高温快烧活性石灰的工艺条件研究

通过对石灰石高温快烧，研究了石灰石粒度、煅烧温度、保温时间等因素对石灰活性的影响。确定了高温快烧活性石灰的最佳煅烧工艺条件，为高温快烧活性石灰的生产提供工艺控制参数。     

锂瓷石在高温快烧白瓷生产中的应用

本文研究了江西锂瓷石的工艺性能,初步探讨了其在高温一次快烧白瓷方法的应用,取得了一定效果。实验证明江西锂瓷石是一种优质的高温快烧白瓷原料。     

高温快烧陶瓷颜料

高温快烧陶瓷颜料是70年代初期发展起来的一类新型彩绘颜料,它兼有釉上、釉下颜料的许多特点:色彩绚丽、抗酸碱性好、抗机械磨损力强、铅溶出量极低,在国际市场上获得一致好评。过去仅西德、日本等少数国家能生产这种颜料。目前我国淄博硅研所和宜兴、唐山、江西陶研所已分别研究出高温快烧颜料,并取得了较好的效果。经过一年来的努力,江西陶研所颜料组现已研制成功红、黄、兰、绿、黑、褐、海碧等七种高温快烧颜料。为生产高档瓷提供了一类新型的无铅陶瓷颜料。本文对高温快烧颜料的研制过程、彩烧工艺、瓷釉配方、抗蚀性能作了比较详细的介绍,丰富了我们对高温快烧颜料的认识,但采用高温快烧颜料作瓷器装饰才刚刚开始,在提高颜料质量、增加品种等方面还有大量的研究试验工作,有待进一步探索。我们希望今后能加强这方面的试验和总结,使高溫快烧颜料更好地为瓷业生产服务。     

高温快烧网带窑的设计

1前言为了推广应用“高温快烧釉中彩”,根据生产厂家的实际情况,在吸取其他厂家的先进经验和釉中彩高温辊道窑成功经验的基础上,设计了本条高温快烧网带烤花窑。本设计根据以下几点：（1）满足高温快烧“釉中彩”的彩烧工艺要求。（2）也可用于普通釉上贴花彩烧的生产。（3）适应大件及多品种的生产,能烤烧高档日用陶瓷、普通陶瓷、焦宝石瓷等成套餐具、茶具、咖啡具,满足高低温烤烧工艺要求。2烤烧曲线周期、温度范围及生产能力的确定2．1烤烧曲线的制定快速烤烧时,必须注意的关键温度范围是30Ot－SO0t,在这个范围内油质挥发和薄…     

釉中彩绘初探

一、釉中彩的特点釉中彩是七十年代发展起来的新型陶瓷装饰。它是在瓷胎釉面上绘制花纹后,经高温一千二百四十度左右快速彩烧而成的。彩烧后,颜料沉入釉中,使画面呈现出晶莹润泽、柔和雅丽之感,有近似釉下彩的效果,故得名釉中彩。又因釉中彩必须在高温快烧的条件下彩烧,所以又名高温快烧颜料装饰。     

日用瓷还原焰辊道窑的热工性能及控制工艺

本文阐述了汉索夫日用瓷还原焰自动控制辊道窑的主要技术参数、窑炉的结构组成、热工性能及工艺控制等情况。经过反复试验，不断的摸索，获得了最佳的高档高温硬质瓷快烧的生产控制方法，以及适合辊道窑快烧的坯釉料配方。经检测，产品的釉面质量和白度达到了德国和日本高档瓷的水平。     

陶瓷文摘——“快烧”之一

陶瓷坯、釉和高温彩饰的快烧《国际陶瓷评论》1972,21(4),291——4 (英)介绍 Riedhammer 公司的各种类型快烧窑炉的概况,包括墙面砖快烧用窑炉,烧制温度为1000℃,时间80分钟。陶瓷工业用快烧设备的可能性《国际陶瓷评论》1971,20(4),300 (英)     

