利用透辉石一次快烧瓷质外墙砖的研究

本文研究了以透辉石为主要原料，结合钠长石、镁质泥等，通过合理配比，辊道窑上一次快速民瓷持外墙砖，烧成温度１１５０℃，烧成时间〈５０分钟。     

高强度镁质日用瓷的性能研究

以MgO-A12O3-SiO2三元系统相图为理论依据确定镁质瓷配方范围。通过考察滑石用量、长石用量、高岭土用量、烧成温度对镁质瓷抗折强度的影响,对镁质瓷配方进行优化,得到抗折强度较高(160.5MPa)、白度高的镁质日用瓷配方。     

浅析钠长石在日用陶瓷中的应用

本文分析了钠长石能在日用瓷中应用的理论依据,证明钠长石引入瓷坯后可增加液相SiO2含量,降低瓷坯瓷化强度,且在成瓷强度下具备抗变形能力。||关键词##4钠长石;;长石质日用瓷;;低温烧成     

镁质瓷的研究现状及进展

为解决镁质瓷坯料工艺性能较差、烧成范围较窄、泥浆流变性能较差、产品制备控制不当容易老化等现实问题,广大学者以MgO-Al_2O_3-SiO_2三元为基础通过设计正交实验对坯体配方进行筛选优化,引入滑石、粘土、助熔性或溶剂型等原料,并对滑石进行预烧、原料细磨,克服了工艺因素对镁质瓷的影响,针对上述问题提出了相应的解决措施。本文对近期有关镁质瓷的研究进行了梳理和分类,并对镁质瓷今后在拓展原料来源等提出建议。     

用于镁质强化瓷的大红釉的研制

以硅酸锆包裹硫硒化镉[ZrSiO4@Cd(SxSe1-x)]为色料,长石-石灰混合生料为基釉,研制了一种适用于镁质强化瓷装饰用大红釉,研究了基釉的组成、升温速率、停留时间和燃烧气氛对呈色效果的影响。实验结果显示,该釉在氧化气氛烧成,烧成温度范围在1170～1250℃,釉料呈现鲜艳的大红色,适合用于镁质强化瓷,且完全无铅镉溶出。     

强化瓷概述

强化瓷(DURABLE CHINA)是国外市场上价高、畅销的日用瓷.它的主要特点是,材质抗冲击抗弯强度高;制品器型一般为外卷边;其重量较厚胎炻器轻;较厚胎炻器薄.强化瓷在烧成过程中瓷胎高温结构强度高,烧成变形小,强化瓷制品不易碰破口沿、耐用.颇受消费者喜爱.我们收集了一些有关强化瓷方面的资料及实物,并进行了检测及研究,现综述如下,仅供同行在试制强化瓷中参考.     

利用透辉石一次快烧瓷质外墙砖

本文研究了以透辉石为主要原料，结合钠长石、镁质泥等，通过合理配方，辊道窑上一次快速烧成瓷质外墙砖。烧成温度１１５０℃，烧成周期５０分钟。     

镁质强化瓷装饰用无铅无镉溶出大红釉的研究

研制一种适用于镁质强化瓷装饰用大红釉。该釉以包裹型镉硒为色料,以长石一石灰为基釉混合生料釉,氧化气氛烧成,烧成温度为1150-1270℃,釉料无铅镉溶出。同时研究了基釉的组成、升温速率、保温时间和燃烧气氛对呈色效果的影响,并获得了制备镁质强化瓷装饰用无铅无镉溶出大红釉制备技术。     

利用透辉石一次快烧瓷质外墙砖的研究

本文研究了以透辉石为主要原料，结合钠长石、镁质泥等，通过合理配比，辊道窑上一次快速烧成瓷质外墙砖，烧成温度１１５０℃，烧成时间＜５０分钟。     

镁质强化瓷装饰用无铅无镉溶出大红釉的研究

研制一种适用于镁质强化瓷装饰用大红釉.该釉以包裹型镉硒为色料,以长石-石灰为基釉混合生料釉,氧化气氛烧成,烧成温度为1150~1270℃,釉料无铅镉溶出.同时研究了基釉的组成、升温速率、保温时间和燃烧气氛对呈色效果的影响,并获得了制备镁质强化瓷装饰用无铅无镉溶出大红釉制备技术     

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.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

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.     

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.     

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。