Abstract In this project, nano-ZrO2 particles were dispersed in aluminum powder by a Y-shape mixer. The particle size of ZrO2 powder was < 40 nm and the amount of ZrO2 reinforcement varies from 3 to 15%.The mixed powders were compacted .Subsequently the compacted discs were sintered both in the microwave oven and in the conventional muffle furnace .Using microwave –assisted sintering method led...

Understanding the flow fields at the micro-scale is a key to develop methods of successfully mixing fluids for micro-scale applications. This paper investigates flow characteristics and mixing of three different geometries in micro-channel. A Circular groove micro mixer has been designed and simulated. One such channel is shown in Figure1. The geometry of the channels taken was rectangular with...

this paper presents a design of an uwb downconversion integrated cmos resistive ring mixer with linear voltage regulator (lvr), to supply required biasing voltages for the mixer section. the designed mixer circuit has been optimized for using in heart rate extraction system with microwave doppler radar at 2.4ghz frequency. this mixer needs 2 dc bias voltages equal to 0.5 and 1 volts for its bes...

Droplet micro-mixing is a critical aspect limiting the accuracy of chemical analysis and quality drug screening, requiring efficient mixing target concentrations in limited volume. In this paper, ternary dilute solute lattice Boltzmann model used to study processes mechanisms solutes inside Janus droplets. The influence three factors including droplet velocity, tilt angle volume ratio on effici...

Motion in micro-channels of passive flow micro-fluidic systems can be controlled by proper design and estimated by careful modeling. We report on methods to describe the flow rate as function of time in a passive pump driven micro-fluidic system. The model considers the surface energy present in small droplets, which prompts their shrinkage and induces flow. The droplet geometries are controlle...

The effect of an in-mold static mixer on orientation fiber-reinforced polypropylene (PP) was explored within the injection molding process. Several mold geometries and helical designs were assessed via simulation to identify mixing ability potential fiber orientation. It found that mixers runner segment could successfully mix polymer randomize fibers but alignment reduction quickly recovered. I...

Radio astronomy requires SIS mixers and receivers with very high stability. The goal for the total power stability of the ALMA receivers is 1x10 over 1 second. The SIS mixer is one of the most critical components in the receiver signal chain determining stability. Most changes in mixer noise and gain are due to variations of its operating conditions. In this paper we present accurate measuremen...

Frequency translation which converts the original signal to a much lower baseband frequency signal is a vital role in the RF receiver design. In this work, a high linear down-conversion Gilbert cell mixer at 100MHz is designed using TSMC 0.18μm RF CMOS process. Linearity is an important performance measure in RF circuits particularly in mixer design. In this paper, the two types of linearizatio...

This paper presents the design methodologies and implementation of HEMT RF down conversion Mixer for 1.8 GHz to 5 GHz wireless and mobile applications.In many recent receiver designs, the front-end mixer determines the receiver's sensitivity and better isolation for the system. Single transistor mixer are developed for such an applications i.e. a Common source configuration, where the LO signal...

Achieving the fast mixing requirements posed by the chemical, biological, and life science community for confined microchannel flows remains an engineering challenge. The viscous and surface tension forces that dominate conventional micro-flows undermine fast, efficient mixing. By increasing the collisional velocity of reagent droplets, inertia can be exploited to increase mixing rates. This pa...