Science of Sintering最新文献_第6页

Morphological and structural characterization of MgAl2O4 spinel MgAl2O4尖晶石的形态和结构表征

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos2301001o

N. Obradović, S. Filipović, W. Fahrenholtz, B. Marinkovic, J. Rogan, S. Lević, Antonije Djordjevic, V. Pavlović

引用次数: 0

Characterization of NTC thick film thermistor paste Cu0.2Ni0.5Zn1.0Mn1.3O4 NTC厚膜热敏电阻浆料Cu0.2Ni0.5Zn1.0Mn1.3O4的表征

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos230608036a

S. Aleksic, N. Obradović, N. Mitrović, M. Lukovic

{"title":"Characterization of NTC thick film thermistor paste Cu0.2Ni0.5Zn1.0Mn1.3O4","authors":"S. Aleksic, N. Obradović, N. Mitrović, M. Lukovic","doi":"10.2298/sos230608036a","DOIUrl":"https://doi.org/10.2298/sos230608036a","url":null,"abstract":"A powder of Cu0.2Ni0.5Zn1.0 Mn1.3O4 composition for custom thermistor was prepared by using the respective mixture of metal oxides and solid state reaction at 1000 ?C/4h in air. The obtained thermistor powder was milled in the planetary ball mill and agate mill for a prolonged time to achieve submicron powder. The prepared thermistor powder was further characterized by using XRD and SEM techniques. After that, the thermistor powder was pressed into small disc-shaped samples and sintered at 1150 ?C/2h. The sintered samples were also characterized by using XRD and SEM. The main electrical properties such as nominal resistance R and thermistor exponential factor B were measured in the climatic test chamber. After that, the thick film paste was prepared using the same powder, an organic vehicle and a glass frit. The paste was printed on alumina substrate, dried at 150 ?C /30 min and sintered in air at 850 ?C /10 min in a hybrid conveyor furnace. Planar electrodes were printed on the sintered NTC thermistor layer using PdAg thick film paste. The electric properties of the sintered thick film thermistor were also measured in the climatic test chamber. The obtained results were used for development of novel self-heating thermistor applications.","PeriodicalId":21592,"journal":{"name":"Science of Sintering","volume":"1 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68812630","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

Influence of sintering temperature on structure, physical, and optical properties of wollastonite based glass-ceramic derived from waste eggshells and waste soda-lime-silica glasses 烧结温度对废蛋壳和废钠石灰硅玻璃制备硅灰石基微晶玻璃结构、物理和光学性能的影响

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos230701041h

Chen Hongxu, R. Azis, M. Zaid, K. Matori, I. Ismail

{"title":"Influence of sintering temperature on structure, physical, and optical properties of wollastonite based glass-ceramic derived from waste eggshells and waste soda-lime-silica glasses","authors":"Chen Hongxu, R. Azis, M. Zaid, K. Matori, I. Ismail","doi":"10.2298/sos230701041h","DOIUrl":"https://doi.org/10.2298/sos230701041h","url":null,"abstract":"Calcium oxide from discarded eggshells and waste soda-lime-silica were utilized in this study to make wollastonite (CaSiO3) based glass-ceramics. The calcium oxide and silica were made using the melt-quenching process and sintered for 2 hours at 700 to 1000?C. The XRD data verified that the wollastonite crystalline peak appeared at high sintering temperatures, with crystalline phase values of 39.74%, 47.37%, and 48.91% as the sintering temperature increased at 800-1000?C, respectively. Additionally, crystalline size and phase have no obvious change at 800-1000?C, where the intensity has increased by the sintering temperature. The FTIR spectra revealed the wollastonite phase vibration at the wavelength of 501 cm-1, 650cm-1, 715cm-1, 808cm-1, 931cm-1, 2129 cm-1. Additionally, the FTIR spectral confirm the Si-O-Ca vibration band at the wavelength of 650 cm-1. For the optical sample, the value of indirect allowed transition with n=2 is the ideal value of the optical band gap based on a band gap rise from 3.89 to 4.23 eV with increasing sintering temperature. The value n=2 which is the indirect allowed transition is the optimal value of the optical band gap based on the value increase from 3.89-4.23 eV as the temperature increase. The synthesis approach introduced the low-cost method, recycle approach, simple and yet uses cheap starting materials for fabrication of wollastonite glass-ceramics product.","PeriodicalId":21592,"journal":{"name":"Science of Sintering","volume":"1 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68812870","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

Investigation of Bi2Te2.88Se0.12 bulk single crystal produced using Bridgman method Bridgman法制备Bi2Te2.88Se0.12块状单晶的研究

4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos231017056p

Emina Pozega, Slavko Bernik, Sasa Marjanovic, Ana Petrovic, Igor Svrkota, Andjela Stojic, Danijela Simonovic

引用次数: 0

The influence of strontium content and sintering temperature on monazite stability 锶含量和烧结温度对独居石稳定性的影响

