Ceramic dielectric material and manufacture method thereof and ceramic capacitor and manufacture method thereof

Abstract

The invention relates to a ceramic dielectric material and a ceramic capacitor. The ceramic dielectric material and a manufacture method of the ceramic dielectric material adopt Sr<1-x>CaxTi<1-y>SiyO3 (wherein 0.05<=x<=0.35, 0.02<=y<=0.25) synthesized through a solid phase reaction method as main crystalline phase materials, and main crystalline phase components account for 90-96% of components of dielectric material by weight percentage; and then four or more than three of BaO, MgO, ZrO2, Nb2O5, MnO2, Y2O3, Al2O3, ZnO, B2O3 and R2O3 (R is at least one of Sm, Ho, Dy) as modifiers are added, and the modifiers account for 10-4% of the components of the dielectric material by weight percentage. According to the components, the ceramic dielectric material with reducibility and without harmful element such as lead and capable of being sintered in a restoring atmosphere can be obtained. Simultaneously, the invention provides the ceramic capacitor manufactured by the ceramic dielectric materials.

Description

technical field [0001] The invention relates to a ceramic dielectric material and a ceramic capacitor. Background technique [0002] Ceramic dielectric materials with SL temperature characteristics generally have low-to-medium dielectric constant values ​​and low dielectric loss at high frequencies. This type of ceramic dielectric capacitor is widely used in resonant circuits and circuits that need to compensate for temperature effects. Traditional ceramic dielectric materials of this type have experienced the development process from harmful elements such as lead to lead-free and other harmful elements; but in the use of capacitor electrode materials, it is well known that precious metal silver or silver alloys are commonly used as electrodes; thus making The material cost of capacitors remains high. In order to reduce costs, manufacturers hope to replace the noble metal electrodes with cheap base metals (such as copper or copper alloys). [0003] In terms of electrode m...

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Problems solved by technology

Traditional ceramic dielectric materials of this type have experienced the development process from harmful elements such as lead to lead-free and other harmful elements; but in the use of capacitor electrode materials, it is well known that precious metal silver or silver alloys are generally used as electrodes; thus making The cost of materials for capacitors remains high

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