Research Article Preparation of Luminescent Glass Aggregates from Soda-Lime Waste Glass Vorrada Loryuenyong and Achanai Buasri Department of Materials Science and Engineering, Faculty of Engineering and Industrial Technology, Silpakorn University, Nakhon Pathom 73000, Thailand Correspondence should be addressed to Vorrada Loryuenyong; vorrada@gmail.com Received 19 July 2021; Revised 8 October 2021; Accepted 25 October 2021; Published 8 November 2021 Academic Editor: Regina De Fátima Peralta Muniz Moreira Copyright © 2021 Vorrada Loryuenyong and Achanai Buasri. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. This research studied the preparation of luminescent glass aggregates prepared from soda-lime waste glass and strontium aluminate-based phosphors. The properties of the samples were determined by means of X-ray diffraction (XRD) technique, scanning electron microscopy (SEM), Archimedes’ method, and photoluminescence (PL) spectroscopy. It was found that the pore characteristics, density, and formation of crystallite phases in the glassy matrix depended on the phosphor content. The addition of fine phosphor powder tended to inhibit the glass crystallization and to reduce the apparent porosity of the aggregates. In general, the disadvantage of phosphors is their luminescent degradation under thermal attacks, which limits their use in applications involving high-temperature annealing. The phosphors, however, still had good luminescent properties and long-term stability with the sintering temperature as high as 750 ° C. The results indicated that the phosphors could be composited with glasses at high processing temperatures, enabling their widespread application. 1. Introduction Glass is a very common material in our daily life. We have used glass in numerous applications including packaging for products, tableware, and construction. As a result, a million tons of glass waste have been generated annually. To conserve raw material resources, glass waste is usually recycled either by being remelted into glass products or reprocessed in various applications. For example, Bernardo et al. used glass waste to replace feldspar sand in the fab- rication of glass ceramic stoneware [1]. The resultant products had high strength and high fracture toughness similar to those of conventional stoneware but required lower sintering temperatures. In addition, the use of glass waste also reduced the production costs of glass ceramics by reducing processing steps involving nucleation and crystal growth mechanisms [2]. Phosphors are materials that can emit intense and long- lasting light when absorbing high external energy. They are widely used in many applications such as lighting and dis- play devices [3, 4]. Other applications include the use of glow-in-the-dark materials dispersed in self-luminescent cement-based composites [5]. The addition of particular types of phosphors such as strontium aluminate could pro- vide long-lasting luminescence to the cement products. Despite this, it has been reported that the presence of phos- phor powder could promote the hydration reaction of non- hydrated particles in cement, which enhanced the mechanical properties of the final products [5]. Phosphors could also be composited with other mate- rials such as glasses [6], metals [7], or polymers [8] for energy-saving applications. The luminescence occurs when phosphors absorb the solar light during the day and illumi- nate at night. Although many applications of phosphor com- posites have been designed and commercially available, they normally suffer from thermal degradation when sintering at high temperatures [9, 10]. This causes inferior luminescence and limits their use with high-temperature processing mate- rials. Glass ceramics are materials with at least one crystal- line phase dispersed in the glass. They are normally formed by the controlled crystallization of the glass. These materials have attracted tremendous attention due to their Hindawi International Journal of Photoenergy Volume 2021, Article ID 5951258, 6 pages https://doi.org/10.1155/2021/5951258