CN103259028A - Molten nitrate salt and application thereof - Google Patents
Molten nitrate salt and application thereof Download PDFInfo
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- CN103259028A CN103259028A CN 201310138699 CN201310138699A CN103259028A CN 103259028 A CN103259028 A CN 103259028A CN 201310138699 CN201310138699 CN 201310138699 CN 201310138699 A CN201310138699 A CN 201310138699A CN 103259028 A CN103259028 A CN 103259028A
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Abstract
The invention discloses a molten nitrate salt and an application thereof. The molten nitrate salt is characterized in that the molten nitrate salt comprises the following components by mass percent: 0-65 percent of LiNO3, 30-95 percent of KNO3 and 0-60 percent of Ca (NO3)2. The molten point of the molten nitrate salt provided by the invention is lower than 150 DEG C (the minimum is 109.4 DEG C), and the thermal stable temperature is higher than 500 DEG C (the maximum reaches 638 DEG C). The molten nitrate salt not only can be used as the electrolyte material of high-energy batteries, but also can be used as the dielectric material for heat transfer, and has unique performance and is superior to the existing materials.
Description
Technical field
The present invention relates to class nitric acid congruent melting salt and a purposes, mainly towards the application in high energy electrolyte for batteries material such as thermal cell, High Temperature Lithium Cell, lithium ion battery and heat transfer medium material technology field.
Background technology
Fused salt is mainly used in thermal cell electrolyte and heat-conduction medium material field at present.
Thermal cell claims thermally activated battery again, it be with fuse salt as electrolyte, make battery temperature reach the predetermined work temperature and the former storage battery of working with internal heat resource.Adding hot reserve and long term storage is two big features of thermal cell.Thermal cell is very reliable, durable, if good seal, can reach 25 years or more of a specified duration storage life; Advantages such as thermal cell has the specific energy height in addition, specific power is big, discharge rate is fast, the environment for use temperature is wide.
In recent years, develop a kind of high temperature energy of oil, natural gas and the energy supply of geothermal exploration equipment that is used to and become more and more important.In oil, natural gas exploration field, the exploring equipment working temperature can be up to 200 ℃, and if depth of exploration deepen, working temperature can be higher; In the geothermal exploration field, the exploring equipment working temperature is at 200 ℃～400 ℃.We know that the battery operated temperature of commercialization is-55 ℃～70 ℃ at present, and the highest reaches 200 ℃; The battery of military field widespread usage is thermal cell, its working temperature up to 350 ℃～550 ℃; But for the high-temperature battery or the blank out that are operated between 200 ℃～350 ℃.Other field has demand widely as doughnut detection system, underground manometer etc. to high-temperature battery.A key technology of development high-temperature battery is exactly a kind of molten-salt electrolysis material that can work about 150 ℃～350 ℃ of exploitation.
During normal temperature, the molten-salt electrolysis material is non-conductive solid, can't use; In use, working temperature is higher than the molten salt electrolyte fusing point, and the solid electrolyte fusion forms ion conductor and the conduction of high conductivity, and battery just can be activated.So the direct target that will develop the molten-salt electrolysis material that can work about 150 ℃～350 ℃ is sought a kind of fusing point exactly and is lower than 150 ℃, thermal stable temperature is higher than 350 ℃ electrolyte.
In addition, in industrial production, unavoidable constantly generation heat or continuous the needs are supplied with heat, thereby need heat transfer medium.In existing heat transfer medium, water or its steam, organic oil are very common heat transfer mediums.But the serviceability temperature limit of aqueous water low (less than 100 ℃), and the thermal capacitance of steam is very little, is difficult to satisfy a large amount of requirements of conducting heat; Organic oil has low-down solidifying point (less than 0 ℃), and the resistance to extreme temperature of organic oil is 393 ℃, and the resistance to extreme temperature of heat transfer medium has limited the gross efficiency of Rankine circulation (Lang Ken circulation) in fact, and organic oil is used for too costliness of heat transfer medium.Under this background, fused salt is subjected to extensive concern as a kind of heat transfer medium.In order to improve resistance to extreme temperature, thereby improve Rankine circulation gross efficiency, the heat transfer medium material must possess the characteristics that fusing point is low, thermal stable temperature is high (being that the working temperature window is wide).
