1、MIL-C-324C b = 7779706 OLL3762 b MIL-C-324C 30 Aupust 1983 SUPERSEDING. MIL-C-324 B 20 August 1976 MILITARY SPECIFICATION CALCIUM SILICIDE, TECHNICAL This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers two
2、 types of technical grade calcium silicide (CaSi2). 1.2 Classification. specified (see 6.2): . Calcium silicide shall be of the following types as Type 1 5Pe 11 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications, standards, and handbooks. Unless otherwise specified, the following
3、 specifications, standards, and handbooks of the issue listed in that issue of the Department of Defense Index of Specifications and Standards (DoDISS) specified in the solicitation form a part of this specification to the extent specified herein. SPECIFICATIONS FEDERAL NN-P-71 - Pallets, Material H
4、andling, Wood, Stringer Construction, PPP-P-704 - Pails, Metal: (Shipping, Steel, 1 Through 12 Gallons) 2-Way and 4-Way (Partial) : Beneficial comments (recommendations, additions, deletions) and any perti- : : nent data which may be of use in improving this document should be addressed: : to: Comma
5、nder, Armament Research and Development Center, US Army Armament, : : Munitions and Chemical Command, ATTN: : Ground, MD 21010 by using the self-addressed Standardization Document : Improvement Proposal (DD Form 1426) appearing at the end of this document : : or bv letter. DRSMC-TSC-S(A), Aberdeen P
6、roving FSC 6810 r Licensed by Information Handling ServicesProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-c-3 24E STANDARDS MILITARY MIL-STD-105 - Sampling Procedures and Tables fur Inspethsfi by Attribiites MIL-STD-129 - Marking for Shipment an
7、d Stahge MIL-STD-147 - Palletize Unit Loads MIL-STD-1168 - Ammunition Lot Numbering 2.1.2 Other Government docurnetits, drawings, ana pubUcatTorls_c The following other Government documents, drawings, and publicabldns form W -. L. Percent calcium = where: A = Normality of potassium permanganate solu
8、tion, B = Milliliters of potassium permanganate solution used to titrate the C = Milliliters of potassium permanganate solutian used to titrate the W = Weight of specimen in 4.2.4.2, in grams. specimen, blank, and Percent total silicon, calcium, and iron = A f B +C 7 where: A = Percent silicon calcu
9、lated in 4.2.4.2, B = Percent total iron calculated in 4.2.4.3, and C = Percent calcium calculated in 4.2.4.4. 4.2.4.6 Metallic iron. Transfer approximately 2 g of the specimen, weighed to the nearest milligram, into a 250-mL Erlenmeyer flask and add 3 g of mercu- ric chloride. Displace the air from
10、 the flask with a continuous flow of carbon dioxide and add 100 mL of boiling water. Transfer to a steam bath for 10 min- utes and agitate frequently while continuing the flow of carbon dioxide. Cool, discontinue the flow of carbon dioxide, filter, and wach the residue with hot water, catching the f
11、iltrate in a beaker containing 25 mL of Zimmerman- Reinhardt reagent prepared as specified in 4.2.4.3(c) and 350 mL of water. Titrate immediately with 0.1N potassium permanganate from a microburet Run a blank. Calculate the percent by weight metallic iron as follows: 5.585 A(B - C Percent metallic i
12、ron = w. 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-324C b8 m 777770b 0333770 5 m - MIL-C-324C where: A = Normality of the potassium permanganate solution, B = Milliliters of potassium permanganate solution used to titrate the specimen ,
13、 C = Milliliters of potassium permanganate solution used to titrate the blank, and W = Weight of specimen, in grams. 4-2.4-7 Alkalinity- Weigh to the nearest milligram, approximately 2.5 g of the specimen and transfer to a 400-mL beaker. nitrate in 200 mL of water, add this solution to the specimen,
14、 and allow to stand for 2 hours at 2OoC with intermittent stirring. through a Buchner funnel, wash the residue with a small quantity of water, and transfer the filtrate to a 250-mL volumetric flask. Dilute to the mark with water and mix well. Remove a 100-mL aliquot, add 2 to 3 drops of methyl orang
15、e indicator, and titrate with 0.1N hydrochloric acid to a pink end point. blank. Dissolve 0.5 g of ammonium Filter the mixture Run a Calculate the percent by weight alkalinity as follows: 7.01 A(B -C) W Percent alkalinity (as Cao) = where: A = Normality of the hydrochloric acid, B = Milliliters of h
16、ydrochloric acid used to titrate the specimen, C = Milliliters of hydrochloric acid used to titrate the blank, and W = Weight of specimen in grams. 4.2.4.8 Free carbon. Transfer approximately 0.5 g of the specimen, weighed to the nearest 0.1 mg, to a combustion boat. tion tube and displace the air w
17、ith a rapid stream of chlorine that has been dried by bubbling through concentrated sulfuric acid. until the material ignites and continue heating until the material ceases to glow. Allow the tube to cool and withdraw the boat. Transfer the boat to a beaker and extract the residue with 1 to 1 hydroc
18、hloric acid to dissolve the iron and pounds. cible and wash well with water. Dry the crucible for 3 hours at 100 to 105OC, cool in a desiccator, and weigh to the nearest 0.1 mg. low red heat, cool in a desiccator, and reweigh. Calculate the percent by weight free carbon as follows: Introduce the boa
19、t into a combus- Heat the furnace gently Filter the solution through a weighed filter cru- Ignite the crucible at 100A - W Percent free carbon = where: A = Loss in weight during the second ignition, in grams, and W = Weight of specimen in grams. 4.2.4.9 Carbides and phosphides- (a) Packed absorption
20、 tube. Impregnate absorbent cotton with lead Pack an absorption tube successively with the impreg- acetate solution, and impregnate asbestos with potassium bisulfate solution, and dry both materials. nated cotton and asbestos. 9 Provided by IHSNot for ResaleNo reproduction or networking permitted wi
21、thout license from IHS-,-,-MIL-C-324C 68 777770b OLL3771 7 . (b) Procedure- Dry a 300-mL kf$catim, Type of caJxium ck:Eicicl require (sete Lz), Iicide require8 far level A and level. C unft packs (see 561+.L and 5.1-2). 6.3 - Ratch. A batch is definedas that quanttg af material which has been- manuf
22、actured by some unit chemical pracess 01: sttb3ecteci to SOM physical mixing operation intended to make the inal product substantially mIfaEai, 6 *4 SigniSicant places Foi: the purposed of determining eonf armance with this specification, an observed or calcdated value should be rounded of “to the n
23、earest unit“ in the last right-hand place o i.&ures used in. expressing the Limiting value, in accordance with the raunding-al methoci of ACTM. E29* 6.5 Sampling and testing precautions. This specification covers inspection and use of chemical material which is potentially hazaxdoua to personnel. Ca
24、l- cium silicide is dangerous when wet. Hydrofluoric acid, asbestos, and chlorine should be handled with utmost cstation, fi1 applicsble. safeizy puxes, regula- tions, and procedures must, be fallowed in the handling and processing of this material. 6.6 Regulatory coverages The packaging requirement
25、s specified herein are based on regulations current at the time of specification preparation. Because regulations may be changed, ie is recommended thae the applicable regulations be reviewed at the time af calcium silicide packaging. Custodians: Army - EA Navy - OS Review activities: Army - MD, AR DLA - GS User activity: Navy - MC I2 Eke par Lng act ivi t.y : Amy- EA Project No., 68LO-B393 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
