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Microwave composite dielectric material with low dielectric loss and preparation method
The invention relates to a microwave composite dielectric material with low dielectric loss and a preparation method. The invention is characterized in that the material is prepared from following raw material components in parts by mass: 45-55wt% of SrCa<1-n>TiO3, 0.6-0.75wt% of a titanate coupling agent, 2-8wt% of SiO2, 0.03-0.12wt% of a silane coupling agent, 34-40wt% of PTFE, and 6-8wt% of alkali-free short glass fiber; the dielectric constant epsilon r of the microwave composite dielectric material is 6-13, the dielectric loss tan delta is 0.002-0.004, and the coefficient of linear thermal expansion is 12-20ppm/DEG C. The coupling agents are used for modified treatments of the ceramic filling materials SrCa<1-n>TiO3 and SiO2 respectively, modified ceramic filling materials, polytetrafluoroethylene and the alkali-free short glass fiber are mixed with ball milling, dried, sieved, shaped and sintered. The prepared polytetrafluoroethylene-based microwave composite dielectric material has the characteristics of proper dielectric constant, low dielectric loss, a linear thermal expansion coefficient which is matched with copper, etc. At the same time, the preparation technology is simple and the cost is low.
Microwave composite dielectric material with low dielectric loss and preparation method
The invention relates to a microwave composite dielectric material with low dielectric loss and a preparation method. The invention is characterized in that the material is prepared from following raw material components in parts by mass: 45-55wt% of SrCa<1-n>TiO3, 0.6-0.75wt% of a titanate coupling agent, 2-8wt% of SiO2, 0.03-0.12wt% of a silane coupling agent, 34-40wt% of PTFE, and 6-8wt% of alkali-free short glass fiber; the dielectric constant epsilon r of the microwave composite dielectric material is 6-13, the dielectric loss tan delta is 0.002-0.004, and the coefficient of linear thermal expansion is 12-20ppm/DEG C. The coupling agents are used for modified treatments of the ceramic filling materials SrCa<1-n>TiO3 and SiO2 respectively, modified ceramic filling materials, polytetrafluoroethylene and the alkali-free short glass fiber are mixed with ball milling, dried, sieved, shaped and sintered. The prepared polytetrafluoroethylene-based microwave composite dielectric material has the characteristics of proper dielectric constant, low dielectric loss, a linear thermal expansion coefficient which is matched with copper, etc. At the same time, the preparation technology is simple and the cost is low.
Microwave composite dielectric material with low dielectric loss and preparation method
WANG LIXI (author) / JIN SHIQI (author) / WANG LINZI (author) / ZHANG QITU (author)
2016-02-24
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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