DATA ON VISCOSITY OF INDIANA CLAY SLIP WITH ELECTROLYTES IN REGARD TO THE CASTING OF TERRA COTTA1

A presentation of data on the use of several electrolytes with one particular clay, to wit: Indiana clay, such as is used by the terra cotta manufacturers of the Chicago district. The various electrolytes used were sodium carbonate, sodium silicate, the two combined half and half, gallic acid, and tannic acid. Data was obtained by determining relative viscosities with the use of a flow viscosimeter, and by measuring the thickness of wall cast in a given time. Sodium carbonate, used alone, seemed to be the most satisfactory. Tannic acid shows possibilities, but so much is required as to be commercially impractical.     

注浆成型法制备氧化铝陶瓷弯管

以氧化铝为主要原料,采用注浆成型法制备氧化铝陶瓷弯管。论文比较详细地研究了pH值、颗粒级配和有机粘结剂对产品性能的影响。结果表明:当pH值为1,粘结剂为2wt%获得的泥浆粘度最小;用颗粒大小4μm的100%α-Al2O3细粉制备的氧化铝陶瓷弯管气孔率最小、表观密度最大、显微结构最理想。     

卫生陶瓷压力注浆成型的泥浆性能研究

研究了卫生陶瓷压力注浆成型的泥浆性能，通过一系列试验，讨论了泥浆性能对压力注浆成型的影响。     

两组分混合电解质对陶瓷注浆泥流动性的影响

本文通过对用黑泥取代苏州土后的陶瓷注浆泥进行电解质稀释实验，确定加入两组分混合电解质水玻璃和六偏磷酸钠且加入量分别为0-21%-26％和0．2%-0．25％时，陶瓷注浆泥流动性较好。     

粘度调节剂对制备环氧树脂微球的影响

研究粘度调节剂对环氧树脂/二氨基二苯基砜/聚醚酰亚胺(EP/DDS/PEI)共混物相结构及制备EP微球的影响。结果表明,共混物中加入粘度调节剂后,固化过程中共混体系的粘度明显降低,随着粘度调节剂用量的增加,EP分散相尺寸逐渐增大,制得的EP微球粒径及粒径分布指数逐渐增大。EP微球的红外光谱显示粘度调节剂对EP微球的成分和相结构没有明显影响。     

NOTES ON CASTING SLIP1

This is a note showing the unreliability of viscosimeter control for casting slip. A rule is given for control of the “hardness” and thickness of slip.     

镀膜工艺对溶胶-凝胶法制备钛酸铝薄膜的影响

采用溶胶-凝胶法,以钛酸四丁酯(Ti(OC4H9)4)和硝酸铝(Al(NO3)3·9H2O)为前驱体,乙醇为溶剂,利用硝酸铝中所含的结晶水代替水解反应所需的外加水,在莫来石基片上制备钛酸铝薄膜.借助偏光显微镜、SEM和XRD研究了提拉速度、浸渍时间和镀膜次数等镀膜工艺参数对镀膜效果的影响.研究结果表明:采用浸渍-提拉法,浸渍提拉速度为1mm/s、每次浸渍时间为30s,经过3次镀膜可以在莫来石基片上制备出均匀、致密、高质量的钛酸铝薄膜.     

THE REQUISITE CONSISTENCY FOR A CASTING SLIP1

Producing desirable flowing quality in a slip is proposed as a means of controlling its casting quality. A conception of plastic flow as a property incapable of being measured in terms of an absolute unit such as may be applied to viscosity measurement is presented and a simple gravity flow tube consistometer of suitable dimensions for obtaining comparative tests upon casting slips or upon similar suspensions is described. Only sufficient data are presented to aid in explaining or describing general principles or conceptions, to suggest means of obtaining desirable plastic flow and to show what the consistency of a vitreous sanitary ware casting slip now in use actually is. Stiffness, yield value, and starting pressure are regarded as the elements making up plastic flowing quality and it is necessary to take all three of these factors into account in order to specify the kind of flow obtained. The consistency of a casting slip which will produce good solid cast ware, described in terms of the test apparatus used in connection with this work, may be stated as follows: stiffness equals 60 cm. per cc. per sec.; yield value equals 20 cm.; plasticity ratio equals 2.5. Reference has also been made to the application of these Same principles to the control of glaze slips and to the testing of clays to determine their suitability for use in any process involving their plastic working properties     

