To improve the reflectance of white dielectrics,titania has been used commercially as a filler in a glass matrix despite its high dielectric constant.However,calcite has some advantages over titania as a filler,such as its low dielectric constant and the low price of the raw material.We fabricated composites with titania and calcite as the filler in a B_2O_3-ZnO-BaO-P_2O_5 (BZBP) glass matrix and investigated their dielectric constants and reflectances with an LCR meter and UV-visible spectrometer,respectively.The reflectance of the composites containing calcite and titania as a filler in the BZBP glass was approximately 80%.However,the dielectric constant varied significantly with the filler (titania:10.82±0.45,calcite:3.75±0.06).From our results, we conclude that it is possible to develop a profitable and highly efficient white dielectric using calcite as a filler for plasma display panels. To improve the reflectance of white dielectrics, titania has been used commercially as a filler in a glass matrix despite its high dielectric constant. Despite, calcite has some advantages over titania as a filler, such as its low dielectric constant and the low price of the raw material. We fabricated composites with titania and calcite as the filler in a B 2 O 3-ZnO-BaO-P 2 O 5 (BZBP) glass matrix and investigated their dielectric constants and reflectances with an LCR meter and UV-visible spectrometer, respectively. composites containing calcite and titania as a filler in the BZBP glass were approximately 80%. Host, the dielectric constant varied significantly with the filler (titania: 10.82 ± 0.45, calcite: 3.75 ± 0.06) .From our results, we conclude that it is possible to develop a profitable and highly efficient white dielectric using calcite as a filler for plasma display panels.