کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1464658 989668 2008 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Shrinkage behavior and interfacial diffusion in Ni-based internal electrodes with BaTiO3 additive
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Shrinkage behavior and interfacial diffusion in Ni-based internal electrodes with BaTiO3 additive
چکیده انگلیسی

The effects of particle size of starting materials and amount of a BaTiO3 additive on the shrinkage behavior and elemental diffusion in Ni-based internal electrodes have been investigated in order to control the shrinkage of the internal electrode in multilayer ceramic capacitors (MLCCs). Two kinds of Ni and BaTiO3 powders were used with different particle sizes. Volume shrinkage over the range of 700–1300 °C at 150 °C intervals and linear shrinkage during sintering were measured for starting materials and composites in a reducing atmosphere. The interfaces of Ni/BaTiO3 composites with 90:10 and 70:30 volume ratios, respectively, were investigated using TEM. Composites with bimodal Ni powder show less shrinkage than those with monomodal Ni powder, showing less shrinkage in monolith Ni of bimodal particle size. The shrinkage behavior is changed during sintering with increasing amounts of BaTiO3 additives in both Ni-based composites. The particle size of the BaTiO3 additive affects the shrinkage behavior of composites, without the additional amount affecting the final shrinkage. A reaction layer of about 300 nm wide is observed at the interface between the Ni and BaTiO3 powders in composites, in which elemental Ni diffuses into the BaTiO3 without counterdiffusion.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 34, Issue 6, August 2008, Pages 1487–1494
نویسندگان
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