Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 Materials Science Poland

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

(0 0 2)-oriented growth and morphologies of ZnO thin films prepared by sol-gel method

Guo D., Ju Y., Fu C., Huang Z., Zhang L.

Materials Science Poland

2016

Vol. 34, No. 3

555--563

Zinc acetate was used as a starting material to prepare Zn-solutions from solvents and ligands with different boiling temperature. The ZnO thin films were prepared on Si(1 0 0) substrates by spin-coating method. The effect of baking temperature and boiling temperature of the solvents and ligands on their morphologies and orientation was investigated. The solvents and ligands with high boiling temperature were favorable for relaxation of mechanical stress to form the smooth ZnO thin films. As the solvents and ligands with low boiling temperature were used to prepare Zn-solutions, the prepared ZnO thin films showed (0 0 2) preferred orientation. As n-propanol, 2-methoxyethanol, 2-(methylamino)ethanol and monoethanolamine were used to prepare Zn-solutions, highly (0 0 2)-oriented ZnO thin films were formed by adjusting the baking temperature.

Relaxor characteristics of ferroelectric BaZr0.2Ti0.8O3 ceramics

Fu C., Pan F., Cai W., Deng X., Liu X.

Materials Science Poland

2009

Vol. 27, No. 3

891--897

The crystalline microstructure, surface morphology, and the dielectric properties of BaZr0.2Ti0.8O3 (BZT) ceramics are investigated. From the X-ray diffraction pattern, it is found that the c-axis lattice parameter of the BZT ceramics is greater than the a-axis one. The temperature dependence of the electric permittivity indicates that there exists a diffuse transition in BZT ceramics. According to a modified Curie-Weiss law, it is calculated that the diffuseness constant (?) equals 1.93. From the hysteresis loops, it is found that the remanent polarization (2Pr) and the coercive field (2EC) of BZT ceramics both increase as the applied maximum voltage increases.