|Table of Contents|

Influence mechanism of properties of strontium aluminate micropowder based on inorganic coating technology(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2026年01期
Page:
66-77
Research Field:
道路工程
Publishing date:

Info

Title:
Influence mechanism of properties of strontium aluminate micropowder based on inorganic coating technology
Author(s):
HE Yin-zhang1;  YANG Ze-yu1;  LI Rui1*;  WANG Ling2;  ZHANG Jiu-peng1;  PEI Jian-zhong1
(1. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 2. School of Mechanical and Electrical Engineering, Hefei Technology College, Hefei 230012, Anhui, China)
Keywords:
road engineering;  road marking;  luminescent marking;  strontium aluminate micropowder;  inorganic coating;  water resistance
PACS:
U417.9
DOI:
10.19721/j.cnki.1671-8879.2026.01.005
Abstract:
To mitigate the hydrolysis induced deterioration of strontium aluminate(SrAl2O3:Eu2+,Dy3+)micropowder used in energy-storing luminescent marking coatings, starting from the inorganic coating process, a low cost, durable, and optically transparent nanosilica was selected to coating the strontium aluminate micropowder, and two silica sources, namely tetraethyl orthosilicate(TEOS)and sodium silicate nonahydrate(Na2SiO3·9H2O)were used to conduct the inorganic silica film coating scheme investigation. The effects of two coating schemes on the water resistance of strontium aluminate micropowder were investigated from the perspectives of coating temperature, coating time, and coating amount. The optimal preparation processes for the two schemes were identified. On this basis, the inorganic coated strontium aluminate micropowders were prepared with two silica sources, and the macroscopic water resistance tests and microscopic characterizations were conducted on the two products. For the dispersion issue of strontium aluminate micropowders in water-based coatings under different coating schemes, the oil absorption test method was adopted to studied the organic compatibilities of strontium aluminate micropowders before and after coating. The research results show that the optimal coating temperatures, coating times, and coating amounts for TEOS and Na2SiO3·9H2O are 70 ℃, 3 h, 3% and 80 ℃, 3 h, 4%, respectively. When using the TEOS coating scheme, the water resistance of strontium aluminate micropowder is better, with improvements of 30.64% and 2.42% compared to uncoated and Na2SiO3·9H2O coating schemes, respectively. Both the coating schemes preserve the crystal structure of strontium aluminate micropowder and maintain the phase stability. The inorganic silica film coated by TEOS has a denser surface and better temperature stability. The inorganic silicon film on the strontium aluminate micropowder surface after coating affects the luminescence performance and compatibility in organic solvents, but it does not affect the normal use. The dispersants are recommended to added in actual marking preparation to avoid the agglomeration of strontium aluminate micropowder. Taking into cost, process and performance comprehensively, the TEOS coating scheme is preferred.2 tabs, 17 figs, 30 refs.

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Last Update: 2026-02-20