In this letter, we present a sapphire direct bonding method using plasma surface activation, hydrophilic pre-bonding, and high temperature annealing. Through the combination of sapphire inductively coupled plasma etching and the direct bonding process, a vacuum-sealed cavity employable for high temperature applications is achieved. Cross-sectional scanning electron microscopy (SEM) research of ...

Unpublished AIChE shall not be responsible for statements or opinions contained in papers or printed in its publications. Abstract This paper describes a novel calorimeter applicable for the simultaneous measurement of adsorption isotherms and the corresponding heats of adsorption. The calorimeter is based on a new metrological principle as a gas surrounding the adsorption vessel containing the...

The temperature of vapour-condenser below 0°C and the final pressure in the vacuum chamber below 0.61kPa during vacuum cooling were experimentally analysed in this paper. The temperature of vapour-condenser, -2 °C, -35°C, -39°C and -71°C, and the final pressure in the vacuum chamber, 0.3kPa, 0.4kPa, 0.5kPa and 0.61kPa, were chosen. The experimental results showed that the cooling rate varies wi...

Vacuum pump wear is the most prevalent failure mode of IBA Synthera® automated radiochemistry system. Rebuilding or replacing causes equipment downtime and increases radiation exposure service personnel. We built a dedicated test device to assess new rebuilt pumps prior installation, thus reducing during repairs. The Testbed incorporates microprocessor that actuates pump, valves, pressure senso...

Different kinds of freezing-point regulators were evaluated to expand the freezing point zone of large yellow croaker, and several treatment methods such as ordinary atmospheric pressure, vacuum environment and injection during the process of penetration were compared to reveal the relationship of diffusion velocities, diffusion time and freezing point of the large yellow croaker. Results obtai...

soil compaction can occur as a result of a number of factors. one of the most important factors is soil response to pressures imposed by wheels and soil engaging tools. this research investigated the effect of tyre load and inflation pressure on soil compaction-related factors. these factors include rut width, rut depth, cone index and horizontal force in different layers of soil profile. in th...

A miniature wall climbing robot equipped with two smart robotic feet (SRF) is developed and tested. It is controlled autonomously by a PIC16F876 microcontroller and a 6 volt power supply onboard. Each SRF contains a suction cup with a diameter of 40 mm, a vacuum pump, a pressure sensor, and a micro valve. The robot’s motion is driven by two servo motors which are electronically linked and synch...

Related Articles Microelectromechanical strain and pressure sensors based on electric field aligned carbon cone and carbon black particles in a silicone elastomer matrix J. Appl. Phys. 112, 094324 (2012) Wheatstone bridge piezoresistive sensing for bulk-mode micromechanical resonator Appl. Phys. Lett. 101, 193505 (2012) Distant mechanical sensors based on cholesteric liquid crystals Appl. Phys....