Pub Date : 2023-09-25DOI: 10.32523/ejpfm.2023070307
M. M. Kubenova, M. Kh. Balapanov, R. Kh. Ishembetov, K. A. Kuterbekov, R. F. Almukhametov, K. Zh. Bekmyrza, A. M. Kabyshev, R. Sh. Palymbetov, L. U. Taimuratova
In this work, we investigated the effect of nanostructuring on the thermoelectric and thermal properties of nonstoichiometric solid splavs doped with copper sulfides with potassium. The synthesized alloys K 0.01 Cu 1.96 S, K 0.02 Cu 1.95 S, K 0.03 Cu 1.94 S, K 0.04 Cu 1.93 S, K 0.05 Cu 1.94 S are nanocomposite. The crystallite sizes of the synthesized powder, as estimated from the half-width of X-ray diffraction lines, range from 7 to 180 nm. Sample K 0.01 Cu 1.96 S is a mixture of phases consisting of chalcocite Cu 2 S (82%), jarleite Cu 1.96 S (12%), anilite Cu 1.75 S (6%). The composition of samples K 0.02 Cu 1.95 S and K 0.03 Cu 1.94 S includes the most common phases of copper sulfides - chalcocite Cu 2 S , jarleite Cu 1.96 S, digenite Cu 1.80 S. Samples K 0.04 Cu 1.93 S and K 0.05 Cu 1.94 S consist of jarleite Cu 1.96 S, digenite Cu 1.80 S and potassium copper sulfide KCu 4 S 3 phases. In a practical sense, the extremely low thermal conductivity values (from 0.16 to 0.80 W/m · K) found in the range of 300–700 K for nanocomposite samples K 0.02 Cu 1.95 S and K 0.03 Cu 1.94 S are very favorable for achieving high thermoelectric figure of merit ZT material.
在这项工作中，我们研究了纳米结构对掺杂有钾的硫化铜的非化学计量固体薄片的热电和热性能的影响。合成的k0.01 Cu 1.96 S、k0.02 Cu 1.95 S、k0.03 Cu 1.94 S、k0.04 Cu 1.93 S、k0.05 Cu 1.94 S为纳米复合合金。根据x射线衍射线的半宽估计，合成粉末的晶粒尺寸在7 ~ 180 nm之间。样品k0.01 Cu 1.96 S是由辉铜矿cu2s(82%)、闪锌矿Cu 1.96 S(12%)和闪锌矿Cu 1.75 S(6%)组成的混合物。样品K 0.02 Cu 1.95 S和K 0.03 Cu 1.94 S的组成包括铜硫化物中最常见的相——辉钼矿Cu 2 S、钾辉钼矿Cu 1.96 S和钾辉钼矿Cu 1.80 S。样品K 0.04 Cu 1.93 S和K 0.05 Cu 1.94 S由钾辉钼矿Cu 1.96 S、钾辉钼矿Cu 1.80 S和钾硫化物KCu 4 S 3相组成。在实际应用中，K 0.02 Cu 1.95 S和K 0.03 Cu 1.94 S纳米复合材料在300-700 K范围内的极低导热系数(0.16 ~ 0.80 W/m·K)有利于获得高热电性能ZT材料。
{"title":"Thermal conductivity of new nanocomposite superionic semiconductors K0.01Cu1.96S, K0.02Cu1.95S, K0.03Cu1.94S, K0.04Cu1.93S, K0.05Cu1.94S","authors":"M. M. Kubenova, M. Kh. Balapanov, R. Kh. Ishembetov, K. A. Kuterbekov, R. F. Almukhametov, K. Zh. Bekmyrza, A. M. Kabyshev, R. Sh. Palymbetov, L. U. Taimuratova","doi":"10.32523/ejpfm.2023070307","DOIUrl":"https://doi.org/10.32523/ejpfm.2023070307","url":null,"abstract":"In this work, we investigated the effect of nanostructuring on the thermoelectric and thermal properties of nonstoichiometric solid splavs doped with copper sulfides with potassium. The synthesized alloys K 0.01 Cu 1.96 S, K 0.02 Cu 1.95 S, K 0.03 Cu 1.94 S, K 0.04 Cu 1.93 S, K 0.05 Cu 1.94 S are nanocomposite. The crystallite sizes of the synthesized powder, as estimated from the half-width of X-ray diffraction lines, range from 7 