研究了BaCu(B_2O_5)(简写为BCB)掺入对14CaO-4BaO-8Li_2O-12Sm_2O_3-63TiO_2(简写为CBLST)微波介质陶瓷介电性能的影响.用XRD和SEM研究其相组成及微观形貌.结果表明:BaCu(B_2O_5)掺入能显著降低CBLST陶瓷的烧结温度,由1325 ℃降至1100 ℃.1100 ℃烧结2 h后,仍包含正交钙钛矿相和棒状的BST相.掺入6wt% BaCu(B_2O_5)的CBLST陶瓷取得了较好的介电性能:Kr=87.76,tanδ=0.018,TCF=-4.27 ppm/℃(1 MHz).
Effects of BaCu(B_2O_5) on the dielectric properties of 14CaO-4BaO-8Li_2O-12Sm_2O_3-63TiO_2 microwave dielectric ceramics were investigated. The crystalline structure and micromorphology were studied by XRD and SEM, respectively. The sintering temperature of the specimens could be reduced from 1325 ℃ to 1100 ℃ and perovskite phase and BST phase were formed after sintering at 1100 ℃ for 2 h. The specimens with 6wt% BaCu(B_2O_5) sintered at 1100 ℃ for 2 h showed Kr of 87.76,tanδ of 0.018,TCF of -4.27 ppm/℃ (1 MHz).
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