Journal of Crystal Growth最新文献

Observation-velocity-convergence-based determination of optimal seeding time for sapphire preparation via Kyroupous method 基于观察-速度收敛的Kyroupous法制备蓝宝石最佳播种时间的确定

IF 1.7 4区材料科学

Journal of Crystal Growth Pub Date : 2025-07-25 DOI: 10.1016/j.jcrysgro.2025.128293

Jia Xu , Tiezhu Qiao , Huijie Dong

{"title":"Observation-velocity-convergence-based determination of optimal seeding time for sapphire preparation via Kyroupous method","authors":"Jia Xu , Tiezhu Qiao , Huijie Dong","doi":"10.1016/j.jcrysgro.2025.128293","DOIUrl":"10.1016/j.jcrysgro.2025.128293","url":null,"abstract":"<div><div>High-quality seeding operations are crucial for ensuring the preparation of high-quality sapphire single crystals, in which the accurate determination of seeding timing is a key issue. However, existing detection methods possess limitations in obtaining sufficient feature points, assessing single feature dimension, and tracking spoke motion on the melt surface. To address these challenges, this study proposes an observation-velocity-convergence method to detect the optimal timing for crystal seeding. The industrial charge coupled device sensors replace eyes of skilled workers to observe in this method. This strategy involves applying an edge detection algorithm to analyze the surface texture of the sapphire melt, optimizing the non-maximum suppression process to increase the number of feature points to 10. Non-uniform sampling is employed to select key frames and extract relevant information about features. The stability of data is assessed by analyzing changes in adjacent angles of characteristic points on the melt surface, followed by determining the best seeding timing using a speed fitting model. This approach not only enhances the dimensional aspect of detecting seeding timing but also improves accuracy while expediting detection rate and reducing data redundancy. Experimental results demonstrate that this strategy increases Class A seed crystal seeding success percentage by 3.3% while reducing seeding time by approximately 0.2 h.</div></div>","PeriodicalId":353,"journal":{"name":"Journal of Crystal Growth","volume":"668 ","pages":"Article 128293"},"PeriodicalIF":1.7,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144714184","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

Distribution of the highly volatile dopant in NaI:Tl crystals grown by the ROST technology ROST技术生长的高挥发性掺杂物在NaI:Tl晶体中的分布

IF 2 4区材料科学

Journal of Crystal Growth Pub Date : 2025-07-23 DOI: 10.1016/j.jcrysgro.2025.128303

V. Protsenko, S. Gridin

引用次数: 0

Glycine crystal growth under air-cooling with/without irradiation of 40 GHz sub-terahertz wave 40 GHz次太赫兹波辐照下甘氨酸晶体的风冷生长

IF 1.7 4区材料科学

Journal of Crystal Growth Pub Date : 2025-07-23 DOI: 10.1016/j.jcrysgro.2025.128309

Kazuma Iwasaki , Kairu Takashima , Sho Fujii , Tsuyoshi Kimura , Masaya Yamamoto , Tadao Tanabe

引用次数: 0

Role of temperature oscillation in growth of large-grain CdZnTe single crystal by traveling heater method 温度振荡对行加热法制备大晶粒CdZnTe单晶生长的影响

IF 1.7 4区材料科学

Journal of Crystal Growth Pub Date : 2025-07-22 DOI: 10.1016/j.jcrysgro.2025.128308

