Materials Science-Poland最新文献

Structure and Ionic Conductivity of Ga and Nb Dual Doped LLZO Synthesized by Sol-Gel Method 溶胶-凝胶法合成Ga和Nb双掺杂LLZO的结构和离子电导率

IF 1.1 4区材料科学

Materials Science-Poland Pub Date : 2023-09-01 DOI: 10.5755/j02.ms.34240

Jun Li, Fuzhong Wang, Leichao Meng, Tao Gao, Bo Liang, Hang Zhang, Meili Cui, Xinxin Lu, Ying Cao, Jiyong Chen

{"title":"Structure and Ionic Conductivity of Ga and Nb Dual Doped LLZO Synthesized by Sol-Gel Method","authors":"Jun Li, Fuzhong Wang, Leichao Meng, Tao Gao, Bo Liang, Hang Zhang, Meili Cui, Xinxin Lu, Ying Cao, Jiyong Chen","doi":"10.5755/j02.ms.34240","DOIUrl":"https://doi.org/10.5755/j02.ms.34240","url":null,"abstract":"More and more attention has been focused on Li7La3Zr2O12 (LLZO) because of the high ionic conductivity and excellent chemical stability. It is great significance to find suitable dopants for locking cubic LLZO and improving the conductivity of Li+ ions. The uniform nano powder can be obtained by the sol gel synthetic method, which is conducive to maintaining high sintering activity. In this work, Ga and Nb dual doped LLZO solid electrolyte powders were synthesized via sol gel method, and Ga and Nb dual doped LLZO solid electrolyte ceramic were obtained via traditional solid state sintering method. The phase and microstructure of Ga and Nb co-doped LLZO solid electrolyte were analyzed by combine X-ray diffraction with scanning electron microscope. The impedance of Ga and Nb dual doped LLZO (Li6.8-3xGaxLa3Zr1.8Nb0.2O12 (0≤x≤0.3)) solid electrolyte was measured by the electrochemical workstation, and then the conductivity was calculated. The results show that when the doping amount of Ga is x=0.2, it is a pure cubic LLZO structure with the highest conductivity value of 3.7×10-4 S cm-1 (tested at room temperature) due to the sample has a high relative density and reaches the optimal Li+ vacancy concentration.","PeriodicalId":49875,"journal":{"name":"Materials Science-Poland","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44313661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nature-inspired Apatite Production: Steam Processing of Calcium Carbonate and Tricalcium Phosphate Nanosized Powder Blends 自然启发的磷灰石生产:碳酸钙和磷酸三钙纳米粉末混合物的蒸汽加工

IF 1.1 4区材料科学

Materials Science-Poland Pub Date : 2023-08-24 DOI: 10.5755/j02.ms.32132

Aiga Anna Joksa, K. Gross

引用次数: 0

Effects of the Growth Rate on the High-temperature Tensile Properties and Micro-organization of Directionally Solidified Ti-44Al-9Nb-1Cr-0.2W-0.2Y Alloys 生长速率对定向凝固Ti-44Al-9Nb-1Cr-0.2W-0.2Y合金高温拉伸性能和微观组织的影响

IF 1.1 4区材料科学

Materials Science-Poland Pub Date : 2023-08-24 DOI: 10.5755/j02.ms.30647

Yao Huang, Zhuhang Jiang, Renheng Han, Chengzhi Zhao, Hexin Zhang

{"title":"Effects of the Growth Rate on the High-temperature Tensile Properties and Micro-organization of Directionally Solidified Ti-44Al-9Nb-1Cr-0.2W-0.2Y Alloys","authors":"Yao Huang, Zhuhang Jiang, Renheng Han, Chengzhi Zhao, Hexin Zhang","doi":"10.5755/j02.ms.30647","DOIUrl":"https://doi.org/10.5755/j02.ms.30647","url":null,"abstract":"In this experiment, Ti-44Al-9Nb-1Cr-0.2W-0.2Y alloy was prepared by the directional solidification method. The effect of different growth rates on tensile properties and microstructure orientation at high temperature was studied. Three kinds of alloys with different growth rates of 10 μm/s, 15 μm/s and 20 μm/s were prepared. The results show that the tensile properties of the alloy at 800 ℃ decrease with increasing growth rate, and recrystallization occurred at the position of intracrystal fracture in the microstructure. The size of columnar crystals decreases with the increase of the growth rate, increasing the number of grains and decreasing the orientation difference between the growth and axial directions as well as the preferred orientation of lamellar, and the anisotropy of the material, which leads to the obvious decrease of the tensile strength and plasticity. Combined with electron backscattering diffraction test results, the lamellar orientation of the effective parts of the three specimens after high temperature stretching was studied. It was found that the axial preferred orientation of the alloy specimens decreased obviously with the increase of the growth rate, and the orientation became disorderly and the uniformity of lamellar thickness decreased gradually with the increase of the growth rate. In addition, it was found that a new single-phase γ phase is formed in the microstructure after high temperature stretching, and the distribution range increased with the increase of the growth rate, which seriously degraded the axial preferred orientation of the alloy. It can be concluded that the directionally solidified alloy with a growth rate of 10 μm/s has better microstructure orientation and high temperature tensile properties.","PeriodicalId":49875,"journal":{"name":"Materials Science-Poland","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49230424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation and Properties of Masonry Mortar from Spontaneous Combustion Coal Gangue 自燃煤矸石砌筑砂浆的制备及性能研究

