摘要
通过熔盐法将MgTiO3薄膜均匀地包覆在钛酸钡颗粒表面形成芯壳结构。包覆机理是在MgCl2的熔盐状态800℃下Mg2+取代BaTiO3中的Ba2+离子表面生成MgTiO3薄膜薄膜厚度约20nm。采用TEM、XRD验证了MgTiO3的包覆。包覆粉末经烧成瓷后具有良好的高频性能在1MHz～800MHz的频率范围内介电常数恒定为130。
Barium Titanate fine particles were coated homogeneously with Magnesium Titanate by the fused salt method. The thickness of the Magnesium Titanate film is about 20nm. The coating was validated by TEM and XRD. The mechanism of the coating is that: when magnesium chloride is fused in 800 degreesC, Mg2+ will take the place of Ba2+ in BaTiO3, and then form MgTiO3 film on the surface of Barium Titanate particles. Ceramics sintered from the coated particles show good performance at high frequency. The dielectric constant is keeping about 130 at the frequency range from 1MHz to 800MHz.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2001年第5期627-630,共4页
Chinese Journal of Inorganic Chemistry
