Category MATS P23 Optimization of Electro Pulsing on 3Y-TZP Ceramic Water

Filter Sintering

Abstract This project includes the utilization of electro pulsing to optimize the

production of ceramic filters, specifically Yttria-Stabilized Tetragonal

Polycrystalline Zirconia (3Y-TZP). Due to the versatility of this ceramic,

pore sizes can be controlled to filter out particulates, bacteria, viruses,

and other pathogens. However, current ceramic sintering processes

require long sintering times and extensive energy costs when heating

furnaces at high temperatures. Furthermore, current ceramic water

filters are unable to attain the miniscule pore sizes required to filter

viruses. This study sought to shorten sintering time, reach a target pore

size of 20 nanometers, and achieve full density. The sintering process

was optimized by varying voltage, duration, and electro pulsing

frequency. At 40V, 10 microsecond pulses, and 70 Hz at 1400°C for

3000 minutes, the microstructure data showed that the pore size did

achieve 20 nanometers and full density. Activation energy of space-

charged clouds increased to slow the grain growth, which allowed full

density at a smaller pore size. In addition, the sintering time was

decreased from 7200 minutes to 3000 minutes, making the process

very cost-effective. The use of electro pulsing to produce ceramic water

filters is an efficient method and allows for potable drinking water to be

more accessible.

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