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Giant dielectric low-loss strontium titanate-based ceramic material with high resistivity and preparation method of giant dielectric low-loss strontium titanate-based ceramic material
The invention discloses a giant dielectric low-loss strontium titanate-based ceramic material with high resistivity and a preparation method thereof, and the method comprises the following steps: preparing materials according to a chemical formula Sr1-xCexTiO3 (x represents a molar percentage and is greater than 0 and less than 0.014), carrying out wet ball-milling mixing on the powder, pre-sintering the dried powder at 1200 DEG C for 2 hours, carrying out secondary ball-milling, sieving and molding, and obtaining the giant dielectric low-loss strontium titanate-based ceramic material with high resistivity. And finally, preserving heat for 3 hours at the temperature of 1510 DEG C in a tube furnace N2 atmosphere, and sintering. The preparation method comprises the following steps: uniformly coating Bi2O3 powder on the surface of ceramic, carrying out heat preservation at 1200 DEG C for 2 hours to obtain a fired ceramic sample, uniformly coating silver electrode slurry on the front and back surfaces of the sample, and carrying out heat treatment to obtain the giant dielectric low-loss ceramic material which shows good stability, but the resistivity of the giant dielectric low-loss ceramic material declines in a test voltage range. The Bi2O3 powder is coated on the surface of the ceramic, and the Bi ions are infiltrated into the ceramic by firing again, so that the resistivity is improved by two orders of magnitude, and the resistance decline phenomenon does not occur.
本发明公开了一种具有高电阻率的巨介电低损耗钛酸锶基陶瓷材料及其制备方法，该方法包括：按照化学式Sr1‑xCexTiO3，其中x表示摩尔百分比，且0＜x＜0.014配料，对粉体进行湿法球磨混合，干燥后的粉体在1200℃下预烧2h，再经过二次球磨、过筛和成型，最终在管式炉N2气氛中1510℃温度下保温3h烧结制成；将Bi2O3粉末均匀的涂在陶瓷表面，在1200℃下保温2h，得到烧制好的陶瓷样品，在样品正反两面均匀涂覆银电极浆料并热处理得到巨介电低损耗陶瓷材料，该材料表现出良好的稳定性，但其电阻率在测试电压范围内存在衰退现象，通过将Bi2O3粉末涂敷在陶瓷的表面，再次烧制使Bi离子渗入陶瓷，使电阻率提升了两个数量级且未出现电阻衰退现象。
Giant dielectric low-loss strontium titanate-based ceramic material with high resistivity and preparation method of giant dielectric low-loss strontium titanate-based ceramic material
The invention discloses a giant dielectric low-loss strontium titanate-based ceramic material with high resistivity and a preparation method thereof, and the method comprises the following steps: preparing materials according to a chemical formula Sr1-xCexTiO3 (x represents a molar percentage and is greater than 0 and less than 0.014), carrying out wet ball-milling mixing on the powder, pre-sintering the dried powder at 1200 DEG C for 2 hours, carrying out secondary ball-milling, sieving and molding, and obtaining the giant dielectric low-loss strontium titanate-based ceramic material with high resistivity. And finally, preserving heat for 3 hours at the temperature of 1510 DEG C in a tube furnace N2 atmosphere, and sintering. The preparation method comprises the following steps: uniformly coating Bi2O3 powder on the surface of ceramic, carrying out heat preservation at 1200 DEG C for 2 hours to obtain a fired ceramic sample, uniformly coating silver electrode slurry on the front and back surfaces of the sample, and carrying out heat treatment to obtain the giant dielectric low-loss ceramic material which shows good stability, but the resistivity of the giant dielectric low-loss ceramic material declines in a test voltage range. The Bi2O3 powder is coated on the surface of the ceramic, and the Bi ions are infiltrated into the ceramic by firing again, so that the resistivity is improved by two orders of magnitude, and the resistance decline phenomenon does not occur.
本发明公开了一种具有高电阻率的巨介电低损耗钛酸锶基陶瓷材料及其制备方法，该方法包括：按照化学式Sr1‑xCexTiO3，其中x表示摩尔百分比，且0＜x＜0.014配料，对粉体进行湿法球磨混合，干燥后的粉体在1200℃下预烧2h，再经过二次球磨、过筛和成型，最终在管式炉N2气氛中1510℃温度下保温3h烧结制成；将Bi2O3粉末均匀的涂在陶瓷表面，在1200℃下保温2h，得到烧制好的陶瓷样品，在样品正反两面均匀涂覆银电极浆料并热处理得到巨介电低损耗陶瓷材料，该材料表现出良好的稳定性，但其电阻率在测试电压范围内存在衰退现象，通过将Bi2O3粉末涂敷在陶瓷的表面，再次烧制使Bi离子渗入陶瓷，使电阻率提升了两个数量级且未出现电阻衰退现象。
Giant dielectric low-loss strontium titanate-based ceramic material with high resistivity and preparation method of giant dielectric low-loss strontium titanate-based ceramic material
一种具有高电阻率的巨介电低损耗钛酸锶基陶瓷材料及其制备方法
PU YONGPING (author) / PAN QIAO (author) / ZHANG JINBO (author) / XIE HAOCHEN (author) / CHEON KA-LEE (author)
2023-12-08
Patent
Electronic Resource
Chinese
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