Results 1 to 10 of about 271,926 (150)
Zhongguo youzhi, 2023 油脂及富含油脂食品（巧克力、冰淇淋、人造奶油等）的物理特性很大程度上取决于其脂肪的结晶状态。油脂结晶改良剂的添加可以影响底物油脂的结晶行为从而改变产品的质构，进而调控油脂结晶，使其应用于各种产品和工艺中。分别对单甘酯、甘二酯、甘三酯、蔗糖酯、聚甘油脂肪酸酯、磷脂、无机物等作为结晶改良剂对不同底物油脂的结晶调控效果进行综述，并对现阶段结晶改良剂的作用机制的研究成果进行了总结。结晶改良剂的种类和用量显著影响底物油脂的结晶行为，结晶改良剂与底物油脂中主要甘三酯的匹配性是调控底物油脂结晶的关键 ...
张露，张晴 ZHANG Lu，ZHANG Qing
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Gongye shui chuli, 2011 采用静态实验方法对硫酸钙的结晶过程进行了研究，考察了温度、Ca2+和SO42-初始浓度、其他成垢离子及阻垢剂对硫酸钙结晶过程的影响。结果表明，升高温度会缩短硫酸钙结晶初期的“诱导期”，并增加晶体成核速率在结晶过程中的控制比重；Ca2+和SO42-初始浓度越大，硫酸钙结晶速度越快；HCO3-和 PO43-影响硫酸钙结晶过程的原 因在于溶液离子强度的变化使硫酸钙的溶度积发生改变； 阻垢剂对硫酸钙结晶的抑制作用主要以抑制晶体成核过程为主。
徐海, 郦和生, 王岽
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Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT NiCoCrAlYTa coatings are widely used as bond coats in thermal barrier coating (TBC) systems for gas turbines and aeroengines to provide oxidation resistance and support the formation of a protective thermally grown oxide (TGO). Herein, high‐current pulsed electron beam (HCPEB) modification was utilized to strengthen a NiCoCrAlYTa coating by ...
Xiangcheng Li +6 more
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Size effect on crystallite microstructure in nanocrystalline brookite-based TiO2(纳米板钛矿基TiO2的晶粒尺寸效应)
Zhejiang Daxue xuebao. Lixue ban, 2001 借助精确的X射线衍射测量，结合独立衍射峰对不同晶粒度纳米板钛矿基TiO2样品中板钛矿和金红石相的微结构参量进行了较细致的研究，给出了标征物相、晶面指数(hk1)和晶面间距dhkl值，详细分析结果的系列XRD谱，并得到晶面间距、晶格常数、轴比、晶胞体积等参数数值及其相对常规粗晶的变化情况，从而初步揭示出其晶粒微结构的尺寸效应.作者首次发现，纳米板钛矿基TiO2样品中板钛矿和金红石相晶粒均存在着非单调的各向异性晶格畸变.
LIUXiang-dong(刘向东) +4 more
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Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Rationally selection of precursor additives during perovskite crystallization is essential for obtaining high‐quality films and achieving high‐performance perovskite solar cells (PSCs). However, the discovery and optimization of effective additives still rely heavily on time‐consuming and costly trial‐and‐error experiments.
Zhimin Feng +12 more
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Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Photocatalysis has emerged as a promising approach for solar energy conversion and environmental remediation. However, its practical implementation is still hindered by limited charge‐separation efficiency, slow surface reaction kinetics, and insufficient catalyst stability.
Mengting Zhang +5 more
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Teshugang, 2021 铸坯高中心等轴晶率及小的二次枝晶臂间距有利于降低高碳钢M+E-EMS连铸坯中心偏析。通过建立GCr15钢220 mm×260 mm连铸坯耦合有限元-元胞自动机模型(CAFE)及二次枝晶臂间距(SDAS)模型,研究结晶器电磁搅拌、过热度和拉速对中心等轴晶率及二次枝晶臂间距的影响。结果表明,相比于拉速,过热度和结晶器电磁搅拌对其影响明显。随着过热度降低及结晶器电磁搅拌强度增加,铸坯中心等轴晶率增加而二次枝晶臂间距减小,而拉速对凝固终点和中心固相率影响大。工业试验结果表明,采用结晶器与凝固末端电磁搅拌 ...
左欢, 杨祝英, 安航航
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Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT The development of high‐performance and cost‐effective oxygen evolution reaction (OER) electrocatalysts is critical for the large‐scale deployment of green hydrogen technologies. Among various candidates, amorphous alloys have emerged as promising OER catalysts owing to their long‐range disordered atomic structures, high energy states, and ...
Bo Li +10 more
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Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT The performance optimization of ultrahigh‐strength Cu‐15Ni‐8Sn alloy relies on controlling recrystallization and aging precipitation, which are two thermally activated processes constrained by high activation barriers. Conventional heat treatment requires elevated temperatures and prolonged holding time, inevitably leading to grain coarsening ...
Fei Tan +10 more
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四川大学学报. 自然科学版, 2007 采用差示扫描热量仪(DSC),通过非等温结晶方法研究了全芳及半芳族热致性液晶(TLCP)对聚苯硫醚(PPS)结晶行为的影响,并通过偏光显微镜(PLM)分析了结晶过程中的微观结构.研究表明,加入少量全芳或半芳族TLCP,可显著提高PPS最大结晶温度和结晶速率,全芳族TLCP起异向成核作用,而半芳族TLCP促进晶体增长.
张冠星 +4 more
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