P. Vijayakumar , Subham Dhyani , K. Ganesan , R. Ramar , Edward Prabu Amaladass , R.M. Sarguna , S. Ganesamoorthy

{"title":"Role of temperature oscillation in growth of large-grain CdZnTe single crystal by traveling heater method","authors":"P. Vijayakumar , Subham Dhyani , K. Ganesan , R. Ramar , Edward Prabu Amaladass , R.M. Sarguna , S. Ganesamoorthy","doi":"10.1016/j.jcrysgro.2025.128308","DOIUrl":"10.1016/j.jcrysgro.2025.128308","url":null,"abstract":"<div><div>Self-nucleation in CdZnTe crystal growth remains a significant challenge, despite numerous attempts to achieve large-grain single crystals by restricting multi-nucleation during growth process using the traveling heater method. In this study, we present a novel approach to achieve large-grain CdZnTe single crystals by introducing temperature oscillations above the crystallization temperature during the growth process. This method effectively suppresses secondary nucleation and promotes the preferential selection of a single grain during early stage of growth as well as along the growth axis, by reducing multi-nucleation. By adjusting the amplitude and the number of temperature oscillations, we have successfully grown CdZnTe single crystals with dimensions of 20 mm in diameter and 60 mm in length. The resulting crystals exhibited excellent compositional homogeneity, with a nearly constant resistivity of ∼ 10<sup>9</sup> Ω·cm and Te inclusions smaller than 15 µm along the growth axis. Additionally, the crystal elements were of detector grade achieving an energy resolution of 4.5 % for gamma radiation at 662 keV from a <sup>137</sup>Cs source in a quasi-hemispherical geometry. This study highlights the critical role of temperature oscillations in controlling secondary nucleation and promoting the formation of large-grain single crystals.</div></div>","PeriodicalId":353,"journal":{"name":"Journal of Crystal Growth","volume":"668 ","pages":"Article 128308"},"PeriodicalIF":1.7,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144694647","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

Controlled recrystallization of high-purity, large-particle sodium bicarbonate crystals via CO2-assisted thermal stabilization 利用二氧化碳辅助热稳定技术控制高纯度大颗粒碳酸氢钠晶体的再结晶

IF 1.7 4区材料科学

Journal of Crystal Growth Pub Date : 2025-07-21 DOI: 10.1016/j.jcrysgro.2025.128307

Haojie Jiang , Shuai Wang , Yixin Tang , Feng Ma , Lei Wu , Guoyong Wang , Wu Yin , Yiqiao Hu , Hong Dong

{"title":"Controlled recrystallization of high-purity, large-particle sodium bicarbonate crystals via CO2-assisted thermal stabilization","authors":"Haojie Jiang , Shuai Wang , Yixin Tang , Feng Ma , Lei Wu , Guoyong Wang , Wu Yin , Yiqiao Hu , Hong Dong","doi":"10.1016/j.jcrysgro.2025.128307","DOIUrl":"10.1016/j.jcrysgro.2025.128307","url":null,"abstract":"<div><div>Sodium bicarbonate (NaHCO<sub>3</sub>) is widely used in medicine, environmental protection, and industrial maintenance, yet the production of high-purity, uniformly sized, large-particle crystals remains challenging. Conventional methods, such as recrystallizing industrial-grade NaHCO<sub>3</sub> or carbonating soda ash, often fail to meet pharmaceutical-grade requirements efficiently. In this study, we developed a simplified, cost-effective recrystallization strategy by optimizing dissolution temperature, CO<sub>2</sub> pressure, stirring speed, and crystallization time. Dissolving NaHCO<sub>3</sub> at 75 ℃ under 0.2 MPa CO<sub>2</sub> minimized thermal decomposition and stabilized the supersaturated solution, while crystallization at 45 ℃ followed by a 4‑hour static growth phase produced large (300–400 μm), uniform crystals with enhanced purity and reproducibility. Four repeated crystallization cycles confirmed the high stability and yield of the process. This work offers a practical approach for reliably producing pharmaceutical-grade NaHCO<sub>3</sub> crystals and provides a valuable reference for advancing industrial crystallization technology.</div></div>","PeriodicalId":353,"journal":{"name":"Journal of Crystal Growth","volume":"668 ","pages":"Article 128307"},"PeriodicalIF":1.7,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144694648","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 microwave electric field displacement on diamond deposition in microwave plasma chemical vapour deposition: a three-dimensional simulation study 微波电场位移对微波等离子体化学气相沉积中金刚石沉积影响的三维模拟研究

IF 1.7 4区材料科学

Journal of Crystal Growth Pub Date : 2025-07-19 DOI: 10.1016/j.jcrysgro.2025.128305

Zhijian Guo , Zhiliang Yang , Yuchen Liu , Kang An , Liangxian Chen , Jinlong Liu , Junjun Wei , Chengming Li

