Tegdma

Bis-GMA, ethyl-4-dimethylaminobenzoate (4-EDMAB), camphorquinone (CQ), and 3-methacryloxypropyltrimet hoxysilane (γ-MPS) were provided by Sigma-Aldrich (St. Louis, MO, USA). TEGDMA (95%) was purchased from Tokyo Chemical Industry (Tokyo, Japan). Microsized SiO 2 particles (average diameters: 50 nm and 1 µm) were supplied by Meryer Chemical Technology (Shanghai, China). Microsized YAG (Y 3Al5O12) particles with an average diameter of 500 nm were provided by Buwei Technology (Shanghai, China). Methods 1. Silanization of nanoparticles YAG powder was dried at 100°C in a vacuum oven overnight. Ten grams of the dried YAG powder and 500 mL of deionized water were added to a 1,000-mL round bottom flask and ultrasonicated for 10 min. Afterwards, 1.1 mL γ-MPS was added to the mixture, and its pH was adjusted to 8.5 by ammonia solution. The obtained mixture was magnetically stirred at a speed of 500 r/min and temperature of 26°C for 2 h and then at 100°C for additional 2 h. YAG was filtered and dried using a circulating water vacuum pump. During the filtration process, it was washed thrice with deionized water and twice with anhydrous ethanol. Finally, the obtained powder was dried at 80°C in a vacuum oven overnight. Microsized SiO 2 particles were modified by the same method.