TECHNICAL NOTE: THE EFFECT OF SLIP ON THE FLOW IN A ROTATING CHANNEL

Slip flow occurs in a wide variety of practical chemical engineering processes. This work models, for the first time, the interaction of surface slip and system rotation normal to the flow direction. It is found that the flow fields are affected considerably. For Poiseuille flow, slip increases the longitudinal flow rate at low rotation, but decreases it at high rotation. For Couette flow, slip decreases the longitudinal drag. The solutions are also exact solutions of the Navier-Stokes equations.     

EFFECT OF SET OF ENAMELS ON HYDROMETER READINGS OF THE SLIP *

The operation in enameling that is the most difficult to control is the setting up of enamels for dipping. The difficulty occurs because there has been no practical accurate method for measuring the set of the enamel. Practical experience shows that viscosity is not an indication of the set or of the dipping weight. The method presented consists in determining the apparent specific gravity of the enamel slip with true value for the specific gravity. Calculations give a numerical value for the value of the set or yield point. The measurements are accurately reproducible, and dipping weights have been found to correlate quite well with the results given of tests in laboratory and plants.     

浇注型聚氨酯弹性滑轮原液的研制

研制了浇注型聚氨酯弹性滑轮原液。讨论了配制聚氨酯原液所用的原料对产品性能的影响,确定了配方设计方案。简述了原液的合成工艺。     

液相法制备锆钒蓝色料的研究

介绍了以正硅酸乙酯Si（C2H5O4）、氧氯化锆（ZrOCl2）和氧氯化钒（VOCl3）等为原料,以水和乙醇为介质制备V-ZrSiO4蓝色料超细粉的方法。其中钒均匀地分散固溶在ZrSiO4中,通过系统改变Zr/Si(摩尔比）和V的固溶量可获得最佳呈色效果。通过XRD、DTA-TG和红外光谱的测试和分析明确了在加热过程中颜色变化与钒在ZrSiO4中固溶量的关系,及V^4 取代ZrSiO4中部分Zr^4 形成固溶体的结论。     

植酸钠水解制取肌醇新工艺研究

开发了用离子交换树脂吸附法以玉米浸渍水为原料制得的植酸钠,再进行加压水解制取肌醇的新工艺。通过正交试验确定了最佳工艺条件,肌醇的平均收率达到０．１６％,产品质量达到国家药典标准。     

合成方法对Span产品的结构和组成的影响

采用高效液相色谱（ＨＰＬＣ）对一步法工业品、分步催化法和两步法国外样品进行组成分析，考察了不同合成方法对产品的组成及结构的影响。     

EFFECT OF SUSPENSION VISCOSITY ON POWER CONSUMPTION IN THE AGITATION OF SOLID-LIQUID SYSTEMS

The effect of suspension viscosity on power consumption in fully baffled stirred tanks is investigated phase solid-liquid two

It is shown that the adoption of a propeir definition for the apparent viscosity makes it possible to correlate the data of single- and two-phase systems with the same power curve regardless of the flow regime.     

SiC陶瓷的浇注成型初探

从Ｚｅｔａ电位的角度出发，对泥浆粘度、泥浆稳定性以及素坯密度进行了调整和比较，解决了ＳｉＣ泥浆制备及其浇注中的一些问题。用３种ＳｉＣ原料，浇注成型后素坯密度、无压烧结后烧结密度和烧结样品的抗弯强度分别达１．６６ｇ／ｃｍ＾３（５１．７％），２．９３ｇ／ｃｍ＾３（９１．３％）和２６８ＭＰａ。     

EFFECT OF SUSPENSION VISCOSITY ON POWER CONSUMPTION IN THE AGITATION OF SOLID-LIQUID SYSTEMS

The effect of suspension viscosity on power consumption in fully baffled stirred tanks is investigated phase solid-liquid two

It is shown that the adoption of a propeir definition for the apparent viscosity makes it possible to correlate the data of single- and two-phase systems with the same power curve regardless of the flow regime.