3D打印英文文献+翻译.docx

1、3D打印英文文献+翻译Journal of the European Ceramic Society 31 (2011) 25432550Inkjet printing ceramics: From drops to solidB. DerbySchool of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, UKAvailable online 16 February 2011Abstract Inkjet printing is a powerful microfabrication tool th

2、at has been applied to the manufacture of ceramic components. To successfully fabricate ceramic objects a number of conditions must be satisfied concerning fluid properties and drop placement accuracy. It has been proposed that fluids are printable within the bounds 1 Z 2 for stable drop generation.

3、19 Reis extended this through numerical simulation and proposed the following range, 10 Z 1, for stable drop formation.20 If Z 10, droplets are accompanied by unwanted satellite drops. Jang et al. studied the DOD printability of a number of fluid mixtures of ethanol, water and ethylene glycol. Throu

4、gh this they explored a range of values of Oh and determined that the range of printability wasFig. 1. Fromms parameter Z (Z = 1/Oh) influences the printability of fluids. Dashed lines identify the limits for printability proposed by Reis et al.20 Experi-mental points are plotted for a number of cer

5、amic suspensions/inks: grey symbols indicate successful inkjet printing, black symbols indicate that no drops were formed, and white symbols indicate the presence of satellite drops along with the main printed drop.4 Z 14,21 which is very similar to that determined by Reiss numerical simulation.Ther

6、e is now a substantial body of literature describing the inkjet printing of a number of ceramic suspensions and other fluids for non-graphics applications; unfortunately not all publications report sufficient information on the rheologi-cal properties of the ceramic suspensions to test this proposed

7、 criterion for printability in all cases. Fig. 1 presents such data that either reported the value of Oh (or Z) or reported sufficient data that it is easily calculated. The vertical dashed lines on the figure at Oh = 1 and Oh = 10 represent the limits for stable inkjet printing calculated by Reis.2

8、0 The experimental data is presented from eight fluid systems with a grey symbol indicat-ing the successful printing of individual drops, a black symbol indicates that fluids with these properties could not be printed, and finally a white symbol shows the cases where a fluid drop was successfully ej

9、ected but accompanied by one or more satel-lite drops. It is useful to separate these data into two sets: fluid systems 16 were delivered using piezoelectric DOD printers, while fluid systems 7 and 8 were delivered using a thermal DOD printer. The data obtained from experiments using piezoelectric D

10、OD printing shows reasonably good agreement with Reiss model, however that obtained in the one study using a thermal DOD printer shows very poor agreement,17 at least with the upper bound for the prediction of the onset of satellite drop for-mation. zkol considered that one reason for the discrepanc

11、y between Reiss prediction and their results could be the differ-ence in actuation between piezoelectric and thermal DOD inkjet droplet generators.17The hypothesis that changes in actuation explain the dif-ferent behaviour observed between thermal and piezoelectric DOD inkjet printing is supported b

12、y an experimental study of drop and satellite formation in a piezoelectric DOD printer by Dong et al.22 They found that the drop formation mechanism and the conditions under which a given fluid formed satellites is also controlled by the shape and amplitude of the drivingpulse applied to the piezoelectric actuator. The driving pulsein DOD printing is also known to control both the size of the ejected drop and its velocity.12,22,23 Reis demonstrated that forthe formation of drops using highly loaded ceramic suspensions, acoustic phenomena are important and that there are m