Architektonische Monatshefte : Neubauten u. Conkurrenzen: Architektonische Monatshefte, VII. Band

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Persistenter Identifier:: 1550495565775

Titel:: Architektonische Monatshefte : Neubauten u. Conkurrenzen

Erscheinungsort:: Stuttgart

Erscheinungsverlauf:: 19XX

Signatur:: verschiedene Signaturen

Strukturtyp:: Zeitschrift

Sammlung:: Zeitschriften

Lizenz:: https://creativecommons.org/licenses/by-sa/4.0/

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Persistenter Identifier:: 1550495565775_1901

Titel:: Architektonische Monatshefte, VII. Band

Jahrgang/Band:: 1901

Erscheinungsort:: Leipzig

Erscheinungsjahr:: 1901

Sprache:: deutsch

Strukturtyp:: Band

Standort:: Universitätsbibliothek Stuttgart

Signatur:: XIX/94.2-7,1901

Lizenz:: https://creativecommons.org/publicdomain/mark/1.0/deed.de

Sammlung:: Zeitschriften

Illustration

Titel:: Tafel 69-70: Concurrenz-Project für die Ausstellung für Moderne Decorative Kunst in Turin 1902

Künstler/Illustrator:: Aronco, Raimondo d'

Strukturtyp:: Illustration

caput, News.) Phosphorus in Cleveland Ironstone and in Iron. 17 July 12, 1878. oo BN 25 per cent is present, the compound is infusible at that I that is, we have the equivalents in the ratio of 1°57 iron to temperature. 0-385 phosphorus, or— All the phosphides of iron are exceedingly brittle. 1°57 Those containing the largest proportion of phosphorus are 385 4 the most so. The combination of 75 of iron with 25 of phosphorus is capable of being ground up like sandstone in an agate mortar to an extremely fine powder, The Compounds in which Phosphorus Exists in Cleveland Metal. When Cleveland pig-iron is melting in a puddling furnace, there appear to be, near the complete fusion point of the iron, certain parts of the metal more fusible than others. If a partially fused pig be broken, the fra@ured surface presents throughout glistening, ap. parently fluid portions, thoroughly interspersed with particles of metal which have not become fluid. Judging from the comparative fusibility of phosphice of iron, it was thought that, if separate compounds of iron and phosphorus existed in pig metal, these compounds would be more fusible than the bulk, In order to ascertain if such is the case, about 1 cwt, of Cleveland iron was poured into a mould. After it had become viscous extreme pressure was applied by means of a hydraulic ram, and the portions of metal last fluid expressed. The analyses given below indicate with what result, viz, :— Metal used. Metal expressed. ~ne-cent ., Qo0'I22 per cent 1750 ne. 0°288 ”» 0'790 » o*06o : 6-840 0150 100000 equivalents iron to 1 of phosphorus, and therefore may be written Fe,P, About six months after the above experiment was made, it was repeated, and, as will be secen by what follows, with almost the same result. The expressed metal in this case contains by calcula. tion 50 ‘per cent of unaltered iron, and 50 per cent of phosphide, the composition of each being as stated below, viz. :— Unaltered Metal, Plosphide of Iron. Iron.. .. 46°18 per cent ..43°53 per cent Carbon .. 142 .. 0°58 J Manganese o'14 be 0°10, 0°68 per cent Silicon .. 1°50 Sulphur .. 0°03 Phosphorus 0°73 3 50°00 _ Calculated into 100 parts this phosphide would contain viz. t— "ro The metal expressed may be considered to be a combi. nation of phosphide of iron and unaltered pig metal. Assuming that the silicon in the expressed portion represents the proportion of unaltered metal, we have-- 100 X 0°79 ” 163 =49°5 of such metal, and 100-48'5=51'5 of phosphide. By calculation we find the composition of each of these parts to be as follows, viz.:— Unaltered Metal, +€'167 per cer * Iron .. .. .. 8826 percent Pnosphorus .. 1174 100°00 This also may be considered as Fe, P. It is very clear from these results that phosphide of iron does exist in a separate state in pig metal intimately diffused throughout the mass. . We now turn your attention to a different method of investigation. All who have immersed bar iron in dilute acids, such as hydrochloric or sulphuric acids, must have noticed a black residue adhering to the outside of the iron. It is this substance which must now occupy our attention. Metal, which had been deoxidised and desiliconised containing 1-6 per cent of phosphorus, was treated in fine powder to the action of hot dilute sulphuric acid. After all that was capable of being dissolved had passed into solution, a dense black residue remained, insoluble in sulphuric acid. This residue was filtered off, washed, dried, and weighed. The weight was a little over 2 per cent of metal used. On analysis it was found to consist of phosphide of iron together with a minute quantity of silica, carbonaceous matter, and titanic acid. The iron and - phosphorus were present in the proportions of 3 equivalents of iron to 4 equivalents of phosphorus, and therefore may be expressed as Fe;Py. A second experiment gave the same result. ‘Two samples of puddle bar, treated in th.e same manner, also left a residue of phosphide of the above-mentioned composition. I have also found phosphides in residues from other samples as Fe3P,. The proportion of phosphorus left in the insoluble phosphide varies very considerably, differing widely in different samples of iron, in some being as much as one- third, and in others only one-tenth of the total amount. These fa&s I think clearly prove that there exist two or more different phosphides in iron containing phosphorus, Phosphide of Iron. 44°Q55 per ceut 0'295 yp 0.16 [ron .. . Carbon ws Manganese... Silicon.. .. Sulphur ., Phosphorus Titanium .. TREN, 48-500 51°500 Not taking into consideration the very small proportion of the elements other than phosphorus and iron present, which together amount to only 0°447 part, we have iron and phosphorus in the following proportion expressed in per cents. viz: Iron .. .. .. 8805 percent Phosphorus «11°05 ”" 100'00 Calculated into chemical equivalents by dividing eact by their respeive atomic weight, we have— 88-05 g° 6 57 Ana-— 11°95 | 5 =0 385,

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fullscreen: Chemical news and Journal of physical science (Volume 38, 1878 (July - December))

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