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发明授权
CN105474334B 磁性构件用绝缘包覆粉末 有权

磁性构件用绝缘包覆粉末
摘要：
提供一种绝缘包覆扁平粉末(2)，其用于对1MHz～50GHz的频域的电磁波的屏蔽或吸收有效的电磁波吸收体这样的磁性构件。本发明的绝缘包覆扁平粉末(2)，具备经过了扁平加工的金属粉末(4)、和附着在该金属粉末(4)的表面上的绝缘性的皮膜(6)。金属粉末(4)的长宽比，为10以上且300以下。皮膜(6)包含含有钛醇盐类的物质的聚合物。优选在该粉末(2)中，皮膜(6)的厚度相对于金属粉末(4)的厚度之比为0.002以上且0.2以下。优选在该粉末(2)中，钛醇盐类为钛醇盐的低聚物。优选在该粉末(2)中，皮膜(6)对金属粉末(4)的包覆率为20％以上。优选在该粉末(2)中，皮膜(6)的厚度为1nm以上且200nm以下，该皮膜(6)由钛的氧化物构成。
摘要（英）：

Provided is an insulator-coated flat powder (2) that is for a magnetic member such as an electromagnetic wave absorber that is effective in blocking or absorbing electromagnetic waves in a frequency range of 1 MHz-50 GHz. The insulator-coated flat powder (2) is provided with flattened metal particles (4) and an insulating film (6) that is attached to the surface of the metal particles (4). The aspect ratio of the metal particles (4) is 10-300. The film (6) is a polymer that contains a titanium alkoxide. It is preferable that the ratio of the thickness of the film (6) to the thickness of the metal particles (4) in the powder (2) be 0.002-0.2. It is preferable that the titanium alkoxide in the powder (2) be an oligomer of a titanium alkoxide. It is preferable that the coverage rate of the metal particles (4) by the film (6) in the powder (2) be 20% or higher. It is preferable that the thickness of the film (6) in the powder (2) be 1 nm to 200 nm, and that the film (6) be an oxide of titanium.

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