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Diagramme de phases LiNO3-KNO3
Comptes Rendus de l'Académie des Sciences - Series IIC - Chemistry, 1998The phase diagram of the binary system (Li, K)NO3 has been obtained by direct and differential thermal analysis techniques between 323 and 630 K. This system is characterized by a eutectic point (58 % mol KNO3, 407 ± 1 K) and a peritectic reaction at 412 ± 1 K. A plateau due to the solid-solid transition of KNO3 is observed at 403 ± 1 K.
Mohamed Guizani +2 more
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Polarization Reversal in Ferroelectric KNO3
Journal of Applied Physics, 1967Ferroelectric potassium nitrate has been found, by a pulse-testing technique, to show a threshold electric field, essentially invariant with duration, below which KNO3 behaves as a completely elastic dielectric. Test results on several ferroelectric materials, all single crystals, are shown and compared to the results obtained from fused layers of KNO3.
Norman W. Schubring +2 more
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The phase diagram of LiNO3–KNO3
Thermochimica Acta, 2002Abstract The binary phase diagram of LiNO 3 –KNO 3 are studied by means of differential scanning calorimeter (DSC). The convincing evidence for the identification of new phase has been presented. The phase diagram indicates an intermediate compound KLi(NO 3 ) 2 , which melts congruently at 428 K.
Xuejun Zhang, Kangcheng Xu, Yici Gao
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Russian Journal of Physical Chemistry A, 2018
The processes of molecular relaxation in binary crystalline systems KNO3–KClO4, KNO3–KNO2, and K2CO3–K2SO4 are studied via differential thermal analysis and Raman spectroscopy. It is found that the relaxation time of the vibrations ν1(A) of anions NO-3 and CO2-3 in systems KNO3–KClO4, KNO3–KNO2, and K2CO3–K2SO4 is less than that in KNO3 and K2CO3 ...
A. R. Aliev +6 more
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The processes of molecular relaxation in binary crystalline systems KNO3–KClO4, KNO3–KNO2, and K2CO3–K2SO4 are studied via differential thermal analysis and Raman spectroscopy. It is found that the relaxation time of the vibrations ν1(A) of anions NO-3 and CO2-3 in systems KNO3–KClO4, KNO3–KNO2, and K2CO3–K2SO4 is less than that in KNO3 and K2CO3 ...
A. R. Aliev +6 more
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Structure of high-pressure KNO3-IV
Physica B+C, 1986Potassium nitrate has seven polymorphs in the pressure range to 40 kbar. The structures of the three phases obtainable at atmospheric pressure are known. Attempts to solve the structure of high pressure KNO3 phase IV by X-ray diffraction have been unsuccessful. We have now solved this structure using time-of-flight neutron powder diffraction data taken
T.G. Worlton +3 more
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Thermodynamic Properties of NaNO3-KNO3 Melts
Russian Journal of General Chemistry, 2019Thermodynamic properties of NaNO3-KNO3 melts have been studied by high-temperature mass spectrometry. The activities of the components of the condensed phase have been determined and the changes in the chemical potentials and Gibbs energies of the binary system have been calculated.
G. P. Dukhanin, S. I. Lopatin
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Metastable KNO3 III from solution
Journal of Crystal Growth, 1972Abstract The matastable rhombohedral polymorph of potassium nitrate which can be grown from solution in water or alcohol is phase III, not phase I. The small crystals can be cycled through the ferroelectric ⇌ paraelectric transformation III ⇌ I.
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Thermobarometric study of KNO3 phase transitions
Thermochimica Acta, 1997Abstract In this work, a thermobarometric study of bulk KNO3 submitted to pressure less than 150 MPa has been performed by means of the Metabolemeter system. The effect of pressure on the transitions between the different phases I, II and III have been analysed. Endothermic transformation from II to I takes place through phase III.
Joan Font, Joaquim Muntasell
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The phase diagram of NaNO3—KNO3
Thermochimica Acta, 1980The binary phase diagram of NaNO3 and KNO3 was studied using differential scanning calorimetry (DSC). The data more precisely defined the solidus and liquidus of an earlier phase diagram for this system. This phase diagram was modelled using regular solution theory.
C.M. Kramer, C.J. Wilson
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