Sintered alumina with low dielectric loss

Low-Loss Plasmonic Dielectric Nanoresonators.

Material losses in metals are a central bottleneck in plasmonics for many applications. Here we propose and theoretically demonstrate that metal losses can be successfully mitigated with dielectric particles on metallic films, giving rise to hybrid dielectric-metal resonances. In the far field, they yield strong and efficient scattering, beyond even the theoretical limits of all-metal and all-d...

Fumed-Alumina-Derived Nanoporous Alumina as a New Low-k Dielectric Material for Microelectronics Packaging

Deformation and Grain Growth of Low-Temperature-Sintered High-Purity Alumina

9 = 0.6 I / s ' 7 = 6.0 0 7 = 2 4 i ti 3 = 6 0 Through close control over green-state powder processing, pure alumina ceramics of 0.5-pm grain size were obtained by sintering at 1250°C. The static grain growth of this material was modest at temperatures below 1300°C. However, dynamic grain growth occurred rapidly during superplastic deformation. Therefore, although the ultrafine-grained alumina...

Microstructure and mechanical properties of pressureless sintered alumina-silver composites

The silver toughened alumina ceramics, which were fabricated via a conventional ceramic processing route using commercially available alumina and silver oxide powders as the starting materials, exhibit a higher fracture toughness (6 to 9 MPamo.5) than the monolithic alumina ceramic ( 2.5 to 3.0 MPamo.5). The weak interfacial bonding between the silver inclusions and the alumina matrix is charac...

Dielectric Properties of Carbon Nanofibre/Alumina Composites

Carbon nanofibre (CNF)/Al2O3 composites with concentrations between 1 and 9 vol.% of CNF were prepared by the traditional ceramic 1 *Corresponding author. Tel/Fax: +34 985733644. E-mail address: [email protected] (J.L. Menendez)