Potassium nitrate

About: Potassium nitrate is a research topic. Over the lifetime, 3537 publications have been published within this topic receiving 29450 citations. The topic is also known as: Nitric acid, potassium salt & Saltpeter.

Anodic corrosion inhibitors against chloride induced corrosion of concrete rebars

Abstract: The effect of anodic inhibitors [calcium nitrate Ca(NO3)2, calcium nitrite Ca(NO2)2 and potassium nitrate NaNO2] has been evaluated using cylinders with steel rebars exposed to the following environments: in the marine tidal zone, at roof top and in air of 38°C and 90% relative humidity for 4 years. The experiments showed that the half cell potentials were more negative than the visual inspections proved when anodic inhibitors are used. Inhibitor dosage on 3–4% of cement weight seems sufficient to protect the rebar against corrosion. Capillary absorption experiments showed that the concrete porosity was unaffected by the inhibitors. The concentration profiles of chloride, nitrite and nitrate were investigated with respect to leaching. However, it was difficult to find the background level of nitrite due to possible chemical alteration.

Reduction of Potassium (K) Content in Strawberry Fruits through KNO3 Management of Hydroponics

Abstract: 1Department of Agriculture, Faculty of Life and Environmental Science, Shimane University, Matsue 690-1102, Japan 2United Graduate School of Agricultural Sciences, Tottori University, Tottori 680-8553, Japan 3Faculty of Agriculture, Sylhet Agricultural University, Sylhet-3100, Bangladesh 4Olericulture Division, Horticulture Research Center, Bangladesh Agricultural Research Institute, Gazipur-1701, Bangladesh 5Faculty of Home Economics, Otsuma Women’s University, Chiyoda-ku, Tokyo 102-8357, Japan 6Faculty of Medicine, Shimane University, Izumo 693-8501, Japan 7Faculty of Agriculture, Tokyo University of Agriculture and Technology, Fuchu 183-8509, Japan

Precipitation incidence of the lanthanoid(III) hydroxides

Abstract: The precipitation pH values of fourteen lanthanoid (III) hydroxides were determined. The hydroxide ion was supplied electrolytically in aqueous solutions of potassium nitrate, and the formation of the insoluble hydroxide was detected through the optical scattering method. The precipitation pH values ranged from 7.47 to 5.74 between lanthanum and lutetium. Discussions are made in connection with some inherent values of the lanthanoid metal ions.

Phase Modification of Ammonium Nitrate by Potassium Salts

Abstract: Modification of the room temperature phase (IV-III) of ammonium nitrate (AN) has been attempted using a variety of potassium salts namely, KF, KCl, KI, KNO3, K2CO3, K2SO4, KSCN and K2Cr2O7. No phase transition was observed when AN containing 1-2% by mass of these potassium salts is heated from room temperature (25 degrees C) onwards in DTA and DSC scans, but the linear expansion due to phase transition was still observable in TMA measurements. Complete arrest of the linear expansion occurs only when a higher concentration of the additive is used. Similarly, in thermal cycling experiments, complete phase modification in the temperature range -80 to 100 degrees C occurs only with a higher percentage of the potassium salt. The extent of modification, however, is found to be dependent both on the concentration, and the type of the anion. Potassium dichromate when used as an additive modifies the phase as well as the decomposition pattern of AN.

Near infrared illuminating composition

Abstract: AN ILLUMINATING COMPOSITION WHICH, UPON BURNING, PRODUCES INFRARED RADIATION IN THE 0.74-1.2 MICRON REGION OF THE SPECTRUM. THE PRODUCED RADIATION CAN BE UTILIZED TO PRODUCE IRRADIATION UPON A TARGET TO IMPROVE THE RANGE AND RESOLUTION OF A NIGHT VIEWING DEVICE. THE COMPOSITION IS COMPRISED OF SILICON, HEXAMETHYLENETETRAMINE, AN EPOXY BINDER, AND AN ALKALI METAL NITRATE SELECTED FROM THE GROUP CONSISTING OF POTASSIUM NITRATE, CESIUM NITRATE AND RUBIDIUM NITRATE.