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Wet chemical synthesis of Sm3+ doped Ca10(PO4)6Cl2 phosphor for w-LED application 湿化学合成Sm3+掺杂的w-LED用Ca10(PO4)6Cl2荧光粉
IF 1.7
Materials Letters: X Pub Date : 2023-09-01 DOI: 10.1016/j.mlblux.2023.100214
R.T. Maske , A.N. Yerpude , S.J. Dhoble
{"title":"Wet chemical synthesis of Sm3+ doped Ca10(PO4)6Cl2 phosphor for w-LED application","authors":"R.T. Maske ,&nbsp;A.N. Yerpude ,&nbsp;S.J. Dhoble","doi":"10.1016/j.mlblux.2023.100214","DOIUrl":"10.1016/j.mlblux.2023.100214","url":null,"abstract":"<div><p>Wet chemical technique was used for the Synthesis of Sm<sup>3+</sup> doped Ca<sub>10</sub>(PO<sub>4</sub>)<sub>6</sub>Cl<sub>2</sub> phosphor. The phase purity was analyzed by using X-Ray diffraction (XRD), which show that the synthesized phosphor was well matched with standard PDF file. Photoluminescence properties of Ca<sub>10</sub>(PO<sub>4</sub>)<sub>6</sub>Cl<sub>2</sub>:Sm<sup>3+</sup> phosphor shows emission peak at 563 nm, 607 nm &amp; 646 nm corresponding to <sup>4</sup>G<sub>5/2</sub>→(<sup>6</sup>H<sub>5/2</sub>, <sup>6</sup>H<sub>7/2</sub>, <sup>6</sup>H<sub>9/2</sub>) transition of Sm<sup>3+</sup> ions. The emission spectra of Ca<sub>10</sub>(PO<sub>4</sub>)<sub>6</sub>Cl<sub>2</sub>:Sm<sup>3+</sup> phosphor was very intense and sharp. As per the current investigation of synthesized phosphor, it indicate that it is a used in solid state lighting devices and display application.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"19 ","pages":"Article 100214"},"PeriodicalIF":1.7,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42183687","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}
引用次数: 0
Potential and challenges for large-scale near-net-shaping of 7xxx aerospace grade aluminum via additive friction stir deposition 通过添加剂摩擦搅拌沉积大规模近净成型7xxx航空级铝的潜力和挑战
IF 1.7
Materials Letters: X Pub Date : 2023-09-01 DOI: 10.1016/j.mlblux.2023.100217
Hang Z. Yu, Greg D. Hahn
{"title":"Potential and challenges for large-scale near-net-shaping of 7xxx aerospace grade aluminum via additive friction stir deposition","authors":"Hang Z. Yu,&nbsp;Greg D. Hahn","doi":"10.1016/j.mlblux.2023.100217","DOIUrl":"10.1016/j.mlblux.2023.100217","url":null,"abstract":"<div><p>This letter examines the potential and challenges of using additive friction stir deposition for large-scale near-net-shaping of 7xxx Al alloys, particularly AA7075 and AA7050. Compared to fusion-based additive manufacturing, which is unable to print these alloys without feedstock modification or composition change, additive friction stir deposition is an emerging solid-state additive process with a thermomechanical processing nature that can render fully-dense AA7075 and AA7050 in the as-deposited state. More importantly, wrought-like tensile properties have been demonstrated in the deposited AA7075 based on the original composition. The process is well-suited for large-scale printing due to its high build rate and scalability. Significant challenges nevertheless exist in process and post-process control, in addition to the impurity from lubrication.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"19 ","pages":"Article 100217"},"PeriodicalIF":1.7,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42347565","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}
引用次数: 1
Optimization of dysprosium ions doped borate glasses for photoluminescence applications 用于光致发光应用的掺镝硼酸盐玻璃的优化
IF 1.7
Materials Letters: X Pub Date : 2023-09-01 DOI: 10.1016/j.mlblux.2023.100208
Manjeet , Ravina , Amit , Kanishk Poria , Nisha Deopa , Anand Kumar , R.P. Chahal
{"title":"Optimization of dysprosium ions doped borate glasses for photoluminescence applications","authors":"Manjeet ,&nbsp;Ravina ,&nbsp;Amit ,&nbsp;Kanishk Poria ,&nbsp;Nisha Deopa ,&nbsp;Anand Kumar ,&nbsp;R.P. Chahal","doi":"10.1016/j.mlblux.2023.100208","DOIUrl":"10.1016/j.mlblux.2023.100208","url":null,"abstract":"<div><p>In this report, we present a comprehensive explanation of the luminescent features of Dy<sup>3+</sup>-ions doped Zinc Sodium Lead Borate (ZnNaPbB) glasses through various characterizations like UV–Vis-NIR, absorption and emission spectroscopy. The absorption spectra were used to determine the optical bandgap (E<sub>opt</sub>) and Urbach energy (ΔE). The emission spectra are dominated by three peaks (strong yellow, blue and weak red) in the visible range at 481 nm, 575 nm and 664 nm. The CIE coordinates lie in the pure white region of the chromaticity diagram indicating that the as-prepared glasses have possible applications for optoelectronic devices.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"19 ","pages":"Article 100208"},"PeriodicalIF":1.7,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43099541","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}
