An object of the present invention is to provide a lead-freebismuth glass wherein decrease of the degree of accuracy of the patterning is prevented.
本发明的目的是提供能防止图案化精确度下降的无铅的铋玻璃。
2
Also it introduces the features of BNT (Sodium bismuth titanate lead-free) replaced for traditional Piezoelectric ceramic speaker material (PZT) at last.