Single crystals of pure and picric acid doped thiourea were grown by slow evaporation technique. Single crystal structure was determined by X-ray diffraction data and it reveals that the crystal belongs to orthorhombic crystal system with space group of Pnma. The dielectric constant and dielectric loss were calculated by varying frequencies at different temperatureThemicrohardness test reveals ...

High density sodium lithium niobate lead free ceramics near the morphtropic phase boundary [NaxLi1−xNbO3, (LNN), x=0.12] were prepared by the solid state reaction method. XRD patterns showed that the lattice structures were changed after polarization. The temperature dependence of the dielectric constant and dielectric loss, pyroelectric coefficient and DSC curves of LNN ceramics showed that th...

Relaxing the assumption of an “infinite and homogenous background,” the dielectric response function of one-dimensional semiconducting nanowires embedded in a dielectric environment is calculated. It is shown that a high-κ (higher than semiconductor dielectric constant) dielectric environment reduces the screening by the free carriers inside the nanostructure, whereas a low dielectric constant ...

217 Abstract—As silicon devices shrink and their density increases, the low dielectric constant materials instead of SiO 2 film is required. SiOC film as low-k films was deposited by the capacitively coupled plasma chemical vapor deposition and then annealed at 300~500 ℃ to find out the properties of the dependence on the temperature and polarity. This study researched the dielectric constant u...

Studies of Metal–insulator–metal (MIM) capacitors having high-κ La2O3\HfO2 dielectric stacks are fabricated using Pulse Laser Deposition (PLD) is carried out. Nano-sized La2O3\HfO2 dielectric stacks are deposited using PLD system under optimized pressure, substrate temperature and numbers of shots inside argon ambient chamber. The morphology of dielectric stacks is examined using AFM and the th...

This paper presents a simple method for determining the dielectric constant of microwave PCB substrates. In the presented method, a bandpass microstrip filter on the PCB substrate with a user-predicted dielectric constant value is designed for a given center frequency, and it is implemented. The simulation results of the designed bandpass filter are obtained by the help of electromagnetic analy...

The real dielectric constant e' and loss factor tan were studied as function of frequency J, temperature T and composition x for a series of samples of BaCo2~Zn~Fe12-2~ Dig hexagonal ferrite system with x = 0A, 0.8, 12, 16 and 2 prepared using the usual ceramic technique. The experimental results indicated that e' and tan decrease as the frequency increases and temperature decreases The studied...

Comparative studies of Cerium and Zirconium doped Barium Titanate S.N. Rahman, N. Khatun, S. Islam, N.A. Ahmed Industrial Physics Division, BCSIR Laboratories, Dhaka. Bangladesh Council of Scientific and Industrial Research (BCSIR) Dr. Kudrat-i-Khuda Road, Dhaka-1205, BANGLADESH. __________________________________________________________________________________________ Abstract: Comparative inv...