Document 5kDxBXMKvMegpXQj4boGwGMKe

* CF TAMIC ABSTRACTS :$ 1950 Charles S. Pearce, Editor Mary J. Gibb, Assislani Editor Thelma J. Cecil, Editorial Assistant Committee on Publications: K. C. Lyon, Chairman. Karl Schwartzwalder. R. E. Birch, and J. J. Canfield Technical Adviser*: L. G. Farber, Ralph Rose, and Betty T. Owen f Compiled by Tlie American Ceramic Society 2525 North High Street Columbus 2, Ohio 'i j i t 03 Development Co.). U. & .,481,823, Sept. 13.1940 (July 9. 1943).--la & proem for the manufacture of synthetic inorganic gels comprising silica vfaereia sanations ia the density of the (el products result from inadequate process controls, the method of compensatisf for the variations and thereby producing a product of more uniform density comprises forming a silica hydrogel, wash* inf the hydrogel with an aqueous medium havin( a constant pH value in the neutral to slightly aUcaline ranfe, thereafter washing the hydroyel with an aqueous medium having a constant acid pH value, maintainin* the total length of the two washing treatments constant, and varying the lengths of the individual washing treatments to compensate for the variations. Seed for production of titanium dioxide sad process of msiring. 3Lce J. Mays*. 17. S. 2,460,369, Sept. 6.1949 ( Dec. 30.1943).-- 1. In a process of making a rutile inducing seed for use in hy* drolysis of hydrolyxable titanium salt solutions, heatingat a tem perature of 70*C. to boiling a dispersion containing a stabiliser which, on calcination, volatilizes before the temperature reaches 950*C. and has polyvalent anions and a member of the class con sisting of the monobasic-acid salts of the metals of the fourth group and the orthohydrates of the metals of the fourth group peptized with a monobasic acid, Che monobasic acid referred to in the '*'' being l to 2.2 moles per mote of the metal of the fourth group and the amount of stabilizer being 4 to 55 millimoles per mole of the metal of the fourth group, the heating being carried out until* curing is effected and then rapidly cooling below 60 *C. SiTf-uapregnsted alumina catalyst and process of preparing. Alls* D. Gassisos (Texaco Development Corp.). 17. S. 2,463,* 130, Sept. 27. 1949 (May 13, 1944; Jan. 23. 1947).--!. The method of activating an alumina catalyst consists in subjecting the catalyst to contact with anhydrous SiF at a temperature in the range of 70* to 950 *F. until the aluminum oxide absorbs about 5 to 13^ by weight of SiF*. S7-(apregxiated ifltrs Inniina catalyst. Allxn t> . on (Texaco Development Corp.). IT. S. 2,443,131 <L-- 1949 (Jan. 23.194<; Dec. 31,19481.^1. A catalyst ctTecs converting hydrocarbons at elevated temperature* 1 B essentially of silica-alumina complex containing at lean ? weight anhydrous SiF*. absorbed at a temperature within ' ' of about 70* to l)50*F. __ Saicsto-dtanste phosphors. Fcxdinano a. Ktur.s _ ford National Bank and Trust Co.'1. 17. S. 2,473.900 Gu lina (Jan. 14. 1946; in Netherlands Nov. 1*5. liuJl.-- ; crystalline luminescent material consists of titanium activ ^ silicates in the form of silicate-titaaates and of the tired re-.-, product of silicon dioxide, titanium dioxide, and an oxi :r - metal of the group consisting of calcium, strontium, cadin:- sodhtm, and lithium, the constituent oxides of the *ili-' _ titanates being in the mole ratios of x:(y 4* z) between abou* and 1:5 and s:y between about 1.5:1 and l:IU0. wherein xr seats the metal oxide component, y represents the silicon dio component, and s represents the titanium dioxide component. Additional abstracts __ Sect V: Comparative effect of various stabilizing treatnum on rile extrsetsbility of fresh glass surfaces. Damping of lummr cence of glasses and uranyl salts. Effect of hydrostatic prc$?ur on plasticity sad strength. Flow of glass. Fundamental stud:< fl on the chemical resistance of optical glass. Glass structure *r. glass properties. Infrared study of the structure of glasses pr pared by melting crystals. Sect VII: Transition of i-alumina 1 heating. Sect, vm: Studies on the crystallization properties __ fused silicates. Sect. Z: Rheology of stiff pastes. Sect XI* Gypsum day and its thermal dissociation. X-ray studies in fire-day and shale deposits. XIV--General and Historical Government doses ease in flat glass antitrust suit court re ment Printing Office, Washington, 1949. 203 pp.--The report cesses until November. Anon*. Class lad., 29 [6| 325-27 __ deals primarily with the medical and biological applications of (1943).