共查询到20条相似文献,搜索用时 46 毫秒
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光素器是紫砂茗壶中三大造型体系的一种,它和花货、筋囊器并存于世,交相辉映,是茗壶造型艺术中最具代表性的造型。光素器品种较多、范围较广、形制丰富、影响力极大,自宋代问世以来,紫砂光素器历经宋、元、明、清、民国,经过诸如供春、时大彬、杨彭年、陈鸣远、邵大亨、陈寿珍、顾景舟等紫砂艺术大师的开掘、淘洗以及提炼,逐步发展和演进,使美轮美奂 相似文献
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In this study stable latexes of butyl acrylate (BA)/methyl methacrylate (MMA)/diacetone acrylamide (DAAM) copolymers and BA/MMA/vinyl neo-decanoate (VeoVa-10)/DAAM copolymers were synthesized by a modified semi-continuous microemulsion copolymerization. Ammonium persulfate was used as initiator and a redox system for post-polymerization to reduce the free monomers content. Methacrylic acid (MMA), 2-acrylamido-2-methylpropane sulfonic acid (AMPS), acrylic acid (AA) and various “green” industrial anionic, non-ionic and anionic polymerizable surfactants free of alkylphenol ethoxylates (APEO free) were tested as a stabilizing system. The resulting latexes, their corresponding self-1K crosslinkable binder using the adipic acid (ADH) dihydrazide as crosslinking agent and their films were characterized with rotational viscometer, dynamic light scattering, gloss, dynamic mechanical analysis, minimum film forming temperature (MFFT), water resistance and swelling in methyl ethyl ketone measurements. The experiments showed that BA\MMA\VEOVA-10\DAAM latexes prepared with methacrylic acid and a polymerizable surfactant showed zero coagulation during polymerization. Their corresponding 1K crosslinkable binder with ADH were stable over 6 months storage time and showed good all around properties that makes them suitable for use in friendly to the environment coatings. 相似文献
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研究了Al2O3TiN复合物在12501400℃,1050MPa应力范围压缩蠕变后的显微结构变化。结果表明Al2O3TiN复合物具有相当的结构稳定性,蠕变后的晶粒尺寸及晶粒形状与变形前几乎相同。Al2O3/TiN界面能较低,界面粘附性较高。未观察到明显的空洞及晶格位错活动。晶界滑移极可能是控制Al2O3TiN复合物蠕变行为的主要机制 相似文献
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清康雍乾时期是宫廷书法极为发达时期,同时也是御瓷生产的黄金时代,宫廷书法与御瓷紧密结合是此期瓷艺的突出特色之一。康雍乾宫廷书法对御瓷艺术的影响是十分显著的,在其影响下,御瓷艺术表现出独特风采与深邃内涵。 相似文献
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Using scanning tunneling microscopy, the influence of a thin Au layer on the diffusion of Fe adatoms and the subsequent island nucleation on a Si(111) surface is investigated. The adsorbate induces thestructure that increases the surface mobility of subsequently deposited Fe atoms, resulting in the formation well-defined nanoclusters. Surprisingly, the domain walls—inherent to the reconstruction—do not influence the surface diffusion, which demonstrates that the passivation is of much more importance for the self-assembly than the surface corrugation. Using the decoupling of the diffusion and nucleationonthe surface and the reactionwiththe surface and conventional nucleation theory, the activation energy for surface diffusionEd = 0.61 eV and the critical cluster sizei = 3 are determined, which reveal the microscopic details of the diffusion and nucleation processes. 相似文献
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采用平均粒度0 .6μm 99 Al2 O3 原料 粉体,调制高浓度 、低粘度悬浮浆 料,离心成型 成圆筒状 坯体,经1600 ℃常压烧结 ,获陶瓷制品。探 讨了浆料 配方 与离心 转速 对烧 结制品 三点 弯曲强度 等性能与体积密 度的影响。采用 本研究工 艺所获 制品的 三点 弯曲 强度 等性能 与体 积密度 高于国内通常的99 Al2 O3 陶瓷 相似文献
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This article covers the developments on the synthesis and properties of heterocyclic fused π-conjugated bithiophene materials that are potentially applicable in molecular electronics and optoelectronics. This fairly young strategy to efficiently tuning the electronic properties generates materials with very narrow band gaps. The nature of the central bridging heteroatom has a significant impact on the electronic and luminescence properties of these materials leading to intriguing species that can be employed in organic light emitting diodes (OLEDs) or organic field effect transistors (OFETs). So far a variety of heteroelements of group 13–16 (B, Si, Ge, Sn, N, P, S) have been investigated and incorporated into molecular as well as polymeric systems. A significant number of these materials can potentially act as organic emitters, electron or hole transport materials in organic devices but further studies are needed to optimize the necessary properties for the utility of this young class of compound in molecular electronics. 相似文献
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介绍了自80年代以来人们对氧化铝基氧化物陶瓷颗粒复合物以及氧化铝基非氧化物陶瓷颗粒或晶须复合物高温变形的研究。介绍了有关因素对变形行为的影响、变形后显微结构的变化以及相应的变形机理 相似文献
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