Optimized Strain Response in (Co_0.5Nb_0.5)⁴⁺-Doped 76Bi_0.5Na_0.5TiO₃-24SrTiO₃ Relaxors

Round 1

Reviewer 1 Report

The paper presents the results of a study on strain response in (Co_0.5Nb_0.5)⁴⁺ doped 76Bi0.5Na0.5TiO3-12 24SrTiO3 (BNST24) relaxors fabricated though a solid-state route. The results show that that CN doping has shifted the T_NR-ER at room temperature and induced an ergodic relaxor state in BNST24-xCN (x≥0.02), contributing to an enhanced strain value and electrostrictive effect. Thus, the study demonstrates that appropriate CN content can lead to an effective balance between high strain and low hysteresis of ceramic material, and thus, further research could be performed to develop high-precision actuator applications.

 

The article is of interest of Coatings journal, and minor revision may be done, as follows:

- Conclusion could be developed to highlight all aspects envisaged presented in the paper (e.g. including structural and morphological transformations);

- minor editing corrections:

- fig. 5.e – caption of the current axis is written backwards;

- Lines 108, 199, 202,205, 219, 220, 242 (the letters size of have to be appropriate).

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Author Response

Dear  Reviewer:

Thank you very much for your useful comments/suggestions regarding our manuscript. We have seriously considered all the suggestions/comments and made necessary changes. Please see the attachment for details.

Author Response File: Author Response.docx

Reviewer 2 Report

Although the paper is significant, there are several issues many missing parts should be addressed before decision , that I recommend major revision

1. Please, check the errors/typos throughout manuscript

2. Article structure and references should be checked according to journal standards.

3. Qualify of images should be improve according to journal standards.

4 Introduction section lacks suitable references and information. Kindly add some more relevant information and cite articles in introduction section

 

5. As of now, the introduction section contains several small paragraphs. Combine some paragraphs and make just 3 paragraphs. 

 English very difficult to understand/incomprehensible

Author Response

Dear  Reviewer:

Thank you very much for your useful comments/suggestions regarding our manuscript. We have seriously considered all the suggestions/comments and made necessary changes. Please see the attachment for details.

Author Response File: Author Response.pdf

Reviewer 3 Report

In this paper is realized a study regarding the ceramic materials.  Demonstrate how to obtain a ceramic with high stain and low hysteresis by improving the electrostrictive effect and develop an ergodic relaxation phase at ambient conditions. In this study, (Co0.5Nb0.5)⁴⁺ doped 76Bi0.5Na0.5TiO3-24SrTiO3 (BNST24) relaxors were fabricated though a solid-state route. I was adjusted by (Co0.5Nb0.5)⁴⁺ doping in BNST24 to effectively tune TNR-ER and Td close to ambient temperature, which contributed to a shift into the ergodic relaxor state and enhanced the electrostrictive effect at ambient temperature.

The paper presents how the materials were obtained and XRD and SEM characterizations.

Overall the paper is well organized. The paper is well written and presented while its theoretical foundation has an interesting novelty. The present work’ connection with the open literature background is well and adequately justified. The introduction should be improved with more study and clearly point out your contribution, before start with the other sections.

I suggest the paper to be improved with some comparisons from the literature or other studies if possible.

My specific comments are:

-         - At page 4,  “x” what means exactly? xCN?

-          -What means CN=?

-         - I suggest you to introduce a list of abbreviations explained at the end o paper!

-        -  Figure 3 b), what kind of picture it is? SEM?

 

Author Response

Dear  Reviewer:

Thank you very much for your useful comments/suggestions regarding our manuscript. We have seriously considered all the suggestions/comments and made necessary changes. Please see the attachment for details.

Author Response File: Author Response.docx