US 12,240,787 B2
Preparation method for improving light efficiency and stability of light-storing ceramics
Le Zhang, Xuzhou (CN); Shunshun Yang, Xuzhou (CN); Rui Wang, Xuzhou (CN); Tao Li, Xuzhou (CN); Xiaowen Zhu, Xuzhou (CN); Xinyu Jiang, Xuzhou (CN); Guocan Huang, Xuzhou (CN); Jian Kang, Xuzhou (CN); Bingheng Sun, Xuzhou (CN); Cen Shao, Xuzhou (CN); Tianyuan Zhou, Xuzhou (CN); and Hao Chen, Xuzhou (CN)
Assigned to Jiangsu Normal University, Xuzhou (CN); and Xuzhou All-To Photoelectric Technology Co., LTD, Xuzhou (CN)
Filed by Jiangsu Normal University, Xuzhou (CN); and Xuzhou All-To Photoelectric Technology Co., LTD, Xuzhou (CN)
Filed on Dec. 1, 2021, as Appl. No. 17/539,441.
Application 17/539,441 is a continuation of application No. PCT/CN2019/096257, filed on Jul. 17, 2019.
Claims priority of application No. 201910587378.9 (CN), filed on Jul. 2, 2019.
Prior Publication US 2022/0089499 A1, Mar. 24, 2022
Int. Cl. C04B 35/465 (2006.01); C04B 24/38 (2006.01); C04B 35/624 (2006.01); C04B 103/30 (2006.01)
CPC C04B 35/465 (2013.01) [C04B 24/383 (2013.01); C04B 35/624 (2013.01); C04B 2103/30 (2013.01); C04B 2235/3213 (2013.01); C04B 2235/3222 (2013.01); C04B 2235/3236 (2013.01); C04B 2235/36 (2013.01); C04B 2235/6023 (2013.01); C04B 2235/9646 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A preparation method for improving light efficiency and stability of light-storing ceramics, comprising:
step (1), weighing calcium nitrate and citric acid individually according to a mass ratio of 10:0.5˜1.5, and dissolving the weighed calcium nitrate and the weighed citric acid into an absolute ethanol to form a calcium ethanol solution; weighing tetra-n-butyl titanate, dissolving the weighed tetra-n-butyl titanate into another absolute ethanol, and adding glacial acetic acid dropwise under stirring to form a titanium precursor solution; and under stirring, adding the calcium ethanol solution into the titanium precursor solution, adding oleic acid dispersant and subsequently adding pure water and a light-storing powder, and continuously stirring 1˜4 hours (h) to obtain a light-storing powder-calcium titanate gel;
step (2), heating the light-storing powder-calcium titanate gel obtained by the step (1) at a temperature of 80˜150° C. for 2˜8 h to obtain a light-storing powder xerogel coated with calcium titanate, crushing, and sieving with a sieve of 80˜200 meshes to obtain a sieved xerogel powder;
step (3), placing a glass matrix material, the sieved xerogel powder and a second dispersant into a granulator, mechanically stirring and granulating after adding pure water, adding a plasticizer after the stirring of 4˜8 h, and continuously stirring for 1˜3 h to obtain a mixture; wherein a stirring speed of the stirring in the step (3) is 100˜300 radians per minute (rad/min);
step (4), packing the mixture obtained by the step (3) into a mold, tableting by using an automatic tablet pressor, then demolding to obtain green compacts, and subsequently sending the green compacts to a kiln for drying and firing, wherein a shape of the mold is required by product requirements, pressure is 5˜40 megapascals (MPa), and pressure holding time is 5˜20 seconds(s); and
step (5), heating of the kiln comprising: heating from room temperature to 200° C. with a rate of 2˜5° C./min, and then maintaining for 10˜30 min to ensure complete evaporation of water from the green compacts; then continuing to heat up to 400˜900° C. and maintaining for 60˜120 min; and subsequently cooling down to below 100° C. with the kiln and taking out a finished product to obtain light-storing ceramics.