Acoustical and optical characterization of air entrapment in piezo-driven inkjet printheads

J. de Jong, M. Versluis, G. de Bruin, D. Lohse, H. Reinten, M. van den Berg, H. Wijshoff, N. de Jong

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

8 Citations (Scopus)
32 Downloads (Pure)


Air bubbles can cause nozzle failures in piezo-driven inkjet printheads [1]. The time development of the entrapped air bubbles has experimentally been studied [2]. It was found that the air bubble has a radius of 5μm just after the entrapment. The bubble then grows by rectified diffusion due to the applied pressure field, used for jetting droplets. Bjerknes forces drive the displacement of the air bubble. First, the bubble is pushed into the channel. After reaching the resonance size, given by the characteristic printhead frequency, the Bjerknes force reverses sign, pushing the air bubble towards the nozzle. At this time the air bubble has grown so large that it is not possible to jet it out, resulting in a nozzle failure.
Original languageEnglish
Title of host publicationIEEE Ultrasonics Symposium 2005
Place of PublicationPiscataway, NJ
Number of pages2
ISBN (Print)0-7803-9382-1
Publication statusPublished - 18 Sept 2005
EventIEEE Ultrasonics Symposium 2005 - Rotterdam, Netherlands
Duration: 18 Sept 200521 Sept 2005

Publication series

NameProceedings of the IEEE Ultrasonics Symposium
ISSN (Print)1051-0117


ConferenceIEEE Ultrasonics Symposium 2005


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