Solar container dielectric glass ceramics english translation

What is the dielectric constant of glass–ceramics at 1000 °C?

The glass–ceramics heat-treated at 1000 °C for 2 h exhibited dielectric losses between 0.005 and 0.02. A 0.2 mol% MnO 2 addition gave the highest dielectric constant of 380 at room temperature. Recently, Harizanova et al. prepared BaTiO 3- based glass–ceramics using an alkali-rich aluminoborosilicate glass composition given in Table 10.1.

Why is glass a dielectric material?

Glass is a dielectric material, meaning that when an alternating electric field is applied, part of the energy is converted into heat, causing dielectric loss. This loss depends on the dielectric properties of the glass, specifically the dielectric constant and the dielectric loss tangent (tanδ).

Are glass-ceramic materials dielectric breakdown destructive?

In comparison with current glass insulators, the glass-ceramic materials dielectric breakdown is not as destructive as the case of glass insulators [ 39 ], where the explosive breakage of the insulator occurs.

How can BST-based glass–ceramics improve microstructures and dielectric properties?

Chen et al. reported improved microstructures and dielectric properties of BST-based glass–ceramics by adding AlF 3 and MnO 2 to the base glass composition. The glass–ceramics heat-treated at 1000 °C for 2 h exhibited controlled crystallization with low dielectric losses (0.02–0.03).

Do glass-ceramic materials have similar dielectric strength at room temperature?

Now, dielectric breakdown at room temperature for anorthite-based glass-ceramic is also tested in order to compare them, achieving a dielectric strength >57 kV/mm. Therefore, both glass-ceramic materials present similar dielectric strength at room temperature, due probably to the similar composition and micro-nanostructure.

What are the electrical conductivity and dielectric properties of glass–ceramics?

The electrical conductivity and dielectric properties of the glass–ceramics were determined over the range −170 °C to 97 °C at frequencies from 0.1 to 100 kHz. The room temperature dielectric constant was around 40 at 100 kHz.