Kostja Makarovič, Darko Belavič, Barbara Malič, Andreja Benčan, Franci Kovač and Janez Holc
The purpose of this study is the design, fabrication and evaluation of a miniature ozone generator using the principle of electric discharge are presented.
Abstract
Purpose
The purpose of this study is the design, fabrication and evaluation of a miniature ozone generator using the principle of electric discharge are presented.
Design/methodology/approach
The device was fabricated using a low-temperature co-fired ceramics (LTCC) technology, by which a multilayered ceramic structure with integrated electrodes, buried channels and cavities in micro and millimeter scales was realized.
Findings
The developed ozone generator with the dimensions of 63.6 × 41.8 × 1.3 mm produces approximately 1 vol. % of ozone in oxygen flow of 15 ml/min, at an applied voltage of 7 kV.
Originality/value
A miniature ozone generator, manufactured in LTCC technology, produces high amount of ozone and more than it is described in the available references or in datasheets of commercial devices of similar size.
Details
Keywords
Darko Belavic, Marko Hrovat, Marina Santo Zarnik, Andreja Bencan, Walter Smetana, Roland Reicher and Heinz Homolka
Strain gauges can be realised by printing and firing thick‐film resistors on ceramic substrates that are usually based on alumina. However, sensing elements made on some other…
Abstract
Strain gauges can be realised by printing and firing thick‐film resistors on ceramic substrates that are usually based on alumina. However, sensing elements made on some other substrates – tetragonal zirconia or stainless steel – would exhibit some improved characteristics, either due to a lower modulus of elasticity or a higher mechanical strength. As thick‐film resistors are developed for firing on alumina substrates their compatibility and possible interactions with other kinds of substrates have to be evaluated. The sheet resistivities and noise indices of the resistors were comparable, whereas the gauge factors were lower for the dielectric‐on‐steel substrates. The temperature coefficients of resistivity (TCR) of the resistors on the ZrO2 and dielectric‐on‐steel substrates were higher than the TCRs on the alumina substrates, which was attributed to the higher thermal expansion coefficient of the tetragonal zirconia and the stainless steel.