Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/6827
Title: Comparison of two methods for coating piezoelectric crystals
Author: GOMES, MT
DUARTE, AC
OLIVEIRA, JP
Keywords: Quartz crystal microbalance
Coatings
Piezoelectric crystals
Issue Date: 1995
Publisher: Elsevier
Abstract: Quartz piezoelectric crystals were coated with triethanolamine using two procedures: spray and syringe methods. The reproducibility of both coating methods was evaluated comparing the relative standard deviation of batches of four crystals coated by each of the procedures. The relative standard deviation obtained with the spray method is a hyperbolic function of the coating frequency and is, at least, three times lower than the one calculated from results of the syringe method, which is not frequency dependent. An explanation for the poorer reproducibility of the syringe method is given, based on the radial sensitivity theory and the non-uniformity of the coating distribution over the crystal, as evidenced by microscopic photographs.
Peer review: yes
URI: http://hdl.handle.net/10773/6827
DOI: 10.1016/0003-2670(94)00361-O
ISSN: 0003-2670
Appears in Collections:DQ - Artigos

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