Main purpose of the present invention be the exploitation a kind of have can accept fusing point and the high fuse salt of thermal stable temperature, solve above-mentioned key technical problem.
Summary of the invention
Shortcoming and deficiency in order to overcome prior art the object of the present invention is to provide class nitric acid congruent melting salt and a purposes, not only can be used as the molten-salt electrolysis material of high-temperature battery, and can be used as the dielectric material that heat transmits.This nitric acid congruent melting salt not only has lower fusing point, and thermal stable temperature is higher.
A kind of nitric acid congruent melting salt, component and constituent mass percentage that described nitric acid congruent melting salt comprises are as follows:
LiNO
3，0～65%；
KNO
3，30～95%；
Ca(NO
3)
2，0～60%。
More preferably, the component and the constituent mass percentage that comprise of described nitric acid congruent melting salt is as follows:
LiNO
3，5～60%；
KNO
3，40～90%；
Ca(NO
3)
2，1～30%。
Described nitric acid congruent melting salt has following advantage and effect with respect to prior art:
(1) nitric acid congruent melting salt fusing point of the present invention is lower than 150 ℃ and (minimumly is lower than 110 ℃, be 109.4 ℃), thermal stable temperature is higher than 500 ℃ (the highest thermal weight loss starting point is 638 ℃), and operating temperature range is wide, good stability can normally be used in 150～500 ℃ of temperature ranges;
(2) nitric acid congruent melting salt of the present invention had both overcome the high shortcoming of binary nitric acid molten salt system fusing point, had solved the easy high-temperature oxydation of nitrate system and nitrite again and had decomposed the instability problem that brings;
(3) nitric acid congruent melting salt of the present invention not only can be as the molten-salt electrolysis material of high-energy battery, or can be used as the dielectric material that heat transmits: as the molten-salt electrolysis material of high-temperature battery, this nitric acid congruent melting salt can be used as can be at the molten-salt electrolysis material of 150 ℃～500 ℃ of work; It is low to have a fusing point as the heat transfer medium material, the advantage that thermal stable temperature is high, and namely the working temperature window is wide, can improve resistance to extreme temperature to the restriction of Rankine circulation gross efficiency.
Nitric acid congruent melting salt of the present invention, fusing point is between 109.4 ℃-150 ℃, and thermal stable temperature is higher than 500 ℃ (the highest thermal weight loss starting points for ℃), and operating temperature range is wide.As the material of above-mentioned two aspects, performance is better than current material.
Description of drawings
Fig. 1 is the DTA-TG curve chart of the nitric acid congruent melting salt of preparation among the embodiment 1;
Fig. 2 is the ionic conductivity of the nitric acid congruent melting salt of preparation among the embodiment 1 and the relation curve of temperature;
Fig. 3 is the DTA-TG curve chart of the nitric acid congruent melting salt of preparation among the embodiment 2;
Fig. 4 is the DTA-TG curve chart of the nitric acid congruent melting salt of preparation among the embodiment 3;
Fig. 5 is the DTA-TG curve chart of the nitric acid congruent melting salt of preparation among the embodiment 4;
Fig. 6 is the DTA-TG curve chart of the nitric acid congruent melting salt of preparation among the embodiment 5;
Fig. 7 is the DTA-TG curve chart of the nitric acid congruent melting salt of preparation among the embodiment 6;
Fig. 8 is the DTA-TG curve chart of the nitric acid congruent melting salt of preparation among the embodiment 7;
Fig. 9 is the DTA-TG curve chart of the nitric acid congruent melting salt of preparation among the embodiment 8;
Figure 10 is the DTA-TG curve chart of the nitric acid congruent melting salt of preparation among the embodiment 9;
Figure 11 is the DTA-TG curve chart of the nitric acid congruent melting salt of preparation among the embodiment 10.