{"title":"Effect of microwave electric field displacement on diamond deposition in microwave plasma chemical vapour deposition: a three-dimensional simulation study","authors":"Zhijian Guo , Zhiliang Yang , Yuchen Liu , Kang An , Liangxian Chen , Jinlong Liu , Junjun Wei , Chengming Li","doi":"10.1016/j.jcrysgro.2025.128305","DOIUrl":"10.1016/j.jcrysgro.2025.128305","url":null,"abstract":"<div><div>The investigation of the uniform deposition of large-area, high-quality diamond thick films has been a prominent focus of related research. Herein, a three-dimensional simulation of the microwave plasma chemical vapour deposition (MPCVD) reactor was conducted using the finite element method, with a three-dimensional (3D) model replicating the actual reactor dimensions built in COMSOL software. By analysing the 3D microwave electric field distribution within the resonant cavity, along with the <em>S</em><sub>11</sub> dB parameter related to port reflection, the influence of resonant cavity anharmonicity on microwave plasma deposition of large-area diamond was examined. The deflection and misalignment of the annular cone antenna at the top of the resonant cavity alter its intrinsic frequency, disrupting the optimal resonance between the microwave and the cavity. Consequently, the waveguide transitions from an axially symmetric transmission mode to a non-axially symmetric one, resulting in variations in the microwave electric field distribution under the influence of the substrate holder within the cavity. Based on actual feedback from the diamond film deposition process, precise optimisation of the resonant cavity’s top structure can significantly reduce irregularities in the microwave electric field distribution. This allows for better concentration of maximum field strength at the intended central position and minimises the effects of anharmonicity. This study offers theoretical support for further enhancing the uniform deposition of large-area diamond thick films in MPCVD systems.</div></div>","PeriodicalId":353,"journal":{"name":"Journal of Crystal Growth","volume":"668 ","pages":"Article 128305"},"PeriodicalIF":1.7,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144680785","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

Styrax officinalis-mediated synthesis of ZnO-NPs potentially quorum sensing nano inhibitor 苯乙烯介导的ZnO-NPs潜在群体感应纳米抑制剂的合成

IF 1.7 4区材料科学

Journal of Crystal Growth Pub Date : 2025-07-19 DOI: 10.1016/j.jcrysgro.2025.128304

Tahsin Huner , Deniz Kadir Takcı , Bekir Bulent Arpacı , Hatice Aysun Mercimek Takcı

{"title":"Styrax officinalis-mediated synthesis of ZnO-NPs potentially quorum sensing nano inhibitor","authors":"Tahsin Huner , Deniz Kadir Takcı , Bekir Bulent Arpacı , Hatice Aysun Mercimek Takcı","doi":"10.1016/j.jcrysgro.2025.128304","DOIUrl":"10.1016/j.jcrysgro.2025.128304","url":null,"abstract":"<div><div>We synthesized zinc oxide nanoparticles (ZnO-NPs) using an easy and applicable green approach using <em>Styrax officinalis</em> pericarp. The indirect band gap of sphere-shaped ZnONPs with about 17.53 nm size was 3.25 eV. The Zn-O stretching band of NPs showing slight agglomeration was observed at 476 ± 4.0 cm<sup>−1</sup>. The XRD analysis was carried out to determine the phase composition of Styrax-ZnO-NPs. The anti-virulence activity of NPs via inhibiting endogenous molecular signals-based QS regulation was tested for the two reference bacteria. ZnO-NPs displayed a dose-dependent efficacy, reducing a maximum of 99.82 and 82.36 % pigment production in <em>C. violaceum</em> 12472 and <em>P. aeruginosa</em> PA01, respectively. ZnO-NPs exhibited considerable antioxidant potential with a 14.94 ± 0.00 μg TE /mg phosphomolybdate activity. Moreover, ZnO-NPs showed bactericidal potency at the low minimum inhibitory concentration (0.25 mg/mL) against <em>E. coli</em> 25922 strain. Thus, our outcomes present an insight into the exploitation of Styrax-ZnO-NPs as an alternative therapeutic agent for the therapy of pathogenic infections.</div></div>","PeriodicalId":353,"journal":{"name":"Journal of Crystal Growth","volume":"668 ","pages":"Article 128304"},"PeriodicalIF":1.7,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144694707","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 characterization of malladrite from zeolitized brazilian bentonite 沸石巴西膨润土制备绿锰矿石及表征

IF 1.7 4区材料科学

Journal of Crystal Growth Pub Date : 2025-07-18 DOI: 10.1016/j.jcrysgro.2025.128306

David Enrique Vega Porras, Rômulo Simões Angélica, Simone Patrícia Aranha da Paz

引用次数: 0

The suppression of volatilization via high pressure during melt crystal growth: Analysis via two models of the optical floating zone 熔体晶体生长过程中高压对挥发的抑制：通过光学浮区的两种模型进行分析