引用次数: 0
Formulation of calcium based 8-HQ fluorescent paint for fluorescent paint applications 用于荧光涂料应用的钙基8-HQ荧光涂料的配方
IF 1.7
Materials Letters: X Pub Date : 2023-09-01 DOI: 10.1016/j.mlblux.2023.100211
Ritesh Raikundliya , N. Thejo Kalyani , S.J. Dhoble
{"title":"Formulation of calcium based 8-HQ fluorescent paint for fluorescent paint applications","authors":"Ritesh Raikundliya ,&nbsp;N. Thejo Kalyani ,&nbsp;S.J. Dhoble","doi":"10.1016/j.mlblux.2023.100211","DOIUrl":"10.1016/j.mlblux.2023.100211","url":null,"abstract":"<div><p>We report the formulation of luminous paints with calcium-based quinoline complex, bis(8-hydroxyquinoline) (calcium) – Caq<sub>2</sub> as a pigment (where Ca = Calcium, q = 8-hydroxy quinoline). Fourier transform infrared (FTIR) spectra, UV–Visible absorption, Photoluminescence (PL) spectra and photometric evaluation of the pigment were probed to evaluate its structural, optical and photometric properties. The excitation spectra of Caq<sub>2</sub> pigment portrays a broad excitation peak at 370 nm, while emission spectra reveal a broad peak, registered at 473 nm which falls in the bluish-green region of the visible spectrum. Further, fluorescent paints were formulated on glass slides with epoxy resin/ urea formaldehyde as binder and toluene as solvent. The results reveal the change in intensity of the painted panels in the following order I<sub>ZnO Epoxy(50%)</sub> &gt; I<sub>Epoxy</sub> based pure pigment &gt; I<sub>UF</sub> based pure pigment &gt; I<sub>ZnO Epoxy(10%)</sub> &gt; I<sub>ZnO UF(10%)</sub>. These results reveal the potential of the pigment as one of the components of fluorescent paint.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"19 ","pages":"Article 100211"},"PeriodicalIF":1.7,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44148187","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}
引用次数: 0
Thermal diffusivity measurement of undoped Yb2O3 oxide by self-made photoacoustic cell 自制光声电池测量未掺杂氧化钇的热扩散率
IF 1.7
Materials Letters: X Pub Date : 2023-09-01 DOI: 10.1016/j.mlblux.2023.100213
Minarul I. Sarkar, Kaushal Kumar
{"title":"Thermal diffusivity measurement of undoped Yb2O3 oxide by self-made photoacoustic cell","authors":"Minarul I. Sarkar,&nbsp;Kaushal Kumar","doi":"10.1016/j.mlblux.2023.100213","DOIUrl":"10.1016/j.mlblux.2023.100213","url":null,"abstract":"<div><p>Photoacoustic spectroscopy is an essential technique for material characterization by measuring acoustic noise inside a cell. In this work, we have fabricated a photoacoustic cell and a pre-amplifier circuit and optimized both for maximum sensitivity. The cavity volume is measured ∼4.90 × 10<sup>−6</sup> m<sup>3</sup> at optimum condition. After that, the thermal diffusivity of undoped ytterbium oxide is measured by recording photoacoustic voltages. It is found 42.22–44.90 mm<sup>2</sup>/s for the excitation pump power 150–300 mW range by 980 nm diode laser source.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"19 ","pages":"Article 100213"},"PeriodicalIF":1.7,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49153044","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}
引用次数: 2
Epoxy free LED devices: Physical and optical examination of praseodymium doped borate glasses for enhanced performance 无环氧树脂LED器件:增强性能的掺镨硼酸盐玻璃的物理和光学检查
IF 1.7
Materials Letters: X Pub Date : 2023-09-01 DOI: 10.1016/j.mlblux.2023.100210
Amit Kumar , Ravina , Anu , V. Kumar , Nisha Deopa , R. Punia , A.S. Rao
