The LiNiPO₄ ceramic for the LTCC technology was prepared via the traditional solid-state reaction route and its dielectric properties were investigated for the first time. The best dielectric properties of LiNiPO₄ ceramics with a ε_r of 7.18, Q×f value of 27,754 GHz and τ_f of −67.7 ppm/°C were obtained in samples sintered at 825 °C for 2 h. Rietveld refinement was firstly employed to study the crystal structure and dielectric properties of LiNiPO₄ ceramics. Unfortunately, the relatively large negative τ_f was unfavorable to practical applications. Therefore, we introduced TiO₂, which possessed a considerable positive τ_f, to obtain a desired τ_f value. The prepared LiNiPO₄ ceramics with 15 wt% TiO₂ sintered at 900 °C for 2 h exhibited excellent dielectric properties of ε_r∼11.49, Q×f∼10,792 GHz, τ_f∼−2.8 ppm/°C. The Ag co-fired experiments confirmed the excellent chemical compatibility with LiNiPO₄-TiO₂ ceramics which might be potential dielectric LTCCs for high frequency applications.

通过传统的固态反应路线制备了用于LTCC技术的LiNiPO ₄陶瓷，并首次研究了其介电性能。在825°C烧结2 h的样品中，获得了_εr为7.18，Qx f值为27,754 GHz和_τf为-67.7 ppm /°C的LiNiPO ₄陶瓷的最佳介电性能。首先采用Rietveld精修技术研究LiNiPO ₄陶瓷的晶体结构和介电性能。不幸的是，相对较大的负_τf不利于实际应用。因此，我们引入了TiO ₂，它具有相当大的正_τf，以获得所需的_τf值。所制备的具有15 wt％TiO _2的LiNiPO ₄陶瓷在900°C下烧结2 h，其介电性能极好，_εr约为11.49，Qx f约为10792 GHz，_τf约为-2.8 ppm /°C。Ag共烧实验证实了与LiNiPO ₄ -TiO ₂陶瓷的优异化学相容性，这可能是用于高频应用的潜在电介质LTCC。