IF 1.7 4区材料科学

Journal of Crystal Growth Pub Date : 2025-07-12 DOI: 10.1016/j.jcrysgro.2025.128288

Scott S. Dossa , Jeffrey J. Derby

{"title":"The suppression of volatilization via high pressure during melt crystal growth: Analysis via two models of the optical floating zone","authors":"Scott S. Dossa , Jeffrey J. Derby","doi":"10.1016/j.jcrysgro.2025.128288","DOIUrl":"10.1016/j.jcrysgro.2025.128288","url":null,"abstract":"<div><div>We investigate the role of ambient pressure on volatilization during melt crystal growth using the high-pressure optical floating zone (OFZ) as a prototypical model. Species transport is incorporated into a previously-developed, thermal-capillary model which includes the effects of energy and momentum transport while computing the shape of the zone meniscus, melting front, and solidification front. Results from this model show that pressure monotonically decreases volatilization from the melt zone into the ambient gas and that species transport is both inhibited via diffusion and enhanced via convection as pressure increases. A lumped-parameter model corroborates these findings and clarifies the interaction between diffusion and convection using boundary-layer theory. While increasing pressure always suppresses volatilization, the concurrent strengthening of gas-phase flows with pressure diminishes its effects. For the OFZ system studied here, the evaporative flux of volatile species from melt scales nonlinearly with pressure as <span><math><mrow><msub><mrow><mi>J</mi></mrow><mrow><mi>i</mi></mrow></msub><mo>∼</mo><msup><mrow><mi>P</mi></mrow><mrow><mo>−</mo><mn>2</mn><mo>/</mo><mn>5</mn></mrow></msup></mrow></math></span>, which is greater than the expected scaling of <span><math><mrow><msub><mrow><mi>J</mi></mrow><mrow><mi>i</mi></mrow></msub><mo>∼</mo><msup><mrow><mi>P</mi></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></mrow></math></span> when gas-phase convection is unimportant.</div></div>","PeriodicalId":353,"journal":{"name":"Journal of Crystal Growth","volume":"668 ","pages":"Article 128288"},"PeriodicalIF":1.7,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653522","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

Mild-Condition synthesis of BiSCl microcrystals and its application as a cantilever Sensor for mechanical vibration sensing BiSCl微晶体的温和条件合成及其作为悬臂式机械振动传感器的应用

IF 1.7 4区材料科学

Journal of Crystal Growth Pub Date : 2025-07-11 DOI: 10.1016/j.jcrysgro.2025.128302

Jakub Jała , Tushar Kanti Das , Bartłomiej Nowacki , Bartłomiej Toroń , Krystian Mistewicz , Mirosława Kępińska , Klaudia Kurtyka , Marcin Godzierz

{"title":"Mild-Condition synthesis of BiSCl microcrystals and its application as a cantilever Sensor for mechanical vibration sensing","authors":"Jakub Jała , Tushar Kanti Das , Bartłomiej Nowacki , Bartłomiej Toroń , Krystian Mistewicz , Mirosława Kępińska , Klaudia Kurtyka , Marcin Godzierz","doi":"10.1016/j.jcrysgro.2025.128302","DOIUrl":"10.1016/j.jcrysgro.2025.128302","url":null,"abstract":"<div><div>A simple and reliable method for synthesizing the ternary chalcohalide bismuth sulfochloride (BiSCl) microcrystals has been developed. The proposed method utilizes mild solvents and temperatures up to 180 °C, achieving BiSCl synthesis within seven hours without requiring an autoclave or specialized equipment. The resulting crystals, characterized by scanning electron microscopy (SEM), exhibit an elongated rectangular morphology with sizes ranging from micrometers to sub-micrometers. X-ray diffraction (XRD) confirms the predominance of the BiSCl Pnam phase. Optical properties were investigated using UV–Vis spectroscopy, with diffuse reflectance spectroscopy (DRS) determining an indirect forbidden band gap of 1.71 eV and a direct allowed band gap of 2.04 eV. A flexible (3–3) mode cantilever device was fabricated via drop-casting and tested under ambient conditions using a magnetic shaker in the 5–200 Hz frequency range. The results demonstrate the potential of BiSCl for vibration sensing, showing a voltage response in the millivolt range.</div></div>","PeriodicalId":353,"journal":{"name":"Journal of Crystal Growth","volume":"668 ","pages":"Article 128302"},"PeriodicalIF":1.7,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144605078","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