Figure 12 is the DTA-TG curve chart of the nitric acid congruent melting salt of preparation among the embodiment 11;
Figure 13 is the DTA-TG curve chart of the nitric acid congruent melting salt of preparation among the embodiment 12;
Figure 14 is the DTA-TG curve chart of the nitric acid congruent melting salt of preparation among the embodiment 13;
Figure 15 is the DTA-TG curve chart of the nitric acid congruent melting salt of preparation among the embodiment 14;
Figure 16 is the DTA-TG curve chart of the nitric acid congruent melting salt of preparation among the embodiment 15;
Figure 17 is the DTA-TG curve chart of the nitric acid congruent melting salt of preparation among the embodiment 16;
Figure 18 is the DTA-TG curve chart of the nitric acid congruent melting salt of preparation among the embodiment 17;
Figure 19 is the DTA-TG curve chart of the nitric acid congruent melting salt of preparation among the embodiment 18;
Figure 20 is the DTA-TG curve chart of the nitric acid congruent melting salt of preparation among the embodiment 19;
Figure 21 is the DTA-TG curve chart of the nitric acid congruent melting salt of preparation among the embodiment 20;
Figure 22 is the DTA-TG curve chart of the nitric acid congruent melting salt of preparation among the embodiment 21;
Figure 23 is the DTA-TG curve chart of the nitric acid congruent melting salt of preparation among the embodiment 22;
Figure 24 is the DTA-TG curve chart of the nitric acid congruent melting salt of preparation among the embodiment 23;
Figure 25 is the DTA-TG curve chart of the nitric acid congruent melting salt of preparation among the embodiment 24.
Embodiment
A kind of nitric acid congruent melting salt, component and constituent mass percentage that described nitric acid congruent melting salt comprises are as follows: LiNO
3, 0～65%; KNO
3, 30～95%; Ca (NO
3)
2, 0～60%.This nitric acid congruent melting salt not only can be used as the molten salt electrolyte of high-temperature battery, and can be used as the dielectric material that heat transmits.
The present invention is described in further detail below in conjunction with embodiment and accompanying drawing, but embodiments of the present invention are not limited thereto.
Embodiment 1
A kind of nitric acid congruent melting salt, the component that it comprises and constituent mass percentage are as follows: LiNO
3, 23%; KNO
3, 62%; Ca (NO
3)
2, 15%.
Use raw material to comprise LiNO
3, KNO
3And Ca (NO
3)
24H
2O, material purity is equal〉99%.Take by weighing 2.3g LiNO
3, 6.2g KNO
3, 2.16g Ca (NO
3)
24H
2O is measured deionized water 150ml; With load weighted each constituent element, pour in the deionized water, stir and ultrasonic dissolution; The solution that mixes is heated to 100 ℃ of distillations; The solute that distillation is remaining is put into high temperature furnace, at 140 ℃ of following fusion 16h, cools to room temperature then with the furnace; The solid abrasive of cooling gained is extremely Powdered, to sieve, sealing is subsequently preserved, and can obtain required nitric acid congruent melting salt.
Use STA449F3DSC/DTA-TG type simultaneous thermal analysis instrument that the prepared nitric acid congruent melting salt of present embodiment is carried out the DTA-TG test under the rate of heat addition of 10K/min.The DTA-TG curve that obtains of test as shown in Figure 1, test result shows that this nitric acid congruent melting salt exothermic peak starting point is near 113.4 ℃ (being the fused salt fusing point), peak value is 121.4 ℃; In order to determine heat decomposition temperature more accurately, the heavy weightless starting point of our heat-obtaining is the heat decomposition temperature (being thermal stable temperature) of fused salt, and Fig. 1 shows that the thermogravimetric starting point of this fused salt is near 628 ℃.
Nitric acid congruent melting salt to the present embodiment preparation carries out the conductivity test, and test result as shown in Figure 2.Even the ionic conductivity of this molten salt electrolyte is in the time of 150 ℃, conductivity is near 0.07S/cm; And in the time of 300 ℃, then reach 0.5S/cm nearly.This nitric acid congruent melting salt has potential using value in the molten salt electrolyte field.
Embodiment 2
A kind of nitric acid congruent melting salt, the component that it comprises and constituent mass percentage are as follows: LiNO
3, 13%; KNO
3, 67%; Ca (NO
3)
2, 20%.
