石英玻璃和铅玻璃中硼离子注入的影响

石英玻璃和碱-铅硅酸盐玻璃样品在室温下注入150-keV B~ (4×10~(15)ions/cm~2)。用二次离子质谱测量了注入硼离子的深度分布。指出硼离子浓度随深度变化符合高斯分布。通过对铅玻璃和石英玻璃的X射线光电子能谱的详细研究,发现硼离子注入后氧和硅的结合能峰稍有位移。O_(1s)向高结合能变化且桥氧离子的相对浓度增加。     

HGAFS法代替GFAAS法测定水中的硒

用氢化物发生—原子荧光分析技术(HGAFS)和石墨炉原子吸收分光光度法(GFAAS)对水样中硒的测定进行了多方面的比较。通过一系列实验，设定了最佳仪器测量条件，并从其线性范围、最低检出限、精密度、准确度、回收率等方面进行对比实验。结果表明：HGAFS比GFAAS检出限低、精密性好、回收效果好、基体干扰少，且快速方便，完全可代替GB／T 15505—1995的GFAAS法，具有很好的可行性和适用性。     

石英玻璃中羟基的脱除与石英原料的识别选择

本文描述了石英玻璃管材料在高温脱羟过程中，羟基无法脱除的主要原因及石英原料的识别、选择与处理的关系，对石英玻璃材料中羟基的形成及脱除的影响。在东海产石英玻璃原料中，生产脱羟透明石英玻璃管材料的过程中，对于东海石英玻璃原料的识别、选择与技术处理是极为重要的。这是由于东海石英原料的特殊原因所致。在以往石英玻璃管材料生产与研究过程中，成功实现了用硅石对水晶原料进行了替代，扩大石英玻璃原料来源，突破石英玻璃材料生产因原料来源、价格等诸多制约因素所形成的发展瓶颈。本研究主要针对东海低羟基石英玻璃原料，阐述对东海石英原料的认识与理论观点，并与大家一起讨论。     

钛白面釉低硼试验初探

笔者以自己多年从事瓷釉配方工作的经验，提出低硼－1^#和低硼－2^#配方及工艺，使钛白釉中氧化硼含量降到6．10％。     

视镜玻璃板爆破试验

前言视镜在炼油、化工设备上应用甚多。视镜的主要零件为视镜玻璃板。它与设备内的介质接触,承受工作压力与介质温度。制造视镜玻璃板的材质有硼硅玻璃、钠钙玻璃、石英玻璃与有机玻璃等,但通常采用硼硅玻璃。硼硅玻璃的主要成份为元素硼、硅。由于硼硅玻璃的软化点高,故它能承受较高的介质温度。硼硅玻璃经钢化处理后,机械强度能提高较多。它的抗腐蚀能力优于钠     

石英玻璃陶瓷坩埚的研究与应用

利用石英玻璃废料，按照传统陶瓷成形基本工艺，研制出了用于熔化玻璃用的石英玻璃陶瓷坩埚。研究了影响石英玻璃陶瓷材料的诸多因素，探讨和分析了提高材料致密性的方法。     

熔制气氛对石英玻璃中羟基含量及稳定性的影响

以Ⅲ类石英玻璃为研究对象,从实际试验熔制角度,探究了不同熔制气氛下石英玻璃沿径向方向上羟基的含量及分布情况,并对羟基的形成原因及稳定性进行了初步分析。结果表明,不同熔制气氛下的石英玻璃中羟基分布均呈现出中间高边缘低,中性气氛中羟基含量最低,还原气氛中羟基含量最高。停料空烧方法可改善原有氧化气氛中石英玻璃产率较低的情况,但会导致砣面表面不平整,边缘羟基含量大幅增加。不同熔制气氛下的石英玻璃经高温热处理后羟基含量趋于一致,还原气氛下的降幅最大,约55%。     

石英玻璃原料流动性的研究及测试方法

石英玻璃原料在连熔法生产石英玻璃管的过程中，石英玻璃原料的流动性技术指标，直接影响到石英玻璃熔炉熔化过程中的下料、熔化、澄清、均化工艺的稳定性，也是石英玻璃原料在生产过程中的一项重要技术指标。为此，本文就石英玻璃原料的流动性测试方法进行研究与讨论。     

石英陶瓷的研究进展及其应用

石英陶瓷又称熔融石英陶瓷、石英玻璃陶瓷、石英玻璃烧结制品，它是以熔融石英块或石英玻璃为原料，经过粉碎、成形及烧成等工序而制成的一种烧结体，对有些外观要求较高的产品还要经过冷加工才可制得。它具有膨胀系数低，体积稳定性好，在砌筑时可以不留膨胀缝；热传导率较低，且在1000℃以下的温度范围内几乎不变，是一种极好的隔热材料.     

2003年高新技术产业用石英玻璃发展动态与经济分析

高新技术产业用石英玻璃包括四个方面产品：半导体工业用石英玻璃、光通信技术用石英玻璃、激光技术用石英玻璃和军事工业用石英玻璃(包括航天技术和核工业用石英玻璃)。2003年总营销额约为3．1亿人民币，同比增长7％左右，其发展动态和经济分析如下。     

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。