US 9,809,501 B2
Calcium lanthanoid sulfide powders, methods of making, and ceramic bodies formed therefrom
Shyam S. Bayya, Ashburn, VA (US); Woohong Kim, Lorton, VA (US); Jasbinder S. Sanghera, Ashburn, VA (US); Guillermo R. Villalobos, Springfield, VA (US); and Ishwar D. Aggarwal, Fairfax Station, VA (US)
Assigned to The United States of America, as represented by the Secretary of the Navy, Washington, DC (US)
Filed by Shyam S. Bayya, Ashburn, VA (US); Woohong Kim, Lorton, VA (US); Jasbinder S. Sanghera, Ashburn, VA (US); Guillermo R. Villalobos, Springfield, VA (US); and Ishwar D. Aggarwal, Fairfax Station, VA (US)
Filed on Jan. 21, 2010, as Appl. No. 12/691,075.
Prior Publication US 2011/0174989 A1, Jul. 21, 2011
Int. Cl. C04B 35/51 (2006.01); C04B 35/547 (2006.01); B82Y 30/00 (2011.01); C01F 17/00 (2006.01); C04B 35/626 (2006.01); C04B 35/645 (2006.01)
CPC C04B 35/547 (2013.01) [B82Y 30/00 (2013.01); C01F 17/0037 (2013.01); C04B 35/62665 (2013.01); C04B 35/645 (2013.01); C01P 2002/72 (2013.01); C01P 2004/03 (2013.01); C01P 2004/64 (2013.01); C01P 2006/12 (2013.01); C01P 2006/80 (2013.01); C04B 2235/3208 (2013.01); C04B 2235/3224 (2013.01); C04B 2235/3227 (2013.01); C04B 2235/443 (2013.01); C04B 2235/5409 (2013.01); C04B 2235/5454 (2013.01); C04B 2235/658 (2013.01); C04B 2235/72 (2013.01); C04B 2235/721 (2013.01); C04B 2235/9653 (2013.01); C04B 2235/9661 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of preparing a fine powder of calcium lanthanoid sulfide comprising:
forming a precipitate comprising insoluble calcium and lanthanoid salts by spraying soluble calcium and lanthanoid salts into at least one bath comprising a precipitating solution while simultaneously applying ultrasonic energy to each bath;
oxidizing the precipitate, wherein the oxidizing of the precipitate comprising insoluble soluble calcium and lanthanoid salts is performed at a temperature of less than 900° C.; and
sulfurizing the oxidized precipitate to form a fine powder of calcium lanthanoid sulfide.