Use raw material to comprise LiNO
3, KNO
3And Ca (NO
3)
24H
2O, material purity is equal〉99%.Take by weighing 1.3g LiNO
3, 6.7g KNO
3, 2.88g Ca (NO
3)
24H
2O is measured deionized water 150ml; With load weighted each constituent element, pour in the deionized water, stir and ultrasonic dissolution; The solution that mixes is heated to 100 ℃ of distillations; The solute that distillation is remaining is put into high temperature furnace, at 300 ℃ of following fusion 16h, cools to room temperature then with the furnace; The solid abrasive of cooling gained is extremely Powdered, to sieve, sealing is subsequently preserved, and can obtain required nitric acid congruent melting salt.
Use STA449F3DSC/DTA-TG type simultaneous thermal analysis instrument that the prepared nitric acid congruent melting salt of present embodiment is carried out the DTA-TG test under the rate of heat addition of 10K/min.The DTA-TG curve that test obtains as shown in Figure 3.Test result shows that this nitric acid congruent melting salt exothermic peak starting point is near 109.4 ℃ (being the fused salt fusing point), and peak value is 122.6 ℃; The weightless starting point of thermogravimetric is near 611 ℃.
Embodiment 3
A kind of nitric acid congruent melting salt, the component that it comprises and constituent mass percentage are as follows: LiNO
3, 18%; KNO
3, 64.5%; Ca (NO
3)
2, 17.5%.Concrete preparation method is with reference to embodiment 1.
The DTA-TG curve of the nitric acid congruent melting salt of present embodiment preparation as shown in Figure 4, test result shows that this nitric acid congruent melting salt exothermic peak starting point is near 118.6 ℃ (being the fused salt fusing point), peak value is 122.6 ℃; The weightless starting point of thermogravimetric is near 576 ℃.
Embodiment 4
A kind of nitric acid congruent melting salt, the component that it comprises and constituent mass percentage are as follows: LiNO
3, 28%; KNO
3, 59.5%; Ca (NO
3)
2, 12.5%.Concrete preparation method is with reference to embodiment 1.
The DTA-TG curve of the nitric acid congruent melting salt of present embodiment preparation as shown in Figure 5, test result shows that this nitric acid congruent melting salt exothermic peak starting point is near 111.8 ℃ (being the fused salt fusing point), peak value is 119.4 ℃; The weightless starting point of thermogravimetric is near 627.6 ℃.
Embodiment 5
A kind of nitric acid congruent melting salt, the component that it comprises and constituent mass percentage are as follows: LiNO
3, 33%; KNO
3, 57%; Ca (NO
3)
2, 10%.Concrete preparation method is with reference to embodiment 1.
The DTA-TG curve of the nitric acid congruent melting salt of present embodiment preparation as shown in Figure 6, test result shows that this nitric acid congruent melting salt exothermic peak starting point is near 111.6 ℃ (being the fused salt fusing point), peak value is 121.1 ℃; The weightless starting point of thermogravimetric is near 602 ℃.
Embodiment 6
A kind of nitric acid congruent melting salt, the component that it comprises and constituent mass percentage are as follows: LiNO
3, 30.5%; KNO
3, 69.5%; Ca (NO
3)
2, 0%.Concrete preparation method is with reference to embodiment 1.
The DTA-TG curve of the nitric acid congruent melting salt of present embodiment preparation as shown in Figure 7, test result shows that this nitric acid congruent melting salt exothermic peak starting point is near 131.8 ℃ (being the fused salt fusing point), peak value is 134.9 ℃; The weightless starting point of thermogravimetric is near 585 ℃.
Embodiment 7
A kind of nitric acid congruent melting salt, the component that it comprises and constituent mass percentage are as follows: LiNO
3, 9%; KNO
3, 90%; Ca (NO
3)
2, 1%.Concrete preparation method is with reference to embodiment 2.
The DTA-TG curve of the nitric acid congruent melting salt of present embodiment preparation as shown in Figure 8, test result shows that this nitric acid congruent melting salt exothermic peak starting point is near 133.3 ℃ (being the fused salt fusing point), peak value is 137.1 ℃; The weightless starting point of thermogravimetric is near 638 ℃.