IF 1.1 4区材料科学

Materials Science-Poland Pub Date : 2023-08-16 DOI: 10.5755/j02.ms.31843

Wenqing Meng, Xin Liu, Shenglei Feng, Hanlong Cui, Yapeng Zhang

{"title":"Preparation and Properties of Masonry Mortar from Spontaneous Combustion Coal Gangue","authors":"Wenqing Meng, Xin Liu, Shenglei Feng, Hanlong Cui, Yapeng Zhang","doi":"10.5755/j02.ms.31843","DOIUrl":"https://doi.org/10.5755/j02.ms.31843","url":null,"abstract":"To solve the problem of gangue stockpiling, this paper intends to study the feasibility of preparing masonry mortar based on spontaneous combustion gangue. After crushing the spontaneous combustion gangue, the gangue below 4.75 mm was selected, and substituted manufactured sand to prepare masonry mortar in equal quantity. The single factor test method was used to select the replacement rate of spontaneous combustion gangue, water-binder ratio (W/B) and water reducer dosage as variables to explore their effects on the basic properties of fresh mortar mixtures, such as fluidity, apparent density and water retention of fresh mortar, and the mechanical properties of hardened mortar. The anti-frost resistance of gangue mortar was evaluated by a freezing-thawing cycle test. SPSS.20 software was used for variance analysis, and the results showed that the replacement rate of spontaneous combustion gangue, W/B and water reducer dosage on mechanical properties of mortar differences are significant (P < 0.001). With the increase of the replacement rate of spontaneous combustion gangue, the mortar strength decreases, and with the rise of W/B, the mortar strength raises first and then reduces, while with the increase of the water reducer dosage, the mortar strength increases first and then decreases. Spontaneous combustion gangue mortar shows better anti-frost resistance under the freezing-thawing cycle. After 50 freezing-thawing cycles, the maximum mass and strength loss rate of mortar specimens are 2.4 % and 12.67 %, respectively. When the replacement rate of spontaneous combustion coal gangue is 100 %, the mechanical properties and anti-frost resistance of mortar both meet the requirements of the standard and realize the maximum utilization of gangue waste resources. This paper aims to provide theoretical support for the application of spontaneous combustion gangue in masonry mortar.","PeriodicalId":49875,"journal":{"name":"Materials Science-Poland","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46061863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simple Ways to Obtain Activation Energy for Hydride Decomposition by Applying Data from a Volumetric Method to the Kissinger Equation 利用Kissinger方程的体积法数据求氢化物分解活化能的简单方法

IF 1.1 4区材料科学

Materials Science-Poland Pub Date : 2023-08-16 DOI: 10.5755/j02.ms.32434

M. Song, Y. Kwak

引用次数: 0

Plasma electrolytic oxidation of AZ31 Mg alloy in bipolar pulse mode and influence of corrosion to surface morphology of obtained coatings AZ31镁合金双极脉冲模式等离子体电解氧化及其腐蚀对镀层表面形貌的影响

IF 1.1 4区材料科学

Materials Science-Poland Pub Date : 2023-08-16 DOI: 10.5755/j02.ms.32182

R. Drunka, I. Blumbergs, P. Iesalniece, K. Savkovs, I. Šteins

引用次数: 1

The Quantum Chemical Investigation on the Structure-Activity Relationship of a Schiff Base Corrosion Inhibitor 席夫碱缓蚀剂构效关系的量子化学研究