to 180 nm. Sample K 0.01 Cu 1.96 S is a mixture of phases consisting of chalcocite Cu 2 S (82%), jarleite Cu 1.96 S (12%), anilite Cu 1.75 S (6%). The composition of samples K 0.02 Cu 1.95 S and K 0.03 Cu 1.94 S includes the most common phases of copper sulfides - chalcocite Cu 2 S , jarleite Cu 1.96 S, digenite Cu 1.80 S. Samples K 0.04 Cu 1.93 S and K 0.05 Cu 1.94 S consist of jarleite Cu 1.96 S, digenite Cu 1.80 S and potassium copper sulfide KCu 4 S 3 phases. In a practical sense, the extremely low thermal conductivity values (from 0.16 to 0.80 W/m · K) found in the range of 300–700 K for nanocomposite samples K 0.02 Cu 1.95 S and K 0.03 Cu 1.94 S are very favorable for achieving high thermoelectric figure of merit ZT material.","PeriodicalId":36047,"journal":{"name":"Eurasian Journal of Physics and Functional Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135859788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-25DOI: 10.32523/ejpfm.2023070304
N. N. Bikkulova, A. Kh. Kutov, G. R. Akmanova, A. R. Kurbangulov, D. I. Safargaliev, L. V. Tsygankova
This paper presents the results of model calculations of the structure of the Cu-Te system at low temperatures, as well as the results of a study of the structure and phase transitions of synthesized non-stoichiometric compounds of copper tellurides. For the first time, using the USPEX evolutionary algorithm, model computer calculations of the search for stable phases of copper tellurides Cu n Te m (n,m = 1÷10) were carried out. At temperature T = 0 K and pressure p = 1 atm. As stable structures, the compositions Cu 5 Te 4 , Cu 3 Te 2 , and Cu 7 Te 4 were identified, which are indicated in the triclinic and monoclinic syngonies. Based on the study of the phase diagram, calorimetric measurements and X-ray diffraction studies of experimentally synthesized samples of copper telluride, it was found that the non-stoichiometric compositions Cu 1.96 Te, Cu 1.85 Te, Cu 1.80 Te and Cu 1.75 Te at room temperature are single-phase. The Cu 1.85 Te, Cu 1.80 Te, and Cu 1.75 Te compounds are described by hexagonal crystalline superstructures obtained on the basis of the Novotny phase for Cu 2 Te with different degrees of unit cell parameter multiplicity. Cu1.96Te at room temperature is indicated in an orthorhombic phase with lattice parameters that are also multiples of the unit cell parameters of the Novotny phase. At high temperatures, all compositions of Cu 2−x Te (x=0.04, 0.15, 0.20, 0.25) transform into high-temperature disordered FCC structures that exist up to their melting point. It is shown that in these compounds the transition of a low-temperature hexagonal and orthorhombic structure to a high-temperature FCC phase occurs through a series of polymorphic phase transformations.