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos220811024m

M. Mirković, J. Maletaskic, S. Butulija, L. Andjelković, M. Šuljagić

引用次数: 0

Dilatometric and microstructural study of particle and functionally graded composites based on hydroxyapatite and crystalline bioglass 羟基磷灰石与结晶生物玻璃的粒子与功能梯度复合材料的膨胀学与微观结构研究

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos221028017d

D. Drdlík, K. Drdlíková, K. Maca

引用次数: 1

Investigation of wear and microhardness behaviors of AA2196 matrix composite materials reinforced with ceramics produced by powder metallurgy method 粉末冶金法制备陶瓷增强AA2196基复合材料的磨损和显微硬度行为研究

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos230417030f

T. Findik

引用次数: 0

The effect of molten salt on the mechanical properties and microstructure of CuNiSi alloys with reinforced Fe 熔盐对加铁CuNiSi合金力学性能和显微组织的影响

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos230327028a

M. Akkaş

{"title":"The effect of molten salt on the mechanical properties and microstructure of CuNiSi alloys with reinforced Fe","authors":"M. Akkaş","doi":"10.2298/sos230327028a","DOIUrl":"https://doi.org/10.2298/sos230327028a","url":null,"abstract":"In this study, CuNiSi alloys were produced using powder metallurgy in molten salt (KBr). In the Cu, Ni, and Si powder mixture, Fe was added at a rate of 2.5%, 5 and 7.5% and mechanical alloying was carried out for 4 hours at 400 rpm. Prepared powder mixtures were cold pressed under 600 MPa pressure and sintered for 3 hours at 900 ? in an argon atmosphere. Phase formation, microstructure, microhardness, electrical conductivity, and corrosion of the produced samples were analyzed in detail. Scanning electron microscope (SEM) was used to detect the changes in the microstructure of the produced samples, and an X-ray diffractogram (XRD) was used to determine the phases formed in the internal structure of the materials. In order to determine the mechanical properties of the produced samples, hardness analyzes were made with a microhardness measuring device. The electrical conductivity properties of the produced CuNiSi and CuNiSiFe alloys were determined due to the increase in the Fe ratio. Corrosion tests of the produced samples were determined by potentiodynamic polarization curves in a 3.5% NaCl solution. Fe-reinforced CuNiSi composite materials have been successfully produced in molten salt (KBr). CuNiSi alloy, the microstructure is dominated by the typical large and small particles. Fe element is homogeneously dispersed in the CuNiSi alloy instead of being separated using the Ni element. Fe particles have decreased the hardness of produced alloys. The electrical conductivity properties changed with increasing voltages depending on the increase of Fe supplementation, and as a result, the sample containing 7.5% Fe had the best electrical conductivity values. Results showed that by increasing the amount of Fe, the mechanical properties and corrosion resistance increased.","PeriodicalId":21592,"journal":{"name":"Science of Sintering","volume":"1 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68812004","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

Effect of sintering on the piezoelectric properties and microstructure of lead free (Ba1-xCaxZr0.1Ti0.9O3) (x=0.065) ceramics 烧结对无铅(Ba1-xCaxZr0.1Ti0.9O3) (x=0.065)陶瓷压电性能和微观结构的影响

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2022-01-01 DOI: 10.2298/sos2202201b

Don Biswas, Prolay Sharma, N. Panwar

引用次数: 0

Comparison of alkali modified fly ash and alkali activated fly ash as Zn(II) ions adsorbent from aqueous solution 碱改性粉煤灰与碱活化粉煤灰作为水溶液中Zn(II)离子吸附剂的比较

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2022-01-01 DOI: 10.2298/sos2201049p

A. Purbasari, D. Ariyanti, S. Sumardiono, Muhammad Shofa, Reinhard Manullang

{"title":"Comparison of alkali modified fly ash and alkali activated fly ash as Zn(II) ions adsorbent from aqueous solution","authors":"A. Purbasari, D. Ariyanti, S. Sumardiono, Muhammad Shofa, Reinhard Manullang","doi":"10.2298/sos2201049p","DOIUrl":"https://doi.org/10.2298/sos2201049p","url":null,"abstract":"Fly ash which is solid waste can be used as an adsorbent for wastewater treatment. Alkali modification and alkali activation on fly ash can increase the adsorption capacity of fly ash. In this study, alkali modified fly ash and alkali activated fly ash were used as Zn(II) ions adsorbents. The effect of adsorption time and initial concentration of Zn(II) ions was studied, as well as the kinetics and isotherm adsorption. The results showed that the removal efficiency of Zn(II) ions by alkali activated fly ash is higher than that by alkali modified fly ash. The adsorptions of Zn(II) ions by alkali modified fly ash and by alkali activated fly ash have reached equilibrium after two hours. The increase of initial concentration of Zn(II) ions would decrease the removal efficiency with both alkali modified fly ash and alkali activated fly ash. Adsorptions of Zn(II) ions by both alkali modified fly ash and alkali activated fly ash tend to follow pseudo second order kinetics model and Langmuir isotherm model with maximum adsorption capacity of 62.696 mg/g and 66.667 mg/g, respectively.","PeriodicalId":21592,"journal":{"name":"Science of Sintering","volume":"1 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68808898","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: 5