IF 1.1 4区材料科学

Materials Science-Poland Pub Date : 2023-08-16 DOI: 10.5755/j02.ms.33818

Hong Ju, Di Zhu, Shu-Fa Liu, Hanzhi Li

引用次数: 0

Effect of Bentonite Admixture Content on Effective Porosity and Hydraulic Conductivity of Clay-based Barrier Backfill Materials 膨润土掺量对粘土基阻隔回填材料有效孔隙率和导流系数的影响

IF 1.1 4区材料科学

Materials Science-Poland Pub Date : 2023-08-16 DOI: 10.5755/j02.ms.32075

Yiyang Lv, Haoqing Xu, P. Jiang, Tao Wu

{"title":"Effect of Bentonite Admixture Content on Effective Porosity and Hydraulic Conductivity of Clay-based Barrier Backfill Materials","authors":"Yiyang Lv, Haoqing Xu, P. Jiang, Tao Wu","doi":"10.5755/j02.ms.32075","DOIUrl":"https://doi.org/10.5755/j02.ms.32075","url":null,"abstract":"Clay-based barrier wall has been diffusely employed as vertical barriers. Nevertheless, there were few project practices of these walls in China. And few research have been performed to study the impact on the permeability of the addition of domestic bentonites. To solve this problem, the influences of bentonite level on hydraulic conductivity, porosity and clay-bound water of soil-bentonite admixtures have been assessed employing a flexible-wall test and water centrifugal dewatering experiment with various bentonites. The outcomes revealed that as barrier walls are constructed by blending bentonite and Fujian standard sandy soil, there is a critical bentonite level of the smallest porosity. If the bentonite level is less than the critical bentonite content, hydraulic conductivity is reduced quickly, while if the bentonite level is greater than the critical bentonite content, hydraulic conductivity is reduced gently. Additionally, as the bentonite level grew, the clay-bound water centage of the admixtures continually improved. Supposing that the clay-bound water enclosed the clay grains, a near computation approach of the effective porosity is put forward and showed that the effective porosity decreased with bentonite content. Additionally, an exponential relationship was found between the effective porosity and the permeability.","PeriodicalId":49875,"journal":{"name":"Materials Science-Poland","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43398497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis and Determination of Al3+ in Chinese Herbs from Heilongjiang Province by Fluorescent Probe of Naphthalimide 萘酰亚胺荧光探针法合成及测定黑龙江中草药中Al3+含量

IF 1.1 4区材料科学

Materials Science-Poland Pub Date : 2023-08-16 DOI: 10.5755/j02.ms.33594

Guang Yang, Yan Lang

引用次数: 0

Effect of MgO and Al2O3 on High-temperature Stability Performance of High-alumina Cement MgO和Al2O3对高铝水泥高温稳定性能的影响

IF 1.1 4区材料科学

Materials Science-Poland Pub Date : 2023-08-16 DOI: 10.5755/j02.ms.33912

Yibo Wang, Jinbo Gao

{"title":"Effect of MgO and Al2O3 on High-temperature Stability Performance of High-alumina Cement","authors":"Yibo Wang, Jinbo Gao","doi":"10.5755/j02.ms.33912","DOIUrl":"https://doi.org/10.5755/j02.ms.33912","url":null,"abstract":"High-alumina cement has an important position in refractory materials with its good performance at high temperatures, but its disadvantages such as strength inversion and unstable transformation of hydration products have always limited its development. To clarify the working mechanism of high-alumina cement and improve its high temperature resistance, MgO and Al2O3 were added to the high-alumina cement paste. The optimal design method was used to determine the influence of each factor on the high temperature stability of the cement paste. The mix ratio of raw materials was optimized and the strength change patterns of the specimens under the optimal ratio were verified. From a microstructure perspective, the high temperature evolution of the hardened paste of high-alumina cement was explored using X-ray diffraction, scanning electron microscopy, thermogravimetry, and differential scanning calorimetry. The results show that the introduction of refractory powders, especially Al2O3, can significantly improve the volumetric stability of the cement paste at high temperatures. When the water-cement ratio is 0.20, the admixture of MgO is 5 % or 10 %, and Al2O3 is 20 %, the high temperature volume stability of the cement paste is the best. However, its corresponding mechanical strength is weakened to some extent with an increase in calcinating temperature. Moreover, the structure-property evolution process of cementite under high temperature calcinating conditions was verified by microstructural characterization, especially the influence of the powder on the volume and strength of the cement block at high temperatures. The results of this study can serve as a guide for the development of high-alumina cement and its cementing materials, as well as for the improvement of their properties.","PeriodicalId":49875,"journal":{"name":"Materials Science-Poland","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49410256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0