Article ID Journal Published Year Pages File Type
5462649 Materials Letters 2018 10 Pages PDF
Abstract
A novel microwave dielectric ceramic LiNb0.6Ti0.5O3 (LNT) with Ca substitutions LiNb0.6Ti(0.5−x)Ca1.231xO3 was synthesized by solid-state method. It was found that with Ca substitutions, the temperature coefficient of resonant frequency τƒ could be adjusted to zero, due to the appearance of the second phase Ca5Nb4Ti3O21. The τƒ of the Ca5Nb4Ti3O21 phase is −144.3 ppm/°C through the simulation and numerical value calculation. Furthermore, the LiNb0.6Ti(0.5−x)Ca1.231xO3 ceramic shows a higher dielectric constant εr and a denser microstructure. The LiNb0.6Ti(0.5−x)Ca1.231xO3 ceramic with x = 0.03 sintered at 1100 °C for 2 h shows excellent microwave dielectric properties: εr = 76.89, Q × ƒ = 4064 GHz, τƒ = 0.25 ppm/°C.
Related Topics
Physical Sciences and Engineering Materials Science Nanotechnology
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