Magnetoelectrets prepared by using temperature gradient method

Abstract

A novel Temperature Gradient method for preparation of magnetoelectret is proposed. Non uniform magnetic field and temperature gradient are expected to be the main cause for the formation of magnetoelectrets (MEs). Being bad conductors of heat, during their formation, there is a possibility for the existence of a temperature gradient along the dielectric electrode interface. In this condition, the motion of, molecules and charge carriers are dependent on Temperature Gradient in a preferred direction. To increase this temperature gradient on both sides of the sample novel method for the preparation of MEs is developed for the first time. For this method the special sample holders are designed in our laboratory. MEs are prepared in such a way that one surface is cooled and the other is heated, during the process. With the help of XRD analysis using Type-E orientation pattern and surface charge studies on magnetoelectrets, the two main causes Non uniform magnetic field and temperature gradient for the formation of magnetoelectrets (MEs), are authenticated experimentally.

Sensor de corrente baseado na tecnologia de magneto-piezoeletretos termoformados

“…Para o isolamento térmico, foi utilizado uma placa quadrada de Baquelite com 4.2 𝑐𝑚 com um pequeno orifício de 1.5 𝑐𝑚 de diâmetro, onde foi inserido o magneto-eletreto. Portanto, para o processo térmico, não foi utilizado o formato de serpentina como em Bhatnagar (1964) [101].…”