| 摘要 |
<p>Methods of coating ceramic (e.g., barium titanate-based) particles, as well as articles and compositions formed from the coated particles are provided. The methods involve forming a mixture of barium titanate-based particles and at least two dopant metal solutions. According to some methods, a second solution (e.g., a base) is added to the mixture to cause the dopant metals to sequentially precipitate onto surfaces of the particles. The resulting particles are coated with respective layers having different dopant metal compositions. According to other methods, the mixture of barium titanate-based particles and at least two dopant metal solutions are added to a second solution (e.g., a base) to precipitate the dopant metal or metals to form a coating on surfaces of the barium titanate-based particles. The resulting particles are coated with a homogeneous coating. The coated barium titanate-based particles produced according to the methods of the invention may be further processed to form, for example, green layers and/or dielectric layers in electronic devices such as MLCCs. The methods provide a uniform distribution of the dopant metals throughout the barium titanate-based particulate composition and limit dopant segregation which can improve properties of the dielectric layers amongst other advantages.</p> |
