(1–x)SiO₂–xBPO₄ (x = 23–70 wt%) glass-fluxed ceramics have been prepared by a traditional ceramic process. The phase assemblage, sintering, crystallization behavior, microwave dielectric properties and chemical compatibility with Ag/Cu have been studied. The SiO₂-rich compositions (x = 23–50 wt%) could be well densified at ∼975 °C/2 h, while the BPO₄-rich compositions demonstrated poor sinterability and porous microstructure. The SiO₂-rich compositions sintered at 975 °C/2 h contained BPO₄, low temperature cristobalite and glassy phases. Crystallization of BPO₄ occurred at lower temperature than that of SiO₂. Good combined microwave dielectric properties with Ɛ_r= ∼5, Q × f = 25,000 GHz and τ_f value of –7.3 ppm/°C could be obtained when 10 wt% TiO₂ was added after sintering at 975 °C/2 h. The x = 23 wt% composition chemically reacted with Ag, but exhibited good chemical compatibility with Cu after sintering at 975 °C/2 h.

（1-x）SiO ₂ -xBPO ₄（x = 23-70 wt％）玻璃助熔陶瓷是通过传统的陶瓷工艺制备的。研究了相组装，烧结，结晶行为，微波介电性能以及与Ag / Cu的化学相容性。富含SiO _2的组合物（x = 23–50 wt％）可以在〜975°C / 2 h时被很好地致密，而富含BPO _4的组合物表现出较差的烧结性和多孔微结构。在975°C / 2 h下烧结的富含SiO _2的组合物包含BPO ₄，低温方石英和玻璃相。BPO _4的结晶发生在比SiO ₂更低的温度下。好组合的微波介电性能与ɛ _{- [R} =〜5，Q×˚F  = 25000 GHz和τ _˚F值的-7.3 ppm的当10重量％的TiO /℃可以得到₂在975℃/ 2小时烧结后的溶液。x ＝ 23wt％的组成与Ag化学反应，但是在975℃/ 2h下烧结后与Cu表现出良好的化学相容性。