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Microfeeding with different ultrasonic nozzle designs

Microfeeding with different ultrasonic nozzle designs
Microfeeding with different ultrasonic nozzle designs
Microfeeding of dry powder excited by ultrasonic vibration makes use of relatively simple equipment and can be applied to solid freeforming and pharmaceutical dosing. The nozzle was a vertical glass capillary and four configurations for ultrasonic actuation were investigated: Type I had a piezoelectric transducer ring bonded to the base of a cylindrical water-containing vessel containing an axial nozzle; Type II had a piezoelectric transducer ring attached to the sidewall of the vessel; Type III used direct mechanical connection to the glass wall of the capillary to give nominally longitudinal vibration; and Type IV also used direct connection to the glass tube but arranged to give progressive wave vibration. The experimental results show that all four configurations realized powder microfeeding and dosing but the characteristics, in terms of minimum flow rate, dependence on voltage amplitude and uniformity of dose varied considerably. The discharge of particles was observed by a high-speed camera
ultrasonic, microfeeding, powder, longitudinal wave, progressive wave
0041-624X
514-521
Lu, Xuesong
e3eb4386-7dc9-417e-bd5c-bbdec78f7ec5
Yang, Shoufeng
e0018adf-8123-4a54-b8dd-306c10ca48f1
Evans, Julian R. G.
1e4ff64d-fdc6-460e-ae9f-f41746899f57
Lu, Xuesong
e3eb4386-7dc9-417e-bd5c-bbdec78f7ec5
Yang, Shoufeng
e0018adf-8123-4a54-b8dd-306c10ca48f1
Evans, Julian R. G.
1e4ff64d-fdc6-460e-ae9f-f41746899f57

Lu, Xuesong, Yang, Shoufeng and Evans, Julian R. G. (2009) Microfeeding with different ultrasonic nozzle designs. Ultrasonics, 49 (6-7), 514-521. (doi:10.1016/j.ultras.2009.01.003).

Record type: Article

Abstract

Microfeeding of dry powder excited by ultrasonic vibration makes use of relatively simple equipment and can be applied to solid freeforming and pharmaceutical dosing. The nozzle was a vertical glass capillary and four configurations for ultrasonic actuation were investigated: Type I had a piezoelectric transducer ring bonded to the base of a cylindrical water-containing vessel containing an axial nozzle; Type II had a piezoelectric transducer ring attached to the sidewall of the vessel; Type III used direct mechanical connection to the glass wall of the capillary to give nominally longitudinal vibration; and Type IV also used direct connection to the glass tube but arranged to give progressive wave vibration. The experimental results show that all four configurations realized powder microfeeding and dosing but the characteristics, in terms of minimum flow rate, dependence on voltage amplitude and uniformity of dose varied considerably. The discharge of particles was observed by a high-speed camera

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More information

Published date: June 2009
Keywords: ultrasonic, microfeeding, powder, longitudinal wave, progressive wave
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 165017
URI: https://eprints.soton.ac.uk/id/eprint/165017
ISSN: 0041-624X
PURE UUID: de40192d-9fa6-47d1-b0e9-dc399b592349
ORCID for Shoufeng Yang: ORCID iD orcid.org/0000-0002-3888-3211

Catalogue record

Date deposited: 08 Oct 2010 07:31
Last modified: 06 Jun 2018 12:33

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Contributors

Author: Xuesong Lu
Author: Shoufeng Yang ORCID iD
Author: Julian R. G. Evans

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