微波低介电陶瓷锶长石的制备与研究
发布时间：2018-07-29 10:14
【摘要】：通过使用高岭土替代Al_2O_3和SiO_2,制备了锶长石陶瓷,以Al_2O_3和SiO_2为变化因素,在不同的温度下进行了正交实验,运用微波矢量网络分析仪和XRD进行综合分析。结果证明:用高岭土替代Al_2O_3和SiO_2,能使锶长石的烧结温度降低200℃左右。在烧结温度范围内,随着烧结温度的提高,Q值明显提高,原因是温度较低时,反应不完全。实验所得的最佳烧结温度是1360℃。在微波频段锶长石具有低于2.9的介电常数和高于1000的品质因数,达到了实用指标。在我们的实验中当Al_2O_3和SiO_2的摩尔量之比为0.5,碳酸锶的含量为1mol,氧化铝的含量为1.08mol时,在测试频率为18.005GHz时,介电常数可低到2.86,Q值为1071,迄今为止未见同类报道。锶长石陶瓷是一种很有希望的微波低介材料。掺杂B_2O_3、Y_2O_3和ZrO_2均对锶长石的介电性能产生了影响,B~(3+)离子和Zr~(4+)离子较易进入晶格,而Y~(3+)离子较多的富集于晶界上,富集于晶界上的离子会明显降低材料的Q值。其中掺杂B_2O_3最优,当掺杂B_2O_3的含量为0.035mol时,样品的介电常数为2.85,Q值为1195。
[Abstract]:Strontium feldspar ceramics were prepared by using kaolin instead of Al_2O_3 and Sio _ 2. Orthogonal experiments were carried out at different temperatures using Al_2O_3 and SiO_2 as variable factors. Microwave vector network analyzer and XRD were used for comprehensive analysis. The results show that the sintering temperature of strontium feldspar can be reduced about 200 鈩，
本文编号：2152355
[Abstract]:Strontium feldspar ceramics were prepared by using kaolin instead of Al_2O_3 and Sio _ 2. Orthogonal experiments were carried out at different temperatures using Al_2O_3 and SiO_2 as variable factors. Microwave vector network analyzer and XRD were used for comprehensive analysis. The results show that the sintering temperature of strontium feldspar can be reduced about 200 鈩，
本文编号：2152355
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