{"title":"Epoxy free LED devices: Physical and optical examination of praseodymium doped borate glasses for enhanced performance","authors":"Amit Kumar ,&nbsp;Ravina ,&nbsp;Anu ,&nbsp;V. Kumar ,&nbsp;Nisha Deopa ,&nbsp;R. Punia ,&nbsp;A.S. Rao","doi":"10.1016/j.mlblux.2023.100210","DOIUrl":"10.1016/j.mlblux.2023.100210","url":null,"abstract":"<div><p>Borate glass doped with Praseodymium (Pr<sup>3+</sup>) having different concentration were synthesized via melt quenching method. The density of the glass is proven to enhance with the abundance of the Pr<sup>3+</sup> ions resulting in structural compactness of the glass. Variation of the dielectric constant, reflection loss, molar refraction and polaron radius has been analyzed with the concentration of Pr<sup>3+</sup> ions. Absorption spectra were recorded in the range of 200 nm-1800 nm and seven peaks were observed. Band gap is evaluated using Tauc plot. Absorption spectra are used to assess the bonding parameter and Judd-Ofelt intensity parameter. The results of the Judd Ofelt theory are consistent with the bonding parameters. Variation of the Urbach energy with the band gap has been analyzed. The known result affirms the glasses potential as a green component in reddish orange luminescent devices.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"19 ","pages":"Article 100210"},"PeriodicalIF":1.7,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45654674","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}
引用次数: 0
Photoluminescence characteristics of a novel orange red-emitting Eu3+ doped K3Ca2(SO4)3F phosphor for W-LED 一种新型桔红色Eu3+掺杂K3Ca2(SO4)3F荧光粉的W-LED光致发光特性
IF 1.7
Materials Letters: X Pub Date : 2023-09-01 DOI: 10.1016/j.mlblux.2023.100215
M.D. Mehare , A.R. Bansod , C.M. Mehare , S.A. Dhale , S.J. Dhoble
{"title":"Photoluminescence characteristics of a novel orange red-emitting Eu3+ doped K3Ca2(SO4)3F phosphor for W-LED","authors":"M.D. Mehare ,&nbsp;A.R. Bansod ,&nbsp;C.M. Mehare ,&nbsp;S.A. Dhale ,&nbsp;S.J. Dhoble","doi":"10.1016/j.mlblux.2023.100215","DOIUrl":"10.1016/j.mlblux.2023.100215","url":null,"abstract":"<div><p>The present work reported the synthesis of Eu<sup>3+</sup>-activated K<sub>3</sub>Ca<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>F sulfate-based phosphors via a solid-state reaction method (SSR). The crystal structure of as-synthesized phosphor was studied by XRD analysis. The PL and PLE spectrum were investigated using photoluminescence spectroscopy. The PL excitation spectrum monitored at 616 nm shows sharp line excitation peaks at 395 nm,466 nm and 535 nm, attributes to <sup>7</sup>F<sub>0</sub>→ <sup>5</sup>L<sub>6,</sub> <sup>7</sup>F<sub>0</sub>→ <sup>5</sup>D<sub>2,</sub> and <sup>7</sup>F<sub>0</sub>→ <sup>5</sup>D<sub>1</sub> transitions respectively. The PL spectrum under UV excitation of 395 nm exhibits emission in the red region centered at 592 nm and 616 nm, corresponding to <sup>5</sup>D<sub>0</sub>→ <sup>7</sup>F<sub>1,</sub> and <sup>5</sup>D<sub>0</sub>→ <sup>7</sup>F<sub>2</sub> transitions of Eu<sup>3+</sup> ions in the host. The CIE coordinates confirm the emission in the orange-red region positioned at (0.6824, 0.3175) with color purity of 97.37% and CCT 3872.2 K. The obtained outcome reveals that the reported K<sub>3</sub>Ca<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>F: Eu<sup>3+</sup> phosphor is the best candidate as UV excitable orange-red emitting phosphor for w-LEDs.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"19 ","pages":"Article 100215"},"PeriodicalIF":1.7,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44017333","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}
引用次数: 0
Europium(III) diphenylphosphinate as a potential low-dimensional nanostructured coordination polymer scintillator 二苯基膦酸铕作为一种潜在的低维纳米配位聚合物闪烁体
IF 1.7
Materials Letters: X Pub Date : 2023-09-01 DOI: 10.1016/j.mlblux.2023.100216
Luís Felipe Bricks Bim , Marco Aurélio Cebim
{"title":"Europium(III) diphenylphosphinate as a potential low-dimensional nanostructured coordination polymer scintillator","authors":"Luís Felipe Bricks Bim ,&nbsp;Marco Aurélio Cebim","doi":"10.1016/j.mlblux.2023.100216","DOIUrl":"10.1016/j.mlblux.2023.100216","url":null,"abstract":"<div><p>Rare earth diphenylphosphinates – [RE(<em>dpp</em>)<sub>3</sub>]<sub>n</sub> – are low-dimensional nanostructured luminescent materials with considerable thermal and chemical stability, obtained in powder form, consisting of highly insoluble nanowire/nanorod-shaped particles. As a potential candidate for applications as nanocrystalline scintillator