Ceramics International ( IF 5.2 ) Pub Date : 2021-09-22 , DOI: 10.1016/j.ceramint.2021.09.159 Jian Bao 1 , Jialun Du 2 , Lintao Liu 1 , Haitao Wu 1 , Yuanyuan Zhou 3 , Zhenxing Yue 4
A new type of microwave dielectric ceramics with low dielectric loss was fabricated through a traditional solid-phase method. X-ray diffraction and density tests showed that KSrPO4 ceramics with a single orthorhombic phase could be synthesized and densified at 950 °C, and the crystal structure of KSrPO4 was further confirmed by Rietveld refinement analysis. The densification temperature of KSrPO4 was lower than 961 °C, indicating the ceramics could be used in LTCC devices. Additionally, based on the complex chemical bond theory, some internal parameters of KSrPO4 ceramics were calculated and the effects of these parameters on the properties of KSrPO4 were systematically analyzed for the first time. Furthermore, the composite dielectric constant and loss of KSrPO4 ceramics were analyzed by infrared reflectance spectroscopy, and the theoretical loss and the actual loss were compared. Finally, a vector network analyzer was employed to measure the microwave dielectric properties of all samples. The results showed that KSrPO4 sintered at 950 °C obtain the best microwave dielectric properties, including εr = 7.85, Q·f = 34,527 GHz (at 10.43 GHz) and τf = −14.82 ppm/°C.
中文翻译:
基于K2O-SrO-P2O5的高品质因数、低烧结温度的新型微波介电陶瓷
采用传统固相法制备了一种新型低介电损耗微波介电陶瓷。X射线衍射和密度测试表明,可以在950°C下合成并致密化具有单一正交相的KSrPO 4陶瓷,并且通过Rietveld细化分析进一步证实了KSrPO 4的晶体结构。KSrPO 4的致密化温度低于961°C,表明该陶瓷可用于LTCC器件。此外,基于复杂化学键理论,计算了KSrPO 4陶瓷的一些内部参数以及这些参数对KSrPO 4性能的影响首次进行系统分析。此外,通过红外反射光谱分析了KSrPO 4陶瓷的复合介电常数和损耗,并将理论损耗与实际损耗进行了比较。最后,采用矢量网络分析仪测量所有样品的微波介电特性。结果表明,KSrPO 4在 950 °C 下烧结获得最佳微波介电性能,包括ε r = 7.85、Q·f = 34,527 GHz(在 10.43 GHz)和τ f = -14.82 ppm/°C。