高温快速烧成琉璃瓦制造特点

论述了高温快速烧成琉璃瓦制造特点，揭示了影响琉璃瓦生产的因素有制粉燃料煤、成型粉质量以及成型设备等；提出了快烧琉璃瓦升温及冷却的烧成制度，对生产同类产品的企业具有指导意义。     

改善快烧瓷器结构与性能的措施

近年来，由于采用快烧工艺，烧成技术取得了显的进步，但快烧瓷器的质量下降引起了人们的注意。根据国外有关献资料，本阐述了快烧对瓷器的显微结构和性能的影响，并介绍了提高快烧瓷器性能的方法。     

骨瓷熔块关键技术研究

为解决传统含铅骨瓷熔块在使用中的各种危害问题,研制出无铅骨瓷熔块。在唐山客户使用过程中遇到釉泡、低成本高温快烧等问题。本文首先对釉泡、低成本高温快烧等问题产生的原因进行分析,分析结果对熔块的配方进行优化改进;然后针对客户生产现场的实际情况,对球磨机的球磨效率、窑炉的温度曲线进行调整。最后,通过对骨瓷熔块配方的优化和客户生产工艺的调整,使釉泡、低成本高温快烧等问题得到解决。同时通过有效对膨胀系数、软化点、熔块熔流的品质管控,无铅骨瓷熔块在唐山市场更有竞争力,客户的优等品率得到大幅提升,产品质量大幅提高。     

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.     

Many Drugs of Abuse May Be Acutely Transformed to Dopamine,Norepinephrine and Epinephrine In Vivo

It is well established that a wide range of drugs of abuse acutely boost the signaling of the sympathetic nervous system and the hypothalamic–pituitary–adrenal (HPA) axis, where norepinephrine and epinephrine are major output molecules. This stimulatory effect is accompanied by such symptoms as elevated heart rate and blood pressure, more rapid breathing, increased body temperature and sweating, and pupillary dilation, as well as the intoxicating or euphoric subjective properties of the drug. While many drugs of abuse are thought to achieve their intoxicating effects by modulating the monoaminergic neurotransmitter systems (i.e., serotonin, norepinephrine, dopamine) by binding to these receptors or otherwise affecting their synaptic signaling, this paper puts forth the hypothesis that many of these drugs are actually acutely converted to catecholamines (dopamine, norepinephrine, epinephrine) in vivo, in addition to transformation to their known metabolites. In this manner, a range of stimulants, opioids, and psychedelics (as well as alcohol) may partially achieve their intoxicating properties, as well as side effects, due to this putative transformation to catecholamines. If this hypothesis is correct, it would alter our understanding of the basic biosynthetic pathways for generating these important signaling molecules, while also modifying our view of the neural substrates underlying substance abuse and dependence, including psychological stress-induced relapse. Importantly, there is a direct way to test the overarching hypothesis: administer (either centrally or peripherally) stable isotope versions of these drugs to model organisms such as rodents (or even to humans) and then use liquid chromatography-mass spectrometry to determine if the labeled drug is converted to labeled catecholamines in brain, blood plasma, or urine samples.     

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.     

Novel polyurethane coating technology through glycidyl carbamate chemistry

Glycidyl carbamate chemistry combines the excellent properties of polyurethanes with the crosslinking chemistry of epoxy resins. Glycidyl carbamate functional oligomers were synthesized by the reaction of polyfunctional isocyanate oligomers and glycidol. The oligomers were formulated into coatings with several amine functional crosslinkers at varying stoichiometric ratios and cured at different temperatures. Properties such as solvent resistance, hardness, and impact resistance were dependent on the composition and cure conditions. Most coatings had an excellent combination of properties. Studies were carried out to determine the kinetics of the curing reaction of the glycidyl carbamate functional oligomers with multifunctional and model amines. Detailed kinetic analysis of the curing reactions was also undertaken. The results indicated that the glycidyl carbamate functional group is more reactive than a glycidyl ether group. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, on October 27–29, 2004, in Chicago, IL.