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本文综述了国内外卤化银高感乳剂的研究现状、发展趋势以及制备卤化银高感乳剂所采用的T-颗粒乳剂、核壳乳剂和外延乳剂技术。 相似文献
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卤化银微晶中掺杂的Ca离子对其性能的影响 总被引:3,自引:2,他引:1
本研究了在卤化银微晶沉淀过程中不同量的Ca离子掺杂对其离子电导和照相性能的影响。掺杂Ca离子使卤化银乳剂的介电损耗曲线上的吸收峰向低频方向移动。相应卤化银乳剂的感光度也有一定程度的提高。 相似文献
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碘离子掺入到高氯乳剂可以显著提高其感光性能。碘离子掺入到亚表层可增加乳剂的光吸收,提高感光度,增加反差。最佳掺入量为0.6%mol/mol Ag,掺入位置在65%Ag处,KI加入速度约8s。在一定范围内(小于1.5%mol/mol Ag)碘离子掺入亚表层对清晰度没有明显影响。如果铱掺杂的掺杂位置为亚表层,掺杂量为10~(-7)mol/mol Ag,铱络合物可有效地改善含碘高氯乳剂的高照度互易律失效。 相似文献
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中空卤化银微晶制备方法已在国内外有关文献中报道[1~7],然而关于中空立方体颗粒乳剂的基本性能及实际应用方面的研究尚未见报道.本文主要制备了中空立方体AgBr(Cl)乳剂,应用表面显影、化学增感方法,并与立方体AgBr和实心立方体AgBr(Cl)乳剂进行对照实验,研究中空卤化银微晶的结构和感光性能的关系,证明中空立方体颗粒乳剂的感光性能优于立方体颗粒乳剂.1 实验部分11 中空立方体溴氯化银乳剂的制备在一个装有高速搅拌装置的乳剂锅中,加入一定量预先制备出的立方体氯化银乳剂作核,在60℃、pAg值为70时,将硝酸银溶液和… 相似文献
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增感染料与卤化银微晶之间的作用及其聚集态的研究 总被引:1,自引:0,他引:1
本文研究了光谱增感染料的结构对立方体卤化银乳剂的感光性能的影响,并利用反射光谱和彩色分析荧光电镜研究了染料在卤化银微晶上的聚集态和J-聚集体的相对尺寸,通过测定乳剂离子电导率研究了染料的结构对乳剂离子电导率的影响。 相似文献
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卤化银乳剂的热增感效应研究 总被引:1,自引:1,他引:0
温度对卤化银胶片感光度的影响很早就有人进行过研究.在1934年,Webb[1]研究了不同温度下卤化银乳剂的互易率曲线,并发现温度对感光度的影响与照度有关.当照度很低时,在一定温度范围内感光度会随温度的降低而升高;在高照度下,随温度的升高感光度也增高.... 相似文献
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氨法乳剂在微粒高感中起着重要的作用,PA改性胶只能适用于中性法高感乳剂沉降.寻求适用于氨法乳剂制备时所用的改性明胶(GGC型)具有重要的意义.本文研究了多种改性明胶的合成。取代度的测定,沉降条件和复溶性能,沉降过程中明胶及卤化银的回收率以及改性明胶卤化银乳剂的感光性能等.研究结果表明,GGC型改性明胶具有以下的优点:取代度高.沉降诱发期短,沉降的pH范围窄,卤化银的回收率高。在用作氨法乳剂沉降剂时,GGC改性胶远比PA胶优异,表现在:耗酸量少和感光度高. 相似文献
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在本工作中,用电镜法、介电损耗法和微波光导法研究了铜离子的掺杂对于卤化银乳剂微晶体的掺杂效应。试验结果表明,铜离子的掺杂使卤化银乳剂微晶体的颗粒变小,使微晶体的介电损耗峰向高频方向稍微移动0.3对数单位。使微晶体的光电导急剧地降低。实验证明,铜离子吸附在卤化银乳剂微晶体的表面,起着深电子陷阱的作用,是导致铜离子的掺杂使乳剂的感光度降低的主要原因。 相似文献
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<正> 3 成像机理 3.1 漂白卤化银全息图的成像机理 卤化银全息图是通过对卤化银全息感光乳剂进行曝光和加工处理而得到的。在这些乳剂中,在最初的化学处理阶段中,由填隙银离子的自动催化还原反应增长了银显影中心,从而得到衍射效率很低的银振幅全息 相似文献
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建筑涂料用高固体分乳液的研究 总被引:1,自引:0,他引:1
通过调整配方和聚合工艺,研制了固体分〉65%的高固体分乳液,特别适宜配制外用厚涂建筑涂料。讨论了诸如乳化剂、引发剂、酸性单体用量、加料方式等乳液聚合因素对乳液性能的影响。 相似文献
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研究了可厚涂高固体分涂料的固化和流挂的控制途径,及其在汽车涂装中的应用,以达到保护环境、节能的目的。提出了该涂料的固化可通过优化催化剂用量和固化条件来控制,流挂可通过添加流动控制剂来控制,并列举了它们的试验结果。 相似文献
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A new laboratory kiln was developed and built to perform over a very wide range of drying conditions. For example, the dry bulb temperature can vary from 30°C to 150°C and the dew point can be adjusted between 20°C and 130°C. Obviously, with such a high level of dew point, pressures over atmospheric pressure may be induced inside the chamber. For this reason, the kiln has been designed to withstand pressure of up to 3 bars. This kiln can also perform vacuum drying.
