Strain Characteristics of PLZT-Based Ceramics for Actuator Applications
Round 1
Reviewer 1 Report
In this manuscript, an introduction to PLZT ceramics is given and the methods of strain measurement are included. The paper is well written and clear. However, the following suggestions should be considered.
1. Although being titled "Strain Characteristics of PLZT-based Ceramics for Actuator Applications," almost no mention of actuator applications is made in this manuscript.
2. For the sake of completeness, other strain measuring approaches should also be mentioned and contrasted with Michelson interferometry methods.
3. The meaning and structure of this article should be described in the introduction part.
4. There are few references in recent five years.
Author Response
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Author Response File: 
Author Response.docx
Reviewer 2 Report
This is a review paper regarding the PLZT materials with consideration of composition, microstructure, actuation strain. This looks sound, and is well organized to understand whole information of PLZT as a actuation material for readers. Therefore, it could be recommended to publish in the Actuators.
Additionally, if possible, the followings should be addressed when the PLZT is used as actuator material in real application.
1. In the Conclusion, the” galss ceramic” term as used. It is common word?
2. The temperature dependence of strain was described in the text. If the PLZT is used as a material of actuation system, the frequency dependence of strain should be also mentioned. The data of figure 8 is not enough to understand the change in strain with respect to frequency. Because the real piezoelectric actuator has been used in various system such as injection, dispenser, optical system, alignment system. In those systems, the operation frequency ranges from 0.01 Hz to 100 Hz.
3. In aging effect, the reversible and irreversible effects should be considered. In most case, the reversible effect is related to the oxygen vacancy action. In irreversible case, the micro cracking and microstructural evolution gat involved. But, in this study, reversible effect only put an emphasized.
4. Considering magnetic field effect (Fig. 4 and Figure 8), the reason should be explained regarding why the magnetic field application is required for piezoelectric PLZT actuator. In actual application, the application of electric field is required for the actuator. Any real applications should be described in the text on the occasion that the combined effect of electric and magnetic fields is on the PLZT.
Author Response
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Author Response File: Author Response.docx
Reviewer 3 Report
Referee Report on review paper “Strain Characteristics of PLZT-based Ceramics for Actuator Applications”
This is, of course, a work that could be recommended for publication, but only after some several improvements formulated below.
1. In the Introduction, it was useful in more detail the latest trends in research and applications of PLZT. See, for your information:
https://www.mdpi.com/search?q=PLZT
2. What is strange that the first chapter (Introduction) does not contain any supporting references. It shouldn't be like that.
3. Regarding porosity, I would like to know how detailed the pore structure was studied, whether the pores are subject to temporal evolution and how their size affects the considered functional properties.
4. List of the reference. The vast majority are quite old references, and in this regard, in the introduction, I would like to more clearly see the novelty and relevance of this work
Author Response
Please see the attachment.
Author Response File: Author Response.docx
Round 2
Reviewer 1 Report
The authors have addressed all the questions. In particular, the text added clarifies the proposal and makes the paper more accessible to abroad audience. I can now recommend its publication in Actuators.
Reviewer 3 Report
The manuscript is quite suitable for publication and may be accepted
