SiC对IRFC致密度及性能的影响

基于原位反应复合材料生长的ＥｘｔｅｎｄｅｄＶａｐｏｒ－Ｌｉｑｕｉｄ－Ｓｏｌｉｄ机制，设计使用Ａｌ－Ｓｉ－Ｍｇ合金为母相，煅烧过的ＳｉＣ（１４μｍ）细颗粒为预测件，采用加水ＣａＳＯ４与Ａｌ２Ｏ３混合粉为阻生剂制出体积相对密度在９７％以上，强度高达５００．９±４０．９ＭＰａ，Ｋｉｃ高达５．０８±０．３９ＭＰａ．ｍ１／２的ＩＲＦＣ材料，并运用金相显微镜对ＩＲＦＣ的微观结构进行了分析，用ＥＶＳＬ理论对ＩＲ     

溶胶—凝胶法制备SiO2膜的研究

研究了正硅酸乙酯和硅溶胶水解聚合过程中溶胶聚合物分子的生长过程。用ＴＥＯＳ和硅溶胶作原料。用溶胶－凝胶法制备了有载体和无体体的ＳｉＯ２膜，由不同原料引起的聚合物分子的不同生长模式将引起无载体ＳｉＯ２膜孔径的较大差异，用ＴＥＯＳ制得的无载体ＳｉＯ２膜无１．７ｎｍ以上的孔，而用硅溶胶制得的ＳｉＯ２膜平均孔径为７．５ｎｍ且孔径分布狭窄。用ＴＥＯＳ作原料可在载体α－Ａｌ２Ｏ３上制得无大孔缺陷厚约０．８μｍ     

KTa0.55Nb0.45O3薄膜的介电和铁电及热释电性能研究

在ＢＴ／Ｐｔ／Ｔｉ／ＳｉＯ２／Ｓｉ衬底上用溶胶－凝胶法制备了ＫＴａ０．５５Ｎｂ０．４５Ｏ３（ＫＴＮ）薄膜,０．５μｍＫＴＮ－０．０８μｍＢＴ薄膜在２５℃,１．０ｋＨｚ时,其εｒ＝１１１４,ｔａｎδ＝２．５％;１２℃时,其中Ｐｒ＝２．１μＣ／ｃｍ＾２,Ｐｓ＝４．２μｃ／ｃｍ＾２,Ｅｃ＝５．８ｋＶ／ｃｍ,０．５μｍ厚ＫＴＮ膜的Ｃｕｒｉｅ温度为３５℃;１．０ＫＨｚ时,ＫＴＮ膜的εｒ＝１４１２,估算ＫＴＮ     

溶胶－凝胶法制备SiO_2膜的研究

研究了正硅酸乙酯（ＴＥＯＳ）和硅溶胶水解聚合过程中溶胶聚合物分子的生长过程。用ＴＥＯＳ和硅溶胶作原料，用溶胶－凝胶法制备了有载体和无载体的ＳｉＯ＿２膜。由不同原料引起的聚合物分子的不同生长模式将引起无载体ＳｉＯ＿２膜孔径的较大差异。用ＴＥＯＳ制得的无载体ＳｉＯ＿２膜无１．７ｎｍ以上的孔，而用硅溶胶制得的ＳｉＯ＿２膜平均孔径为７．５ｎｍ，且孔径分布狭窄。用ＴＥＯＳ作原料可在载体α－Ａｌ＿２Ｏ＿３上制得无大孔缺陷厚约０．８μｍ的ＳｉＯ＿２膜，膜的纯氮气渗透表现出Ｋｎｕｄｓｅｎ扩散特征。制膜时涂膜－干燥循环不少于三次才可避免产生大孔缺陷。     

CeO2基电解质材料的扫描电镜观察

用Ｓｍ２Ｏ３和Ｇｄ２Ｏ３共同掺杂ＣｅＯ２基电解质组分（ＣｅＯ２）０．９（Ｓｍ２Ｏ３）０．０５（Ｇｄ２Ｏ３）０．０５随着烧结温度的提高，晶粒持续长大，由１４００℃烧结时的２－３μｍ长大到１６００℃烧结时的１０－１２μｍ，单位尺寸内的晶界数量减少；各温度烧结样品的断口都呈穿晶断裂。     

超细活性重晶石生产工艺研究

将含ＢａＳＯ２９４．５％的重晶石矿经雷蒙磨初级粉碎，酸洗，五级湿法剥片超细粉碎等处理可获得超细产品，其粒度组成：ｄ１０＝０．１μｍ，ｄ５０－０．４５μｍ，ｄ９０＝１．４５μｍ。粉料经稀硫酸处理，可提高其白度及耐候等性能，在剥片中加入活化剂可在超细粉碎的同时进行活化处理。     

氯化物法制备MCFC隔膜用α-LiAlO2细料的研究

用氯化物法制得α－ＬｉＡｌＯ３细料。两种反应物料分别在６５０℃和５５０℃反应１ｈ，生成α－ＬｉＡｌＯ２。经过水洗等，产生水合作用，生成水合物（ＬｉＡｌＯ２）２．５Ｈ２Ｏ．此水合物失水后，又变为α－ＬｉＡｌＯ２细料。其粒度分别为０．３３μｍ和０．４５μｍ。反应物的粒度和性质及反应温度等对产物α－ＬｉＡｌＯ２粒度均有一定影响。在本方法中，吸入反应机理仍起主要作用。以此细和粗α－ＬｉＡｌＯ２粉料为原料，     

