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发明公开
CN102978500A 一种高导热微波衰减AlN基复合材料及其制备方法 无效 - 驳回 复审申请

一种高导热微波衰减AlN基复合材料及其制备方法
摘要：
一种高导热微波衰减AlN基复合材料及其制备方法，属于微波电子真空技术领域。本发明选取CNTs和W作为金属相，AlN为介质相，包括CNTs：（0.1-2.0）vol.%、W：（1.0-20.0）vol.%和AlN：（100-CNTs-W）vol.%。将CNTs、W粉和AlN粉按一定的体积比混合得到混合料；将混合料成形与烧结，得到CNTs/W/AlN复相微波吸收材料。材料的相对密度>98%，介电常数17~25，介电损耗角正切>0.04，在70kHz~1MHz范围内具有良好的吸波性能，特别适合制备微波电真空器件，应用于消极电子对抗和微波测量系统中。
摘要（英）：

The invention discloses a high thermal conductivity microwave attenuation AlN-based composite material and a preparation method thereof, belonging to the field of microwave electronics vacuum technology. According to the high thermal conductivity microwave attenuation AlN-based composite material, (0.1-2.0)vol.% of CNTs (Carbon Nano Tubes) and (1.0-20.0)vol.% of W which are used as metal phases and (100-CNTs-W)vol.% of AlN which is used as a medium phase are used. The preparation method comprises the steps of: mixing the CNTs, the W powder and the AlN powder according to a certain volume ratio to obtain a mixture; and forming and sintering the mixture to obtain a CNTs/W/AlN complex phase microwave absorbing material. The high thermal conductivity microwave attenuation AlN-based composite material has relative density being more than 98 percent, dielectric constant being 17-25 and dielectric loss angle tangent being more than 0.04, has excellent wave absorbing property within a range of 70kHz-1MHz, is especially applicable to preparation of a microwave electric vacuum device, and can be applied to a passive electronic countermeasure and microwave measurement system.

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