稀土元素在搪瓷色釉上的应用

稀土元素早已应用于玻璃、陶瓷工业,但在搪瓷工业上应用较晚,近几年来有研制成功稀土搪瓷颜料,如稀土粉红、稀土黑、稀土黄等。还有将稀土做为搪瓷釉浆悬浮剂代替粘土悬浮剂也获成功。还有文章报道将单一稀土应用于搪瓷釉浆。本文主要是利用稀土元素具有特殊的原子结构,电子层中     

窑灰生产搪瓷钛白的研究

研究了用窑灰生产搪瓷钛白的技术路线和工艺控制条件，找出了一条用窑灰生产高质量搪瓷钛白的技术路线。     

窑灰生产搪瓷钛白的研究

本文研究了用窑灰生产搪瓷钛白的技术路线和工艺控制条件，找出了一条用窑灰生产高质量搪瓷钛白的技术路线。     

宝钢开发出一次搪瓷用冷轧板

日前，宝钢一次搪瓷用冷轧钢板开发取得成功。首批约240吨钢板通过了出厂检验，钢板的化学成分、力学性能等各项指标完全达到设计要求，产品已发往用户。这标志着宝钢在搪瓷钢新品开发中又取得了突破。     

基于专利分析的搪瓷钢技术发展现状研究

搪瓷钢因兼具钢板的强度、柔韧性和搪瓷的耐高温、耐腐蚀、易清洁、美观等优点,广泛应用于轻工、家电、冶金、化工、建筑等行业。本文运用专利情报分析方法,通过对近三十年搪瓷钢技术领域专利的分析,研究了搪瓷钢技术发展现状,以期为相关政府部门、企业和高校院所进一步发展搪瓷钢技术提供决策参考。     

热轧化工搪瓷钢板的生

近年来,随着我国化工、医药工业的发展,对搪瓷钢板的需求量剧增。为了生产出综合性能好、成本低的化工搪瓷专用钢板,以满足用户的急需,武钢从1986年开始研制,1988年转入生产。本文主要介绍轧板厂生产的热轧化工搪瓷钢板合理的化学成分、适宜的冶炼和控轧工艺,以及搪瓷钢板的性能和用户的使用情况。实践表明,武钢成功地研制并生产出了用户满意的化工搪瓷钢板,从而为国家提供了理想的化工搪瓷专用钢材。     

冷轧搪瓷钢板抗鳞爆性能研究

采用双电解池,研究了冷轧搪瓷钢板抗鳞爆性能试验方法,测量了DC01、DC05冷轧钢板的TH值.结果表明,试验钢的鳞爆性能测量结果与实际涂搪瓷结果完全一致,说明本文的试验方法可快速评定冷轧搪瓷钢板的抗鳞爆性能.     

不同软质粘土对粘土质制品性能的影响

介绍了四种软质粘土对粘土制品性能的影响，实践证明，无论运用四种软质粘土的哪一种，都可以生产出合格的粘土制品。     

工业搪瓷烧成炉的技术改造及其效果

1前言目前，在我国工业搪瓷行业中，搪瓷的烧成，绝大多数是采用重质耐火材料砌成的火道式马弗炉，由于炉型结构的决定，该炉型的最大缺点是热效率低，仅有15％左右，这与国外30％以上相比，相差甚远；除此之外，还有建炉占地面积大，筑炉费用高，维修频繁等缺点。随着燃料价格的上涨，以及复关后我国经济将全面步入国际经济大循环，能耗过高成本过大的矛盾将是十分突出的问题。节能降耗是保证我国经济持续稳定协调发展的重要环节。对于工业搪瓷烧成也不例外，烧成炉间节能型方向发展是事在必行了。我国北方某化工设备厂，是我国生产工业搪…     

芦城河阶地粘土土质分析

粘土是水泥生产的主要原料，本文简介了芦城河阶地粘土的分布情况，分析了粘土的土质特征及使用价值。分析结果表明，芦城河队地粘土储量大，成分含量基本符合规定标准，完全可作生产水泥用的原料。     

董东矿沿空留巷切顶卸压对底板受力影响分析

以董东矿50107工作面为研究对象,通过数值模拟软件FLAC3D建立模型,对比分析窄矿柱、宽矿柱以及切顶沿空留巷情况下围岩及底板受力特征,确定切顶沿空留巷切顶对围岩的卸压作用。对比分析围岩受力情况,表明切顶沿空留巷卸压效果比较明显,对比分析围岩塑性区的底板破坏深度,表明有利于切顶沿空留巷卸压效果明显,切顶沿空留巷有很好的卸压效果,有利于矿山巷道围岩控制。     

销钉根部裂纹产生原因分析

对TP304H钢管螺柱焊销钉根部产生的裂纹进行分析,寻找裂纹产生的原因并提出改进的方案。     

矿山地质构造沉降监测中水工环地质调查的作用分析

为了保障矿山企业的发展与矿山地质自然环境形成协调的发展模式,应对矿山深层水位的沉降进行检测,水工环地质调查是确定矿山地下水位深度的有效手段之一。基于此,开展对矿山地质构造沉降监测中水工环地质调查的作用分析研究,通过研究得出,水工环地质调查可以提高矿山地质构造沉降监测结果精准度、为矿山地质构造沉降提供应急方案、保障矿山地质构造沉降监测工作效率等作用,对实现矿山企业的精细化施工提供有利条件。     

