High transparency silica-titania glass beads are characterized by a linear transmittance of at least 70% as measured at a wavelength of 900 nm to 600 nm by a specific measurement method. Such beads are prepared by hydrolyzing and polycondensing a silicon alkoxide and a titanium alkoxide to form a silica-titania sol, converting the sol into a dry gel, and then grinding the gel followed by heating or heating the gel followed by grinding. A light transmission epoxy resin composition comprising a curable epoxy resin, a curing agent, and the high transparency silica-titania glass beads has crack resistance and high transparency in cured state. It is useful in encapsulating optical semiconductor devices.
                            高透明度
硅钛玻璃珠的特点是,通过特定的测量方法,在波长为 900 纳米至 600 纳米时,线性透射率至少为 70%。这种微珠的制备方法是:将
硅烷氧基化合物和
钛烷氧基化合物
水解和缩聚形成
硅钛溶胶,将溶胶转化为干凝胶,然后研磨凝胶并加热或加热凝胶并研磨。由可固化环氧
树脂、固化剂和高透明度
硅钛玻璃微珠组成的透光环氧
树脂组合物在固化状态下具有抗裂性和高透明度。它可用于封装光学半导体器件。