SAW gas sensor piezoelectric material properties
Posted Feb 22, 2021, 12:02 PM EST 3 Replies
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In the example "saw gas sensor" present in the comsol application library, the piezoelectric material is a YZ lithium niobate. The material properties are taken from (https://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=1426375)
I have few questions:
1) For example c33 = 242 GPa but why in the matrix (see file attached pag4) is in the position of c11 value. I don't understand the order.
2) Why in the piezoelectric material interface, under coordinate systems, "Material XZ plane system" is selected? If the properties are already related to the YZ LiNbO3, I think that "global coordinates" has to selected, or I am wrong?
3) Why "Material XZ plane system" and not "Material YZ plane system" is selected?