--A summary is given of the eourt proceedings of the suit nuclear energy: researcb into the effects of radiation on living filed by the Antitrust Division of the Department of Justice things, the protective measures established for the use of radio against 8 manufacturers of fiat glass products and others. active materials, and the expanding use of radioisotopes in W.W.C. f medical diagnosis and treatment, and in cancer research. The re How to establish reduction to practice of a chemical invention. port also covers the highlights of other Commission activities Rocea T. McLean*. Chen. Ms., 65 [6! 332-84 (1949). during the last 6 months. E.D.M. Symposium on Usefulness and Limitations of Samples: latr^ New horizons in ceramics. Kosaet M. Khans*. Ohio State _ daction. H. F. Dodge. Sampling and its Uncertainties. S. 5 Cnee. Eat. Expt. Sla. .Yew*. 21 31 39-42, 1U-14 (1949).--New Wilks. Variations in Materials, Testing, and Sample Sixes. developments are given in the fields of (1) raw materials, (2) Lxsuz E. Simon (cf. Ceram. Abstracts, 1949, March, p. 94/.. purification. (3) synthesis (quartz, greenockite (CdS), crocoite Amount of Inspection as a Function of Control of Quality. G. R. (PbCrO). rutile, ete.). (4) abrasives, (5) vitreous enamels, (6) g Cause. Published by the American Society for Testing Ma glass, (7) structural day products. (8) whiteware (tile and elec terials, Philadelphia 3,1948. 39 pp. Price 81.00.--The authors trical porcelain). (9) refractories, and (10) bonding agents. consider the amount of testing necessary for the acceptance of W.D.F. good material and the /ejection of poor material. They also dis New micro methods ease storage and finding of /sets. Anon. __ cuss the general principles governing the-degree to which the Gum. lads., 65 [5 ] 717,833 (1949).--A brief discussion of the ad amount of testing of consistently good material can be reduced vantages of microfilm, microcards, microcombinations of the compared with that required when the quality is erratic. two. and micro- and mini-prints. E.D.M. Organization and function of an analytical and tasting group, k PATENTS R. p. Chatszan. Oum. lads., 65 [51713-21 (1949).--A detailed Investment materiaL T. E. Moons and C. H. Watts (Ran description of the semicentialized analytical and testing group of som fie Randolph Co.). U. S. 2,479,504, Aug. 16, 1949 (July 12. the American Cyanamid Co. It operates independently of but 1943).--Soluble add phosphate salts will react with silica at cooperate* with other divisions in the research laboratory. C. de- -- elevated temperatures (14G0*F.) forming a refractory bond suit scribes its functions, the types of reports used. etc. E.D.M. able for investments. Ammonium, magnesium, calcium, and Review of pnenmocoaiosis and dust suppression in mines: sodium add phosphates may be used, added as 5 to 10?e of the I, Medical aspects of pneumoconiosis. A.G. Heppleston. Trams, total. D.F.K. lust. Jfifttag *grr. (London), 108 [10] 456-34 (1949); Bull. . i Making insulating and acoustical materials. John M. Cant* lust. Miaiag Met., No. 511, pp. 9-19 (1949).--H. discusses the sell (J. M. Campbell and P. J. Haber). U. S. 2,481491, Spt- present state of medical knowledge. 73 references. W.B. 6,1949 (May 15,1945).--A process for the manufacture of insulat ing material having a specific gravity under l and resistance t BOOK __ crumbling at 2270*F. from expanded vermiculite comprises (1/ Handbook of Patents. Hajuly A. Tooucin, Je. D. Van Nos spraying the expanded vermiculite wiQt powdered magnesium of trand Co., New York. 1949. 800 pp. Price 89.00. Reviewed in aluminum oxide. (2)-adding a gel composed of sodium silicate, Chen, lads., 65 [51 798. 800 (1949).--This worth-while analysis magnesium fluosilicate, urea, and water, (3) adding plastic clay, of patent law and "patent considerations" is intended for the pro- j and (4) extruding the mass. D.F.K. feasionaily trained client rather than the lawyer or solicitor. E.D.M. Additional abstracts Sixth Semiannual Report of the Atomic Energy Commission. Sect. ZZ: Htspano-Moresque ware. Italian majolica. Sect Prepared by the L\ S. Atomic Energy Commission. U. S. Govern VII: (.patent) [Design for an all] ceramic space heater. The American Ceramic Society February 15,1993 I hereby certify that the attached copies of Ceramic Abstracts, Volume, 1950, are true and accurate copies, which are maintained in the normal course of business at the American Ceramic Society, 735 Ceramic Place, Westerville, Ohio 43081. Product Manager Ceramic Information Center 735 Ceramic Place Westerville, Ohio 43081-8720 614 * 890*4700 TWX: 7101109409 *