加强烧结过程控制与稳定烧结矿质量

烧结矿的金属性能包括机械强度、氧化还原性和强度稳定性项指标,而影响这些因素种类繁多、错中复杂。介绍了烧结厂通过加强对烧结全过程的控制,稳定烧结矿金属质量的方法和效果。     

Characteristics of the sympathetic innervation of the nictitating membrane and of the vasculature of the nose and tongue of the cat

Vasomotor responses from the nasal mucosa and tongue, and contractions of the nictitating membrane, were recorded on stimulation of the cervical sympathetic or internal carotid nerves. Preganglionic sympathetic nerve fibres which elicited a membrane response possessed a lower threshold than those which evoked nasal vasoconstriction, while the latter displayed a lower threshold than fibres which evoked tongue vasoconstriction. The sympathetic vasodilator fibres to the tongue whose activity was revealed after alpha-receptor blockade, had a similar threshold to the vasoconstrictor fibres. Membrane contraction, nasal vasoconstriction and occasionally tongue vasoconstriction could be evoked by stimulating the internal carotid nerve. The postganglionic fibres innervating the nasal mucosa had a similar threshold to those of the nictitating membrane, which may indicate that there are small myelinated fibres innervating the mucosa. The preganglionic compound nerve action potential had four major components, S1-S4. S1, S2 and usually S3 fibres were associated with membrane contraction; S2, S3 and sometimes S1 fibres were associated with nasal vasoconstriction; and S3, usually S2 and occasionally S1 fibres were associated with vasoconstriction in the tongue. It is concluded that each of these three groups of nerve fibres, but not S4 fibres, may include fibres associated functionally with the three effectors. There was a considerable difference between the relative amplitude of the responses of the three effectors elicited by stimulation of the cervical sympathetic nerve at frequencies between 0.2 and 2 Hz. Vasoconstrictor responses were relatively larger than membrane contractions suggesting differences in the mechanisms of neurotransmission at the neuroeffector junctions.     

Effect of cyproheptadine on the ultrastructure of the neurons of the arcuate nucleus in the hypothalamus of the rat

The data are presented on changes in the rat arcuate nuclear neuron ultrastructure after using cyproheptadine (peritol, Egyt Pharmaceutical Works, Hungary) in a water suspension at a dose of 20 mg/kg once daily during 7 successive days and twice a day within 10 days. It was shown that cyproheptadine decreases the functional activity of the arcuate nuclear neurons, depending on the total amount of the drug used. Cyproheptadine-induced inhibition of the forming neurohormone release from neurons is likely to be one of the mechanisms of its therapeutic effect in Itsenko-Cushing's disease.     

铸造起重机端梁铰接轴联接固定结构的改进设计

八钢二炼钢区域的大吨位冶金铸造起重机为四梁四轨双小车结构,在使用过程中出现连接固定失效、铰接轴非正常磨损的情况。起重机端梁铰接点连接失效会造成起重机主梁与副梁分离的严重设备事故。介绍了对原设计的结构方式进行的改进设计,改进后消除了铰接连接失效的事故隐患。     

抛光时间和表面粗糙度对硬度测试数据的影响

本文讨论抛光时间和表面粗糙度对金属材料布氏硬度测试数据的影响。试验结果指出,随着样品抛光时间的延长,HB值波浪式地变化;随着表面粗糙度的降低,HB值逐渐变小。分析指出,前者与抛光过程中磨面金属的加工硬化和随后的消失、及其循环往复有关;后者则是由表面粗糙度降低后,磨面上加工硬化层的减薄引起的。上述变化规律还受金属材料原始硬度的明显影响。     

纳米SiO2含量对铜基摩擦材料摩擦学性能的影响

采用粉末冶金法制备了添加纳米SiO2的铜基粉末冶金摩擦材料,经湿式摩擦材料摩擦性能试验机测试,研究了纳米SiO2添加量对摩擦材料的摩擦系数、磨损率和耐热系数的影响.结果表明:随纳米SiO2质量分数从0增加到1.5%,材料的动摩擦系数先减小后增加,静摩擦系数无明显变化;耐热系数逐步提高;磨损率则先减小后增加;纳米SiO2质量分数为0.75%的材料性能最佳.研究认为:纳米SiO2对铜基湿式摩擦材料的摩擦学性能有显著影响,添加适量的纳米SiO2可使材料具有高而稳定的摩擦系数、优异的耐磨性和耐热性等综合性能.     

Structure of the attachment of the vocal ligament to the perichondrium of the thyroid cartilage

The ventral attachement of the ligamentum vocale of eleven larynges (new-born and adults has been studied in sagittal, frontal and horizontal sections. 1. Supplementary to the known structure of the ventral attachement of the ligamentum vocale we have noticed collagen fibers which ascend in the inner angle of the thyroid cartilage and which partly cross to the other side. Sometimes a few fibers which are running downward have been observed. This structure of the attachement must be more firm than the known structure. 2. Moreover it has been observed that a lot of the angles of the crossing collagen fibers in the cartilage of the lamina mediana (near the attachement of the ligamentum vocale) are right-angled, whereas the angles of the fibers which lie in the laminae laterales in their majority are acute-angled. This phenomenon also is interpreted as a structure which makes the lamina mediana firmer. The fact, that this structure is not so evident in the specimens of the new-born as in those of the adults indicates that there are postnatal changes in the structure of the lamina mediana.