Ca0.7La0.2TiO3陶瓷填充氰酸酯树脂高频介电复合材料的制备与性能

张恒; 黄燕春; 彭海益; 缪金波; 邓诗峰; 姚晓刚; 林慧兴

doi:10.13801/j.cnki.fhclxb.20210128.001

Ca_0.7La_0.2TiO₃陶瓷填充氰酸酯树脂高频介电复合材料的制备与性能

doi: 10.13801/j.cnki.fhclxb.20210128.001

张恒^1,,
黄燕春^1,,
彭海益^2,,
缪金波^1,,
邓诗峰^1, ,,
姚晓刚²,
林慧兴^2,

1.
华东理工大学材料科学与工程学院　特种功能高分子材料及相关技术教育部重点实验室，上海 200237
2.
中国科学院上海硅酸盐研究所信息功能材料与器件研究中心，上海 200050

基金项目: 装备发展部重点基金(61409220301)；中央高校基本科研业务费专项资金资助 (50321042017001)

详细信息

通讯作者:
邓诗峰，博士，副教授，硕士生导师，研究方向为特种树脂及其复合材料　E-mail：sfdeng@ecust.edu.cn

中图分类号: TB332
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- 被引次数: 0
出版历程
- 收稿日期: 2020-11-17
- 录用日期: 2021-01-20
- 网络出版日期: 2021-01-28
- 刊出日期: 2021-11-01

Preparation and properties of Ca_0.7La_0.2TiO₃ceramic filled cyanate ester resin high frequency dielectric composite

1.
East China University of Science and Technology, School of Materials Science and Engineering, Key Laboratory of Specially Functional Polymeric Materials and Related Technology of the Ministry of Education, Shanghai 200237, China
2.
Information Materials and Devices Research Center, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai 200050, China

摘要

摘要: 将具有优异介电性能的Ca_0.7La_0.2TiO₃陶瓷填充到氰酸酯(CE)树脂中，通过熔融浇铸技术成功制备了Ca_0.7La_0.2TiO₃/CE复合材料。结果表明，不同Ca_0.7La_0.2TiO₃填料体积分数的复合材料微观结构致密。填料体积分数为40vol%时，获得了高介电常数(ε)和低介电损耗(tanδ) (ε=25.7，tanδ=0.0055, 10 GHz)的复合材料, 且弯曲强度达到130 MPa，同时材料的导热系数提高到0.8601 W/(m·K)，可有效进行散热。TGA结果表明，相比于CE树脂，复合材料具有更高的热稳定性，在高频通信、集成电路等领域具有良好的应用前景。
- 氰酸酯 /
- 陶瓷 /
- 介电常数 /
- 介电损耗 /
- 力学性能 /
- 热稳定性
Abstract: The Ca_0.7La_0.2TiO₃ ceramic with excellent dielectric properties was filled into cyanate ester (CE) resin to prepare Ca_0.7La_0.2TiO₃/CE composite by a melt pouring technique. The results show that dense microstructure is observed in the composites with different filler volume fractions. The Ca_0.7La_0.2TiO₃/CE composite with a high dielectric constant (ε) and low dielectric loss (tanδ) (ε=25.7, tanδ=0.0055, at 10 GHz) is obtained when the filler volume fraction reaches 40%. Meanwhile, the bending strength reaches 130 MPa. And the thermal conductivity increases to 0.8601 W/(m·K), which can effectively dissipate heat. TGA results show that compared with CE resin, the composites have higher thermal stability and have good application prospects in high-frequency communications, integrated circuits and other fields.
- cyanate ester /
- ceramics /
- dielectric constant /
- dielectric loss /
- mechanical properties /
- thermal stability

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图 1 Ca_0.7La_0.2TiO₃陶瓷的SEM图像

Figure 1. SEM image of Ca_0.7La_0.2TiO₃ ceramics

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图 2 不同Ca_0.7La_0.2TiO₃体积分数的Ca_0.7La_0.2TiO₃/CE复合材料的横截面SEM图像

Figure 2. Cross-sectional SEM images of the Ca_0.7La_0.2TiO₃/CE composites with different Ca_0.7La_0.2TiO₃ volume fractions

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图 3 Ca_0.7La_0.2TiO₃/CE复合材料的相对密度和实验密度与理论密度的比较

Figure 3. Comparison of relative density and experimental density with theoretical density of Ca_0.7La_0.2TiO₃/CE composites

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图 4 不同Ca_0.7La_0.2TiO₃体积分数下Ca_0.7La_0.2TiO₃/CE复合材料的介电性能(10 GHz)(a)以及理论与实验介电常数的对比 (b)

Figure 4. Dielectric properties (10 GHz) of Ca_0.7La_0.2TiO₃/CE composites with different Ca_0.7La_0.2TiO₃ volume fractions (a) and comparisons between theoretical and experimental dielectric constants (b)

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图 5 不同Ca_0.7La_0.2TiO₃体积分数Ca_0.7La_0.2TiO₃/CE复合材料弯曲强度

Figure 5. Flexural strength of Ca_0.7La_0.2TiO₃/CE composites under different Ca_0.7La_0.2TiO₃ volume fractions

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图 6 不同Ca_0.7La_0.2TiO₃体积分数的Ca_0.7La_0.2TiO₃/CE复合材料在N₂下的TGA曲线

Figure 6. TGA curves of Ca_0.7La_0.2TiO₃/CE composites under N₂ with different Ca_0.7La_0.2TiO₃ volume fractions

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图 7 不同Ca_0.7La_0.2TiO₃体积分数下Ca_0.7La_0.2TiO₃/CE复合材料的导热系数

Figure 7. Thermal conductivity of Ca_0.7La_0.2TiO₃/CE composites under different Ca_0.7La_0.2TiO₃ volume fractions

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表 1 Ca_0.7La_0.2TiO₃/氰酸酯(CE)复合材料的组成

Table 1. Composition of Ca_0.7La_0.2TiO₃/cyanate ester (CE) composite materials

Sample	Composition/vol%
Sample	Ca_0.7La_0.2TiO₃	CE
CE	0	100
10vol%Ca_0.7La_0.2TiO₃/CE	10	90
20vol%Ca_0.7La_0.2TiO₃/CE	20	80
30vol%Ca_0.7La_0.2TiO₃/CE	30	70
40vol%Ca_0.7La_0.2TiO₃/CE	40	60
50vol%Ca_0.7La_0.2TiO₃/CE	50	50
55vol%Ca_0.7La_0.2TiO₃/CE	55	45

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表 2 不同Ca_0.7La_0.2TiO₃体积分数Ca_0.7La_0.2TiO₃/CE复合材料在N₂下的TGA数据

Table 2. TGA data of Ca_0.7La_0.2TiO₃/CE composites under N₂ with different Ca_0.7La_0.2TiO₃ volume fractions

Sample	T_d5/℃	Mass residual at 800℃/wt%
CE	410	40
10vol%Ca_0.7La_0.2TiO₃/CE	415	56
20vol%Ca_0.7La_0.2TiO₃/CE	418	65
30vol%Ca_0.7La_0.2TiO₃/CE	420	75
40vol%Ca_0.7La_0.2TiO₃/CE	425	82
50vol%Ca_0.7La_0.2TiO₃/CE	430	85
55vol%Ca_0.7La_0.2TiO₃/CE	435	90
Note: T_d5—Temperature at 5wt% mass loss.

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