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CN1736951A 一种低介电常数纳米微波介质陶瓷粉体的制备方法 失效 - 权利终止

一种低介电常数纳米微波介质陶瓷粉体的制备方法
摘要：
本发明公开了一种低介电常数纳米微波介质陶瓷粉体的制备方法，包括：(1)将镁的无机盐水溶解形成镁的无机盐水溶液；再按硅与镁为1∶1的摩尔比加入硅溶胶，搅拌；(2)将一定量的柠檬酸加入乙二醇中，加热溶解；(3)以一定的摩尔比混合上述两溶液，加热蒸发水份；升温到125℃～135℃保温2～4小时，继续升温到1 80℃～220℃保温2～4小时，得到的黑色物质进行研磨后在800℃～1000℃煅烧，可得到粒径在80～100nm且分散良好的MgSiO3、Mg2SiO4纳米级微波介质陶瓷粉体，大大降低合成温度。本发明制得的纳米粉体烧结成瓷后具有优良的微波介电性能，可用于制备0402、0201多层微波陶瓷电容器等小型片式多层微波器件，具有极大的工业应用价值。
摘要（英）：

The invention discloses a preparation method for nano microwave medium ceramic powder of low dielectric constant, which comprises: (1) dissolving the magnesium into inorganic salt, and adding silicon sol to mix according to mole rate of 1:1; (2) adding an mount of citric acid into ethylene alcohol for heating dissolution; (3) mixing the said two solutions with given mole rate, heating to vaporize water; heating to 125-135Deg, keeping temperature for 2-4h; continuing to heating to 180-220Deg and keeping temperature for 2-4h; grinding the obtained black material and sintering at 800-1000Deg. This method decreases greatly the synthesis temperature. the product has excellent microwave dielectric property and well industrial application value.

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