devices, [Eu(<em>dpp</em>)<sub>3</sub>]<sub>n</sub> has been synthesized by wet route precipitation methodologies. X-ray excited optical luminescence (XEOL) measurements revealed that the samples show intense emission under X-ray excitation, presenting structural and electronic stability against continuous and prolonged exposure to ionizing radiation without changing the chemical environment in which the trivalent europium ion is inserted. Indeed, the self-structuring of [RE(<em>dpp</em>)<sub>3</sub>]<sub>n</sub> in a polymeric matrix of high thermal stability allowed [Eu(<em>dpp</em>)<sub>3</sub>]<sub>n</sub> to be a low-dimensional nanostructured luminescent coordination polymer resistant to <em>radiation damage.</em></p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"19 ","pages":"Article 100216"},"PeriodicalIF":1.7,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48891659","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}
引用次数: 0
A luminescent pyrene-valine conjugates for the detection of copper (II) ions in aqueous media 一种荧光芘-缬氨酸偶联物，用于检测水介质中的铜离子
IF 1.7
Materials Letters: X Pub Date : 2023-09-01 DOI: 10.1016/j.mlblux.2023.100212
Kamlesh Kumar Nigam, Arpna Tamrakar, Gargi Mishra, Mrituanjay D. Pandey
{"title":"A luminescent pyrene-valine conjugates for the detection of copper (II) ions in aqueous media","authors":"Kamlesh Kumar Nigam,&nbsp;Arpna Tamrakar,&nbsp;Gargi Mishra,&nbsp;Mrituanjay D. Pandey","doi":"10.1016/j.mlblux.2023.100212","DOIUrl":"10.1016/j.mlblux.2023.100212","url":null,"abstract":"<div><p>A novel pyrene-based fluorescent chemosensor (pyren-1-ylmethyl)-L-valine (1) has been synthesized. 1 is a highly selective chemosensor for detecting Cu(II) ions through fluorescence quenching over other competitive metal ions and showing aqueous-organic solvent-based gelation properties. Rod-shaped surface morphology may be attributed to intermolecular Hydrogen bonding between the carboxylic acid group and π-π stacking of pyrene moiety. In addition, 1 can also be utilized for the practical detection of Cu<sup>2+</sup>ion in natural water samples.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"19 ","pages":"Article 100212"},"PeriodicalIF":1.7,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46018432","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}
引用次数: 1
Joining mechanism of connection between Ag-plated Kovar interconnector and stranded Ag-plated Cu wire produced via parallel gap resistance welding 平行间隙电阻焊镀银Kovar互连器与镀银铜绞线的连接机理
IF 1.7
Materials Letters: X Pub Date : 2023-09-01 DOI: 10.1016/j.mlblux.2023.100209
Yuhan Ding , Bo Zhang , Chen Shen , Nannan Chen , Jusha Ma , Kanglong Wu , Yi Wei , Lin Wang , Bin Qian , Xueming Hua
{"title":"Joining mechanism of connection between Ag-plated Kovar interconnector and stranded Ag-plated Cu wire produced via parallel gap resistance welding","authors":"Yuhan Ding ,&nbsp;Bo Zhang ,&nbsp;Chen Shen ,&nbsp;Nannan Chen ,&nbsp;Jusha Ma ,&nbsp;Kanglong Wu ,&nbsp;Yi Wei ,&nbsp;Lin Wang ,&nbsp;Bin Qian ,&nbsp;Xueming Hua","doi":"10.1016/j.mlblux.2023.100209","DOIUrl":"10.1016/j.mlblux.2023.100209","url":null,"abstract":"<div><p>A space solar array includes GaAs solar cell, interconnector, and stranded Cu wire. Due to the preferential high working efficiency, the assembly of solar array is mostly performed using parallel gap resistance welding (PGRW). Since strengthening of the PGRW joints is the key to further extend service life of solar array, it is necessary to elucidate joining mechanism of each connection. In the present research, to clarify the controversy over PGRW joining mechanism between Ag-plated Kovar interconnector and stranded Ag-plated Cu wire, various advanced material characterization methods are conducted to joining interfaces. Experimental results confirm that, in addition to the known Ag/Cu eutectic interface, solid evidence of metallurgy bonding is also found in Cu/Cu interface. Such finding has significant implication for further enlarge the PGRW process window and produce stronger joints.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"19 ","pages":"Article 100209"},"PeriodicalIF":1.7,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47897349","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}
引用次数: 0
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