Nano microcrystalline dielectric glass and preparation method thereof

The invention provides nano microcrystalline dielectric glass. The nano microcrystalline dielectric glass is prepared from the following components in parts by molecular fraction: 30-65 parts of SiO2, 5-15 parts of B2O3, 1-20 parts of Nb2O5, and 5-12 parts of alkali metal oxide. The nano microcrystalline dielectric glass contains Nb2O5 nanocrystalline and the obtained nanocrystalline particles are even in size, and therefore, the matrix structure of the obtained microcrystalline dielectric glass is changed and the ion transport is reduced under the crystal boundary barrier effect; as a result, the obtained microcrystalline dielectric glass has a relatively low dielectric constant and conforms to the requirement of a PCB dielectric layer on the dielectric constant of the microcrystalline dielectric glass in the prior art; furthermore, the technical problems of signal delay and power loss increase of the PCB dielectric layer in the prior art are solved.