A programmable controller allows the temperature levels to be maintained within ± 0.2°C. Because the whole kiln can be heated only through the agitated water present at the bottom of the kiln, the load temperature can be increased up to 130°C in saturated conditions, without any change of moisture content.
The kiln has various sensors attached and is capable of withstanding severe conditions (high temperature, saturated vapour and elevated pressures). At present, air and water temperatures as well as temperature at different locations within the board can be collected during the drying process. A load cell and pressure gauges are also available. The first tests performed using this equipment are presented at the end of the paper. 相似文献
A programmable controller allows the temperature levels to be maintained within ± 0.2°C. Because the whole kiln can be heated only through the agitated water present at the bottom of the kiln, the load temperature can be increased up to 130°C in saturated conditions, without any change of moisture content.
The kiln has various sensors attached and is capable of withstanding severe conditions (high temperature, saturated vapour and elevated pressures). At present, air and water temperatures as well as temperature at different locations within the board can be collected during the drying process. A load cell and pressure gauges are also available. The first tests performed using this equipment are presented at the end of the paper. 相似文献
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ABSTRACT A new laboratory kiln was developed and built to perform over a very wide range of drying conditions. For example, the dry bulb temperature can vary from 30°C to 150°C and the dew point can be adjusted between 20°C and 130°C. Obviously, with such a high level of dew point, pressures over atmospheric pressure may be induced inside the chamber. For this reason, the kiln has been designed to withstand pressure of up to 3 bars. This kiln can also perform vacuum drying. A programmable controller allows the temperature levels to be maintained within ± 0.2°C. Because the whole kiln can be heated only through the agitated water present at the bottom of the kiln, the load temperature can be increased up to 130°C in saturated conditions, without any change of moisture content. The kiln has various sensors attached and is capable of withstanding severe conditions (high temperature, saturated vapour and elevated pressures). At present, air and water temperatures as well as temperature at different locations within the board can be collected during the drying process. A load cell and pressure gauges are also available. The first tests performed using this equipment are presented at the end of the paper. 相似文献
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市场需求特别是汽车工业的需求对氮丁橡胶(CR)的性能提出了更高的要求。固外CR制造商通过改进聚合工艺,已开发出在耐热性、耐寒性及抗疲劳性方面有突出改进的新品级、新牌号;传统的黄原二硫化物衍生物调节型CR的性能得到了全面提高,出现了CR同特种橡胶结合的新动向;粘接型CR的性能更加完善。羧基化CR的缺点得到克服,一种便于使用的接枝型CR已经问世。国内CR生产厂应重视科技投入,加紧研究、开发高性能CR,特别要突破传统的聚合工艺,开发分子链线形程度高的CR。 相似文献