Environmental-friendly microsphere glass with high refractive index and preparation method thereof

The invention discloses environmental-friendly microsphere glass with high refractive index and a preparation method thereof, wherein the microsphere glass comprises the following raw material components in percentage by weight: 33-53% of TiO2, 30-53% of BaO, 1-8% of SiO2, 0-10% of ZrO2, 0.5-3% of CaO, 1-5% of SrO, 0-3% of TeO2, 0-5% of WO3, 0-2% of Nb2O5, 0-1% of La2O3, and 1-2% of Bi2O3; and the preparation method comprises the steps of: evenly mixing the raw material components; melting and homogenizing the components in a platinum crucible or a refractory matter tank furnace at a temperature of 1380-1480 DEG C; carrying out quenching after the melting, crushing to the particle size of 20-90mum and adopting a flame spraying method to manufacture the product. The microsphere glass provided by the invention can be produced in large scale by adopting the platinum crucible and the refractory matter tank furnace, does not include hazardous elements, and has the advantages of lower cost and favorable crystalliza