摘要：微波介电陶瓷材料作为新时代的产物广泛应用于通讯及电子制造中。而近年来ZnNb2O6介质陶瓷异军突起因其高Q•f值而引起广大科研工作者的关注。但是其谐振频率温度系数为较大的负值，同时它的介电常数比较低，而且因其烧结温度偏高（1150℃），所以严重影响到它的材料使用的推广。为了解决这个问题，本文从添加具有高介电常数和高谐振频率的材料B2O3来提高陶瓷的介电常数，同时改善谐振频率。最终得到的ZnO-Nb2O5-2TiO2陶瓷材料烧结温度为1075℃，τf=56ppm/℃，Q•f=13400GHz，εr=89.01。

本实验通过研究介电常数与介电损耗来研究材料介电性能，数据表明；实验样品在掺杂B2O3浓度相同的情况下其介电常数会随实验烧结温度的增加而提高。而实验中B2O3的加入大大降低了样品的烧结温度值，有一定程度上的改善材料的介电性能但如果B2O3助烧剂的加入量过多时又会破坏样品内部结构从而降低了材料的介电性能。综合实验的各项数据得到以下结论；当烧结温度为1175℃、助烧剂B2O3的添加量为0wt.%时，n0.5OTi0.5NbO4材料的介电性能最好，介电常数εr为89.01，介电损耗tanδ为0.0025。

关键词：低温共烧陶瓷；Zn0.3Ti2.1Nb0.6O5；介电性能；谐振频率；助烧剂；

Abstract：Microwave dielectric ceramic materials as a new era of products widely used in communications and electronics manufacturing. In recent years, ZnNb2O6 dielectric ceramic sudden emergence of its high Q•f value caused by the majority of scientific research workers attention. But its resonant frequency temperature coefficient is a large negative value, while its dielectric constant is relatively low, and because of  its  high  sintering  temperature (1150  ℃), so seriously affect the use of its material to promote. In order to solve this problem, this paper increases the dielectric constant of ceramics by adding material B2O3 with high dielectric constant and high resonant frequency, and improves the resonant frequency. The final sintered temperature of ZnO-Nb2O2-2TiO2ceramic is 1075 ℃, τf = 56ppm /  ℃, Q•f = 13400 GHz, εr = 89.01 .In this experiment, the dielectric properties of the material were studied by studying the dielectric constant and dielectric loss. The data show that the dielectric constant of the experimental sample increases with the same concentration of B2O3 concentration. The addition of B2O3 in the experiment greatly reduces the sintering temperature of the sample and improves the dielectric properties of the material to a certain extent. However, if the amount of B2O3 builder is too large, the internal structure of the sample is destroyed and the dielectric performance. The Zn0.5OTi0.5NbO4 material has the best dielectric properties, the dielectric constant εr is 89.01 when the sintering temperature is 1175 ℃ and the content of B2O3  is 0wt% The dielectric loss tanδ is 0.0025.

Keywords: low temperature co-fired ceramics; Zn0.3Ti2.1Nb0.6O5; dielectric properties; resonant frequency;

目录

第一章绪论 2

1.1引言 2

1.2微波介质陶瓷的性能及其要求 3

1.3微波介质陶瓷的研究现状及发展趋势 4

1.3.1微波介质陶瓷的发展现状与意义 4

1.3.2微波介质陶瓷的发展趋势 5

1.3.3低温共烧陶瓷（LTCC） 5

1.3.4微波介质陶瓷低温烧结的方法 5

1.3.5研究目的和内容 5

第二章