本文介绍了低温下Cu-Te体系结构的模型计算结果，以及合成的非化学计量碲化铜化合物的结构和相变的研究结果。利用USPEX进化算法，首次进行了寻找碲化铜Cu n Te m (n,m = 1÷10)稳定相的模型计算机计算。温度T = 0k，压力p = 1atm。Cu 5 Te 4、Cu 3 Te 2和Cu 7 Te 4是稳定的结构，具有三斜和单斜的结构。通过对实验合成的碲化铜样品的相图、量热测量和x射线衍射研究，发现室温下Cu 1.96 Te、Cu 1.85 Te、Cu 1.80 Te和Cu 1.75 Te的非化学计量成分为单相。Cu - 1.85 Te、Cu - 1.80 Te和Cu - 1.75 Te化合物由具有不同程度单位胞参数多重性的Cu - 2te的Novotny相得到的六方晶体超结构来描述。Cu1.96Te在室温下显示为正交相，晶格参数也是Novotny相的单位胞参数的倍数。在高温下，Cu 2−x Te (x=0.04, 0.15, 0.20, 0.25)的所有组分转变为高温无序FCC结构，直至其熔点。结果表明，在这些化合物中，低温六方和正交结构通过一系列多晶相转变发生向高温FCC相的转变。
{"title":"Phase transitions in copper tellurides","authors":"N. N. Bikkulova, A. Kh. Kutov, G. R. Akmanova, A. R. Kurbangulov, D. I. Safargaliev, L. V. Tsygankova","doi":"10.32523/ejpfm.2023070304","DOIUrl":"https://doi.org/10.32523/ejpfm.2023070304","url":null,"abstract":"This paper presents the results of model calculations of the structure of the Cu-Te system at low temperatures, as well as the results of a study of the structure and phase transitions of synthesized non-stoichiometric compounds of copper tellurides. For the first time, using the USPEX evolutionary algorithm, model computer calculations of the search for stable phases of copper tellurides Cu n Te m (n,m = 1÷10) were carried out. At temperature T = 0 K and pressure p = 1 atm. As stable structures, the compositions Cu 5 Te 4 , Cu 3 Te 2 , and Cu 7 Te 4 were identified, which are indicated in the triclinic and monoclinic syngonies. Based on the study of the phase diagram, calorimetric measurements and X-ray diffraction studies of experimentally synthesized samples of copper telluride, it was found that the non-stoichiometric compositions Cu 1.96 Te, Cu 1.85 Te, Cu 1.80 Te and Cu 1.75 Te at room temperature are single-phase. The Cu 1.85 Te, Cu 1.80 Te, and Cu 1.75 Te compounds are described by hexagonal crystalline superstructures obtained on the basis of the Novotny phase for Cu 2 Te with different degrees of unit cell parameter multiplicity. Cu1.96Te at room temperature is indicated in an orthorhombic phase with lattice parameters that are also multiples of the unit cell parameters of the Novotny phase. At high temperatures, all compositions of Cu 2−x Te (x=0.04, 0.15, 0.20, 0.25) transform into high-temperature disordered FCC structures that exist up to their melting point. It is shown that in these compounds the transition of a low-temperature hexagonal and orthorhombic structure to a high-temperature FCC phase occurs through a series of polymorphic phase transformations.","PeriodicalId":36047,"journal":{"name":"Eurasian Journal of Physics and Functional Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135814949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-26DOI: 10.32523/ejpfm.2023070105
M. Kubenova, K. Kuterbekov, M. Balapanov, R. Ishembetov, B. Akhmetgaliev, A. Kabyshev, K. Bekmyrza, M. Zeleev, R. Palymbetov, B. Baikhozhaeva
{"title":"Thermal and electrical properties of nanocrystalline superionic NaxCu1.75S (x=0.1, 0.15, 0.2, 25) compounds","authors":"M. Kubenova, K. Kuterbekov, M. Balapanov, R. Ishembetov, B. Akhmetgaliev, A. Kabyshev, K. Bekmyrza, M. Zeleev, R. Palymbetov, B. Baikhozhaeva","doi":"10.32523/ejpfm.2023070105","DOIUrl":"https://doi.org/10.32523/ejpfm.2023070105","url":null,"abstract":"","PeriodicalId":36047,"journal":{"name":"Eurasian Journal of Physics and Functional Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44697985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-26DOI: 10.32523/ejpfm.2023070101
S. Afroze, M. S. Reza, M. R. Somalu, A. Azad
{"title":"Super–protonic conductors for solid acid fuel cells (SAFCs): a review","authors":"S. Afroze, M. S. Reza, M. R. Somalu, A. Azad","doi":"10.32523/ejpfm.2023070101","DOIUrl":"https://doi.org/10.32523/ejpfm.2023070101","url":null,"abstract":"","PeriodicalId":36047,"journal":{"name":"Eurasian Journal of Physics and Functional Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41259092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-26DOI: 10.32523/ejpfm.2023070103