Embodiment 8
A kind of nitric acid congruent melting salt, the component that it comprises and constituent mass percentage are as follows: LiNO
3, 43%; KNO
3, 52%; Ca (NO
3)
2, 5%.Concrete preparation method is with reference to embodiment 1.
The DTA-TG curve of the nitric acid congruent melting salt of present embodiment preparation as shown in Figure 9, test result shows that this nitric acid congruent melting salt exothermic peak starting point is near 111.7 ℃ (being the fused salt fusing point), peak value is 132 ℃; The weightless starting point of thermogravimetric is near 582 ℃.
Embodiment 9
A kind of nitric acid congruent melting salt, the component that it comprises and constituent mass percentage are as follows: LiNO
3, 53%; KNO
3, 47%; Ca (NO
3)
2, 0%.Concrete preparation method is with reference to embodiment 1.
The DTA-TG curve of the nitric acid congruent melting salt of present embodiment preparation as shown in figure 10, test result shows that this nitric acid congruent melting salt exothermic peak starting point is near 131.2 ℃ (being the fused salt fusing point), peak value is 146.6 ℃; The weightless starting point of thermogravimetric is near 605 ℃.
A kind of nitric acid congruent melting salt, the component that it comprises and constituent mass percentage are as follows: LiNO
3, 13%; KNO
3, 60%; Ca (NO
3)
2, 27%.Concrete preparation method is with reference to embodiment 2.
The DTA-TG curve of the nitric acid congruent melting salt of present embodiment preparation as shown in figure 11, test result shows that this nitric acid congruent melting salt exothermic peak starting point is near 121.4 ℃ (being the fused salt fusing point), peak value is 127.7 ℃; The weightless starting point of thermogravimetric is near 589 ℃.
Embodiment 11
A kind of nitric acid congruent melting salt, the component that it comprises and constituent mass percentage are as follows: LiNO
3, 33%; KNO
3, 42%; Ca (NO
3)
2, 25%.Concrete preparation method is with reference to embodiment 2.
The DTA-TG curve of the nitric acid congruent melting salt of present embodiment preparation as shown in figure 12, test result shows that this nitric acid congruent melting salt exothermic peak starting point is near 147.7 ℃ (being the fused salt fusing point), peak value is 153.9 ℃; The weightless starting point of thermogravimetric is near 582 ℃.
Embodiment 12
A kind of nitric acid congruent melting salt, the component that it comprises and constituent mass percentage are as follows: LiNO
3, 35%; KNO
3, 40%; Ca (NO
3)
2, 25%.Concrete preparation method is with reference to embodiment 2.
The DTA-TG curve of the nitric acid congruent melting salt of present embodiment preparation as shown in figure 13, test result shows that this nitric acid congruent melting salt exothermic peak starting point is near 145.3 ℃ (being the fused salt fusing point), peak value is 154 ℃; The weightless starting point of thermogravimetric is near 578 ℃.
Embodiment 13
A kind of nitric acid congruent melting salt, the component that it comprises and constituent mass percentage are as follows: LiNO
3, 60%; KNO
3, 40%; Ca (NO
3)
2, 0%.Concrete preparation method is with reference to embodiment 2.
The DTA-TG curve of the nitric acid congruent melting salt of present embodiment preparation as shown in figure 14, test result shows that this nitric acid congruent melting salt exothermic peak starting point is near 119.3 ℃ (being the fused salt fusing point), peak value is 140.6 ℃; The weightless starting point of thermogravimetric is near 573 ℃.
Embodiment 14
A kind of nitric acid congruent melting salt, the component that it comprises and constituent mass percentage are as follows: LiNO
3, 5%; KNO
3, 80%; Ca (NO
3)
2, 15%.Concrete preparation method is with reference to embodiment 2.
The DTA-TG curve of the nitric acid congruent melting salt of present embodiment preparation as shown in figure 15, test result shows that this nitric acid congruent melting salt exothermic peak starting point is near 126.2 ℃ (being the fused salt fusing point), peak value is 134.9 ℃; The weightless starting point of thermogravimetric is near 595 ℃.
