Thermal Conductivity of Yttria-Gadolinia Solid Solution Optical Ceramics in the Temperature Range 50–300 K
, Timofey Evstropov 1, Dmitry Permin 1,2, Olga Postnikova 1,2, Alexander Praded 3 and Pavel Popov 3
Round 1
Reviewer 1 Report
The manuscript by Balabanov et al reports on the preparation and characterization of dense translucent ceramics of solid solutions (Y1-xGdx)2O3 starting from powders prepared by a flame spray pyrolysis methods. Authors determine and discuss the values of thermal conductivity for the prepared materials. This type of ceramic materials are of interest for the creation of active media for lasers. I consider the manuscript of interest and worth of publication, but I have some comments for authors
In line 76 authors introduce the term FSP, as it is the first time authors are using it, please explain it (flame spay pyrolysis)
In section 2, first paragraph authors compare FSP and SHS. Did you perform any experiment under SHS conditions in this work? If this is not the case, please do not include this in section 2 but in the introduction.
Did you study the effect of pressure during sintering in the final products?
Author Response
Point 1: In line 76 authors introduce the term FSP, as it is the first time authors are using it, please explain it (flame spay pyrolysis)
Response 1: Thank you for the suggestion. We have added an FSP extension when first mentioned in the text.
Point 2: In section 2, first paragraph authors compare FSP and SHS. Did you perform any experiment under SHS conditions in this work? If this is not the case, please do not include this in section 2 but in the introduction.
Response 2: We have been doing SHS for a long time, but we have not done systematic research on this system. So, according to your suggestion, we moved this paragraph to the introduction.
Point 3: Did you study the effect of pressure during sintering in the final products?
Response 3: We did not study the effect of pressure during sintering. We applied the maximum pressure available on our press.
Grammatical and typographical errors in the whole manuscript have been corrected.
Thank you for comments and appreciation of the work.
Reviewer 2 Report
This article is comprehensive, logically organized, and contains valuable information on the thermal conductivity of Yttria-Gadolinia solid solution optical ceramics in the temperature range 50-300°K. The authors did excellent research on investigating the thermal conductivity of translucent (Y1-xGdx)2O3, flame-spray pyrolysis from aqueous glycine-nitrate precursors, (where 0 ≤ x ≤1) solid solution ceramics in the temperature range from 50 to 300°K. The authors demonstrated that the in the range of solid solution ceramic compositions 0.2 ≤ x ≤ 0.7, the thermal conductivity is practically unchanged and close to the value k ≈ 5 W/(m K) at 300°K. This manuscript does not contain much of an error analysis on material performance which is highly required for readability purposes. The authors presented the XRD densities and thermal conductivity of solid solutions in Figures 2 and 3. It is suggested the authors should place the error bars of these plots for reliability and readability of the present research. The submitted manuscript has significant scientific insights and the conclusions are soundly supported by the experimental data. However, the present submission requires minor revisions before being considered for publication in the Special Issue: Oxide Optical Ceramics and Precursor Powders Preparation for Luminescence and Laser Applications in the esteemed Inorganics in its current condition.
Author Response
Point 1: This manuscript does not contain much of an error analysis on material performance which is highly required for readability purposes. The authors presented the XRD densities and thermal conductivity of solid solutions in Figures 2 and 3. It is suggested the authors should place the error bars of these plots for reliability and readability of the present research.
Response 1: Thank you for the suggestion. We have added the error bars in Figures 2 and 3. The XRD density measurement error is smaller than the point size.
Grammatical and typographical errors in the whole manuscript have been corrected.
Thank you for comments and appreciation of the work.