Al2O3—Si3N4—ZrO2多相复合材料在燃煤MHD发电中的应用

采用Ａｌ２Ｏ３基料，添加第二相（ＺｒＯ２，Ｓｉ３Ｎ４）和纤维相（ＺｒＯ２，（ｆ），以热压法制成Ａｌ２Ｏ３－Ｓｉ３Ｎ４－ＺｒＯ２多相复合材料。研究表明，新材料在青静态和动态试验中表现出良好的综合性能：１０７３Ｋ时的高温电阴率ｐ＝１．２４×１７＾７Ω．ｃｍ；静态熔渣最大腐蚀速率Ｖｓ＝０．１６μｍ／ｈ；动态最大腐蚀速率Ｖｄ＝０．４４９μｍ／ｈ。与Ａｌ２Ｏ３陶瓷相比，室温抗弯强度提高９３％，抗热震临界...     

纺锤形α—FeOOH粒子制备

本文通过液相法利用ＦｅＳＯ４和Ｎａ２ＣＯ３为原料制备纺锤形α－ＦｅＯＯＨ超细粒子，考查反应温度、浓度和碱比等工艺配方以及加料方式、通气量及搅拌转速等宏观工程因素对最终α－ＦｅＯＯＨ粒子形貌的影响，成功地制备出大小为０．２μｍ左右，轴比３－４，均匀，无枝杈的纺锤形α－ＦｅＯＯＨ粒子。     

乙二酸钙酸解制乙二酸工艺研究

钙化法制乙二酸其主要反应是用硫酸酸解乙二酸钙的反应过程，通过实验确定ＳＯ２－４—Ｃａ２＋相图，从而找到ＣａＳＯ４·２Ｈ２Ｏ结晶成长区和自发成核区。用数学模型指导投料，能得到较理想结晶粒度，过滤速率高达０．７５ｍ３·ｍ－２·ｍｉｎ－１。     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料，介绍了2005—2006年国外塑料工业的发展情况。提供了世界塑料产量、消费量及全球各类树脂生产量以及各国塑料制品的进出口情况。作为对比，介绍了中国塑料的生产情况。按通用热塑性树脂（聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂）、工程塑料（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序，对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯·硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、不饱和聚酯树脂、环氧树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍.     

Inorganic/organic nanocomposite coatings: The next step in coating performance

Inorganic/organic hybrid materials have considerable promise and are beginning to become a major area of research for many coating usages, including abrasion and corrosion resistance. Our primary approach is to prepare the inorganic phase in situ within the film formation process of the organic phase. The inorganic phase is introduced via sol-gel chemistry into a thermosetting organic phase. By this method, the size, periodicity, spatial positioning, and density of the inorganic phase can be controlled. An important aspect of the inorganic/organic hybrid materials is the coupling agent. The initial task of the coupling agent is to provide uniform mixing of the oligomeric organic phase with the sol-gel precursors, which are otherwise immiscible. UV-curable inorganic/organic hybrid systems have the advantages of a rapid cure and the ability to be used on heat sensitive substrates such as molded plastics. Also, it is possible to have better control of the growth of the inorganic phase using UV curing. It is our ultimate goal to completely separate the curing of inorganic and organic phases to gain complete control over the morphology, and hence optimization of “all” the coating properties. Thus far, it has been found that concomitant UV curing of the inorganic and organic phases using titanium sol-gel precursors afforded nanocomposite coatings which completely block the substrate from UV light while maintaining a transparent to visible light. Also, it has been found that the morphology of the inorganic phase is highly dependent on the concentration and reactivity of the coupling agent. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004, in Chicago, IL.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Some Large Wood-Boring Beetles in Southeastern USA

Ethanol and α-pinene were tested as attractants for large wood-boring pine beetles in Alabama, Florida, Georgia, North Carolina, and South Carolina in 2002–2004. Multiple-funnel traps baited with (−)-α-pinene (released at about 2 g/d at 25–28°C) were attractive to the following Cerambycidae: Acanthocinus nodosus, A. obsoletus, Arhopalus rusticus nubilus, Asemum striatum, Monochamus titillator, Prionus pocularis, Xylotrechus integer, and X. sagittatus sagittatus. Buprestis lineata (Buprestidae), Alaus myops (Elateridae), and Hylobius pales and Pachylobius picivorus (Curculionidae) were also attracted to traps baited with (−)-α-pinene. In many locations, ethanol synergized attraction of the cerambycids Acanthocinus nodosus, A. obsoletus, Arhopalus r. nubilus, Monochamus titillator, and Xylotrechus s. sagittatus (but not Asemum striatum, Prionus pocularis, or Xylotrechus integer) to traps baited with (−)-α-pinene. Similarly, attraction of Alaus myops, Hylobius pales, and Pachylobius picivorus (but not Buprestis lineata) to traps baited with (−)-α-pinene was synergized by ethanol. These results provide support for the use of traps baited with ethanol and (−)-α-pinene to detect and monitor common large wood-boring beetles from the southeastern region of the USA at ports-of-entry in other countries, as well as forested areas in the USA.