxide material is not produced by oxidizing the silicon carbide material of the silicon carbide ignitor; and
drying the first layer of the silicon dioxide material to form a silicon dioxide layer.