ZnO-deficient Zn_2-xGeO_4-x ceramics with 0.05 ≤ x ≤ 0.15 were synthesized because a ZnO secondary phase is formed in the stoichiometric Zn₂GeO₄ ceramics synthesized using micrometer-sized ZnO and GeO₂ powders. The Zn_1.9GeO_3.9 ceramic sintered at 1000 °C showed a homogeneous Zn₂GeO₄ phase with good microwave dielectric properties: ε_r of 6.8, Q × f of 49,000 GHz, and τ_f of −16.7 ppm/°C. However, its sintering temperature was still too high for it to be used as an advanced substrate for low-temperature co-fired ceramic devices. Therefore, various amounts of B₂O₃ were added to the Zn_1.9GeO_3.9 ceramics to reduce their sintering temperature. Owing to the formation of a B₂O₃-GeO₂ liquid phase, these ceramics were well sintered at low temperatures between 925 °C and 950 °C. In particular, 15 mol% B₂O₃-added Zn_1.9GeO_3.9 ceramic sintered at 950 °C showed promising microwave dielectric properties for advanced substrates without the reaction with an Ag electrode: ε_r = 6.9, Q × f = 79,000 GHz, and τ_f = −15 ppm/°C.

ZnO类缺陷的Zn _{2- X}的GeO _{4- X}与陶瓷0.05≤  X  ≤因为在化学计量的Zn形成的ZnO二次相0.15合成₂的GeO _4个使用微米大小的ZnO和合成的GeO陶瓷_2成粉末。锌_1.9的GeO _3.9陶瓷在1000烧结℃下表现出均匀的Zn ₂的GeO ₄相具有良好的介电性能：ε _{- [R} 6.8，Q  ×  ˚F 49000千兆赫，和τ _˚F-16.7 ppm /°C。但是，其烧结温度仍然太高，不能用作低温共烧陶瓷器件的高级基材。因此，向Zn _1.9 GeO _3.9陶瓷中添加了各种数量的B ₂ O ₃，以降低其烧结温度。由于形成了B ₂ O ₃ -GeO ₂液相，这些陶瓷在925°C至950°C的低温下进行了很好的烧结。特别地，添加15mol％的B ₂ O _3的Zn _1.9 GeO _3.9在950陶瓷烧结℃下显示出有希望用于先进基板微波介电性能而不与Ag电极的反应：ε _{- [R}  = 6.9，Q  ×  ˚F  = 79000千兆赫，和τ _˚F  = -15 PPM /℃。