T. Koketai, A. Strelkova, A. Zhunusbekov, Z. Karipbayev, L. Lisitsyna, A.M. Chakin
{"title":"Luminescent properties of BaxMg(2−x)F4:W ceramics","authors":"T. Koketai, A. Strelkova, A. Zhunusbekov, Z. Karipbayev, L. Lisitsyna, A.M. Chakin","doi":"10.32523/ejpfm.2023070103","DOIUrl":"https://doi.org/10.32523/ejpfm.2023070103","url":null,"abstract":"","PeriodicalId":36047,"journal":{"name":"Eurasian Journal of Physics and Functional Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45432113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-26DOI: 10.32523/ejpfm.2023070104
S. Khan, S. Patel, P. Shukla, R. Kumar, R. Dixit
{"title":"Synthesis of silver nanoparticles by green method using ligustrum sinense to study their structural and photoluminescence properties","authors":"S. Khan, S. Patel, P. Shukla, R. Kumar, R. Dixit","doi":"10.32523/ejpfm.2023070104","DOIUrl":"https://doi.org/10.32523/ejpfm.2023070104","url":null,"abstract":"","PeriodicalId":36047,"journal":{"name":"Eurasian Journal of Physics and Functional Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43124192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-26DOI: 10.32523/ejpfm.2023070102
T. Nurakhmetov, T. Alibay, S. Pazylbek, A. Zhunusbekov, B. Sadykova, D. Tolekov, R. K. Shamieva, A.S. Nurpeissov
{"title":"Electron-hole trapping centers in Na2SO4 with a transition metal impurity Mn","authors":"T. Nurakhmetov, T. Alibay, S. Pazylbek, A. Zhunusbekov, B. Sadykova, D. Tolekov, R. K. Shamieva, A.S. Nurpeissov","doi":"10.32523/ejpfm.2023070102","DOIUrl":"https://doi.org/10.32523/ejpfm.2023070102","url":null,"abstract":"","PeriodicalId":36047,"journal":{"name":"Eurasian Journal of Physics and Functional Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49432213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-25DOI: 10.32523/ejpfm.2022060401
Yu. M. Tashmetov, B. Yuldashev, S. Adizov, N. B. Ismatov, S. Pidaev, S. Kichanov, B. Abdurakhimov, D. Kozlenko, N. Dvurechenskaya, I. Saprykina
{"title":"Non-destructive structural studies of coins from the Uzundara Fortress using X-ray diffraction and neutron tomography","authors":"Yu. M. Tashmetov, B. Yuldashev, S. Adizov, N. B. Ismatov, S. Pidaev, S. Kichanov, B. Abdurakhimov, D. Kozlenko, N. Dvurechenskaya, I. Saprykina","doi":"10.32523/ejpfm.2022060401","DOIUrl":"https://doi.org/10.32523/ejpfm.2022060401","url":null,"abstract":"","PeriodicalId":36047,"journal":{"name":"Eurasian Journal of Physics and Functional Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44000937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-25DOI: 10.32523/ejpfm.2022060403
B. Baimurzinova, D. Tsirkov
{"title":"Analysis procedures in deriving of the differential cross section of the reaction pp ! {pp}sp0 at energies 1.6–2.4 GeV","authors":"B. Baimurzinova, D. Tsirkov","doi":"10.32523/ejpfm.2022060403","DOIUrl":"https://doi.org/10.32523/ejpfm.2022060403","url":null,"abstract":"","PeriodicalId":36047,"journal":{"name":"Eurasian Journal of Physics and Functional Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45284489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-25DOI: 10.32523/ejpfm.2022060404
R. J. Bashirov, F. Rasulov
{"title":"Formation of high strength and corrosion resistance composition cover on the surface of casting","authors":"R. J. Bashirov, F. Rasulov","doi":"10.32523/ejpfm.2022060404","DOIUrl":"https://doi.org/10.32523/ejpfm.2022060404","url":null,"abstract":"","PeriodicalId":36047,"journal":{"name":"Eurasian Journal of Physics and Functional Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44781874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：