US 11,685,683 B2
High-strength geopolymer hollow microsphere, preparation method thereof and phase change energy storage microsphere
Huajie Liu, Qingdao (CN); Yuhuan Bu, Qingdao (CN); Rui Ma, Qingdao (CN); Shenglai Guo, Qingdao (CN); and Longlong An, Qingdao (CN)
Assigned to CHINA UNIVERSITY OF PETROLEUM (EAST CHINA), Qingdao (CN)
Appl. No. 16/485,450
Filed by CHINA UNIVERSITY OF PETROLEUM (EAST CHINA), Qingdao (CN)
PCT Filed May 25, 2018, PCT No. PCT/CN2018/088411
§ 371(c)(1), (2) Date Aug. 13, 2019,
PCT Pub. No. WO2018/233449, PCT Pub. Date Dec. 27, 2018.
Claims priority of application No. 201710473085.9 (CN), filed on Jun. 21, 2017; and application No. 201710952207.2 (CN), filed on Oct. 13, 2017.
Prior Publication US 2020/0002210 A1, Jan. 2, 2020
Int. Cl. C03B 19/10 (2006.01); C03C 11/00 (2006.01); C04B 12/00 (2006.01); C04B 103/00 (2006.01); C04B 20/10 (2006.01); C04B 14/04 (2006.01)
CPC C03B 19/1075 (2013.01) [C03C 11/005 (2013.01); C04B 12/005 (2013.01); C03B 19/107 (2013.01); C04B 14/044 (2013.01); C04B 20/1037 (2013.01); C04B 2103/0071 (2013.01); Y02P 40/10 (2015.11)] 9 Claims
OG exemplary drawing
 
1. A method of preparing high-strength geopolymer hollow microspheres, comprising: dissolving sodium hydroxide (NaOH), sodium silicate (Na2SiO3.9H2O) and a spheroidizing aid in water to form a solution, adding active powder to the solution to obtain a first mixture, stirring and uniformly mixing the first mixture to form a slurry, adding the slurry to an oil phase dispersion medium to obtain a second mixture, stirring the second mixture to disperse the slurry into the oil phase dispersion medium to form balls, after the stirring, filtering the second mixture to obtain geopolymer microspheres, washing the geopolymer microspheres, and then carrying out a high-temperature calcination on the geopolymer microspheres to obtain the high-strength geopolymer hollow microspheres; wherein a mass percentage of the sodium hydroxide (NaOH), the sodium silicate (Na2SiO3.9H2O) and the spheroidizing aid is (10-40%): (20-60%): (20-60%), a mass ratio of the water to the active powder is 1:2-1, the slurry accounts for 5%-50% of a volume of the oil phase dispersion medium, a temperature of the high-temperature calcination is 800-1500° C., and a time of the high-temperature calcination is 1-8 hours.