Preparation and microwave characterization of BaWO4 filled polytetrafluoroethylene laminates for microwave substrate applications

被引：10

作者：

James, Nijesh K. ^{[1
]}

Rajesh, S. ^{[1
]}

Murali, K. P. ^{[1
]}

Jacob, K. Stanly ^{[1
]}

Ratheesh, R. ^{[1
]}

机构：

[1] Govt India, Dept Informat Technol, C MET, Microwave Mat Div, Trichur 680771, Kerala, India

来源：

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | 2010年 / 21卷 / 12期

关键词：

DIELECTRIC-PROPERTIES; COMPOSITES; CONSTANT;

D O I：

10.1007/s10854-010-0058-2

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Phase pure BaWO4 ceramic filler has been prepared through solid state ceramic route. Planar BaWO4 filled Polytetrafluoroethylene (PTFE) composite substrates were fabricated through Sigma Mixing (SM), Extrusion (E), Calendering (C) followed by Hot pressing (H) (SMECH) processes. Morphology and filler distribution of the composites were analyzed using particle size analysis and scanning electron microscopy. The effect of BaWO4 ceramic filler content on the dielectric properties of the composites was measured at microwave frequency using X-band waveguide cavity perturbation technique. Optimum BaWO4 filler loading in the PTFE matrix has been found out as 74 wt%. The moisture absorption characteristics of the composite samples were ascertained as per IPC-TM-650 2.6.2.1 method. PTFE/BaWO4 composite exhibits a dielectric constant of 4.3 and a loss tangent of 0.004 at optimum tiller loading.

引用

页码：1255 / 1261

页数：7

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