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X9R type multilayer ceramic capacitor dielectric material and preparation method thereof
The invention belongs to the technical field of ceramic capacitor dielectric materials, and particularly relates to an X9R type multilayer ceramic capacitor dielectric material and a preparation method thereof. The X9R type multilayer ceramic capacitor dielectric material is of a 'core-shell' structure, 0.9 BT-0.1BNT is used as a 'core', and a surface coating layer formed by a cobalt element and aneodymium element is used as a 'shell'. In the X9R type multilayer ceramic capacitor dielectric material, the cobalt element can react with the neodymium element to form a compound or replace the position of the neodymium element, so that the diffusion rate of the neodymium element is reduced, the doping elements are prevented from diffusing towards the core, so that more doping elements stay atthe shell part, the proportion of the shell in the core-shell structure is further reduced, the low-temperature dielectric peak of the obtained multilayer ceramic capacitor dielectric material is moremoderate, the overall capacitance-temperature stability is improved, and the multilayer ceramic capacitor dielectric material conforms to the X9R standard.
本发明属于陶瓷电容器介质材料技术领域，具体涉及一种X9R型多层陶瓷电容器介质材料及其制备方法。本发明X9R型多层陶瓷电容器介质材料为“芯‑壳”结构，其中，以0.9BT‑0.1BNT为“芯”、以钴元素和钕元素形成的表面包覆层为“壳”。本发明X9R型多层陶瓷电容器介质材料中，钴元素可以与钕元素反应形成复合物或者取代钕元素的位置从而降低钕元素的扩散速率，阻碍掺杂元素向“芯”扩散，使更多的掺杂元素停留在“壳”部，进而降低“芯‑壳”结构中“壳”的占比，使所得多层陶瓷电容器介质材料的低温介电峰更加缓和，整体容温稳定性提高，符合X9R标准。
X9R type multilayer ceramic capacitor dielectric material and preparation method thereof
The invention belongs to the technical field of ceramic capacitor dielectric materials, and particularly relates to an X9R type multilayer ceramic capacitor dielectric material and a preparation method thereof. The X9R type multilayer ceramic capacitor dielectric material is of a 'core-shell' structure, 0.9 BT-0.1BNT is used as a 'core', and a surface coating layer formed by a cobalt element and aneodymium element is used as a 'shell'. In the X9R type multilayer ceramic capacitor dielectric material, the cobalt element can react with the neodymium element to form a compound or replace the position of the neodymium element, so that the diffusion rate of the neodymium element is reduced, the doping elements are prevented from diffusing towards the core, so that more doping elements stay atthe shell part, the proportion of the shell in the core-shell structure is further reduced, the low-temperature dielectric peak of the obtained multilayer ceramic capacitor dielectric material is moremoderate, the overall capacitance-temperature stability is improved, and the multilayer ceramic capacitor dielectric material conforms to the X9R standard.
本发明属于陶瓷电容器介质材料技术领域，具体涉及一种X9R型多层陶瓷电容器介质材料及其制备方法。本发明X9R型多层陶瓷电容器介质材料为“芯‑壳”结构，其中，以0.9BT‑0.1BNT为“芯”、以钴元素和钕元素形成的表面包覆层为“壳”。本发明X9R型多层陶瓷电容器介质材料中，钴元素可以与钕元素反应形成复合物或者取代钕元素的位置从而降低钕元素的扩散速率，阻碍掺杂元素向“芯”扩散，使更多的掺杂元素停留在“壳”部，进而降低“芯‑壳”结构中“壳”的占比，使所得多层陶瓷电容器介质材料的低温介电峰更加缓和，整体容温稳定性提高，符合X9R标准。
X9R type multilayer ceramic capacitor dielectric material and preparation method thereof
X9R型多层陶瓷电容器介质材料及其制备方法
ZHANG LEI (Autor:in) / ZHUANG HOURONG (Autor:in) / ZENG JUN (Autor:in) / YU HONGYU (Autor:in) / WANG HONGZHAO (Autor:in)
07.07.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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