Barium Lead Oxide

Synthesis of BaPb03 via the oxalate route reported by Gan etal. [324] is an example of the general method discussed by them. In this procedure, the microemulsion systems consisted of NP-5/octane/aqueous phases, and the latter contained dissolved (i) Ba(N03)2 + Pb(N03)2 or (ii) oxalic acid. Mixing of the two microemulsions yielded a Ba,Pb-oxalate of average particle size 8 nm. A phase-pure BaPb03, composed of micron-sized agglomerates, was obtained at a calcination temperature of 650 C. 

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Ba03Pbo 75860 25. Antimony barium lead oxide (Sbo25BaPbo.7503). [123010-39-9], 30 200... 

Paste Mixing. The active materials for both positive and negative plates are made from the identical base materials. Lead oxide, fibers, water, and a dilute solution of sulfuric acid are combined in an agitated batch mixer or reactor to form a pastelike mixture of lead sulfates, the normal, tribasic, and tetrabasic sulfates, plus PbO, water, and free lead. The positive and negative pastes differ only in additives to the base mixture. Organic expanders, barium sulfate [7727-43-7] BaSO carbon, and occasionally mineral oil are added to the negative paste. Red lead [1314-41 -6] or minium, Pb O, is sometimes added to the positive mix. The paste for both electrodes is characterized by cube weight or density, penetration, and raw plate density. 

A number of process improvements have been described, and iaclude the use of white mineral oil having a boiling range of 300—400°C (60) or the use of a mixture of cresols (61). These materials act to reduce the reaction mixture s viscosity, thus improving mixing. Higher sebacic acid yields are claimed by the use of catalysts such as barium salts (62), cadmium salts (63), lead oxide, and salts (64). 

The common acid acceptors, red lead oxide and barium carbonate, are both toxic when inhaled or ingested. They are, and should be, used in industry as dispersions in EPDM and ECO. SuppHers of red lead oxide include Polymeries, Inc., Rhein Chemie Corp., and Akrochem Co., Akron, Ohio. Barium carbonate in an ECO binder is available from Rhein Chemie Corp. and Synthetic Products Co. 

Since discovering and making use of the piezoelectric effect in naturally occurring crystals such as quartz and Rochelle salts, scientists have produced a wide range of piezoelectric materials in the laboratoi y. An early example is barium titanate, used in an electrical component called a capacitor. Currently, most piezoelectric materials are oxide materials based on lead oxide, zirconate oxide, and titanium. These very hard piezoelectric materials are termed piezoceramics. 

The violent interaction with sulfur trioxide causes incandescence with barium oxide [1] and lead oxide [2],... 

Intimate mixtures of chlorinated rubber and zinc oxide or powdered zinc, with or without hydrocarbon or chlorinated solvents, react violently or explosively when heated at about 216°C. If in milling such mixtures local overheating occurs, a risk of a violent reaction exists. Such risks can be minimised by controlling milling temperatures, by cooling, or by using a mixture of maximum possible fluidity [1], Similar reactions have been observed with antimony or lead oxides, or aluminium, barium or zinc hydroxides [2], The full report [3] has been abstracted [4],... 

Ammonium nitrate Ammonium perchlorate Barium chlorate (hydrate) Barium chromate Barium nitrate Barium peroxide Iron oxide Iron oxide Lead chromate Lead oxide (red lead) Lead peroxide Potassium chlorate Potassium nitrate Potassium perchlorate Sodium nitrate Strontium nitrate... 

Sleight, A.W., Superconductive Barium-Lead-Bismuth Oxides. US Patent 3,932,315 (1976). 

Compds containing waxy materials have been used in the role of simulating, principally density, in expl systems. Ammo containing the inert load are used for training purposes and engineering tests. In the early 1930 s inert fillers used were lead oxide/paraffin, barium carbonate/ paraffin and barium carbonate/paraffin/lead oxide. The specific desired density was obtained by varying the proportions of the constituents... 

The residue of the calcination is treated with hydrochloric acid, the solution and any insoluble residue remaining being then analysed by the ordinary methods. Tests are made especially for alumina, zinc oxide, tin oxide, lead oxide, barium sulphate and calcium carbonate, and also for oxides of chromium, iron, copper and antimony, silicates and gypsum. 

B. C. Dutt and S. N. Sen found that when nitric oxide is passed into a suspension of barium dioxide in water, barium nitrite, not nitrate, is formed. P. Sabatier and J. B. Senderens observed no change when nitric oxide is passed over Cuprous Oxide at 500°. H. A. Auden and G. J. Fowler observed that dry nitric oxide and Silver oxide, at ordinary temp., form silver and silver nitrate P. Sabatier and J. B. Senderens also obtained silver and silver nitrite by passing nitric oxide into water with silver oxide in suspension. C. F. Schonbein found gold oxide is reduced by moist nitric oxide, forming nitrous acid. P. Sabatier and J. B. Senderens found that titanium sesquioxide forms white titanic oxide when heated in an atm. of nitric oxide and that stannous oxide below 500° burns in an atm. of nitric oxide, forming stannic oxide. If nitric oxide be passed into water with lead dioxide in suspension, the water is coloured, and in about 3 hrs., lead nitrite and nitrate are formed, and later, rhombic crystals of a basic nitrite. B. C. Dutt and S. N. Sen said that the nitrate is formed by the action of the dioxide on the nitrite. Lead dioxide is reduced to lead oxide by nitric oxide at 315°, and H. A. Auden and G. J. Fowler found that the reaction begins at 15°, when a basic lead nitrite is... 

The barium, lead and potassium salts (on the 4-position) are sensitive detonators. See Other ARENEDIAZONIUM OXIDES, POLYNITROARYL COMPOUNDS... 

Inorganic pigments are found in the earth. Iron and lead oxides provide earth colors. Copper calcium silicate and cobalt stannate provide blues. The colors burnt sienna and burnt umber come from iron oxides. Green pigments come from chromic oxide, calcinated cobalt, and zinc and aluminum oxides. Red pigments come from cadmium sulfide, cadmium selenide, and barium sulfate. All these chemical compounds come from the earth. 

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