Ca₉A(VO₄)₇ (A = La, Pr, Nd and Sm) ceramics have been prepared by conventional solid state ceramic route. The phase purity of the samples was confirmed by powder X-ray diffraction technique. Raman spectroscopic studies confirm the existence of (VO₄)³⁻ vibrational groups in Ca₉A(VO₄)₇ ceramics. Ca₉A(VO₄)₇ (A = La, Pr, Nd and Sm) ceramics exhibit microwave dielectric properties of ε_r = 9.8 to 10.4, Qxf = 4500 to 14,900 GHz and low temperature coefficient of resonant frequency τ_f = −3.8 to −10.2 ppm/°C. Ca₉A(VO₄)₇ ceramics with A = La, Nd and Sm show good chemical compatibility with Ag electrode and can be used as candidate materials for LTCC applications.

通过常规固态陶瓷路线已经制备了Ca ₉ A（VO ₄）₇（A = La，Pr，Nd和Sm）陶瓷。样品的相纯度通过粉末X射线衍射技术确认。拉曼光谱研究证实，Ca ₉ A（VO ₄）₇陶瓷中存在（VO ₄）³⁻振动基团。Ca ₉ A（VO ₄）₇（A = La，Pr，Nd和Sm）陶瓷表现出的微波介电特性为_εr  = 9.8至10.4，Qxf = 4500至14,900 GHz且谐振频率的低温系数_τf  = -3.8至-10.2 ppm /°C。钙A = La，Nd和Sm的₉ A（VO ₄）₇陶瓷与Ag电极表现出良好的化学相容性，可用作LTCC应用的候选材料。