Embodiment 15
A kind of nitric acid congruent melting salt, the component that it comprises and constituent mass percentage are as follows: LiNO
3, 0%; KNO
3, 90%; Ca (NO
3)
2, 10%.Concrete preparation method is with reference to embodiment 2.
The DTA-TG curve of the nitric acid congruent melting salt of present embodiment preparation as shown in figure 16, test result shows that first exothermic peak starting point of this nitric acid congruent melting salt is near 129 ℃ (being the fused salt fusing point), peak value is 134.3 ℃; Second exothermic peak (309.3 ℃) is that this nitric acid congruent melting salt phase transformation causes, but the TG curve do not reduce, and as seen it is still stable under this temperature; The weightless starting point of thermogravimetric is near 632 ℃.
Embodiment 16
A kind of nitric acid congruent melting salt, the component that it comprises and constituent mass percentage are as follows: LiNO
3, 2.5%; KNO
3, 95%; Ca (NO
3)
2, 2.5%.Concrete preparation method is with reference to embodiment 2.
The DTA-TG curve of the nitric acid congruent melting salt of present embodiment preparation as shown in figure 17, test result shows that first exothermic peak starting point of this nitric acid congruent melting salt is near 128.8 ℃ (being the fused salt fusing point), peak value is 134.9 ℃; Second exothermic peak (307.8 ℃) is that this nitric acid congruent melting salt phase transformation causes, but the TG curve do not reduce, and as seen it is still stable under this temperature; The weightless starting point of thermogravimetric is near 619 ℃.
Embodiment 17
A kind of nitric acid congruent melting salt, the component that it comprises and constituent mass percentage are as follows: LiNO
3, 15%; KNO
3, 35%; Ca (NO
3)
2, 50%.Concrete preparation method is with reference to embodiment 2.
The DTA-TG curve of the nitric acid congruent melting salt of present embodiment preparation as shown in figure 18, test result shows that this nitric acid congruent melting salt exothermic peak starting point is near 138.5 ℃ (being the fused salt fusing point), peak value is 147.5 ℃; The weightless starting point of thermogravimetric is near 554 ℃.
Embodiment 18
A kind of nitric acid congruent melting salt, the component that it comprises and constituent mass percentage are as follows: LiNO
3, 65%; KNO
3, 30%; Ca (NO
3)
2, 5%.Concrete preparation method is with reference to embodiment 2.
The DTA-TG curve of the nitric acid congruent melting salt of present embodiment preparation as shown in figure 19, test result shows that this nitric acid congruent melting salt exothermic peak starting point is near 112.2 ℃ (being the fused salt fusing point), peak value is 121.5 ℃; The weightless starting point of thermogravimetric is near 573 ℃.
Embodiment 19
A kind of nitric acid congruent melting salt, the component that it comprises and constituent mass percentage are as follows: LiNO
3, 10%; KNO
3, 30%; Ca (NO
3)
2, 60%.Concrete preparation method is with reference to embodiment 2.
The DTA-TG curve of the nitric acid congruent melting salt of present embodiment preparation as shown in figure 20, test result shows that this nitric acid congruent melting salt exothermic peak starting point is near 138.5 ℃ (being the fused salt fusing point), peak value is 146.2 ℃; The weightless starting point of thermogravimetric is near 548 ℃.
A kind of nitric acid congruent melting salt, the component that it comprises and constituent mass percentage are as follows: LiNO
3, 60%; KNO
3, 35%; Ca (NO
3)
2, 5%.Concrete preparation method is with reference to embodiment 2.
The DTA-TG curve of the nitric acid congruent melting salt of present embodiment preparation as shown in figure 21, test result shows that this nitric acid congruent melting salt exothermic peak starting point is near 112.2 ℃ (being the fused salt fusing point), peak value is 123.5 ℃; The weightless starting point of thermogravimetric is near 561 ℃.
Embodiment 21
A kind of nitric acid congruent melting salt, the component that it comprises and constituent mass percentage are as follows: LiNO
3, 10%; KNO
3, 80%; Ca (NO
3)
2, 10%.Concrete preparation method is with reference to embodiment 2.
The DTA-TG curve of the nitric acid congruent melting salt of present embodiment preparation as shown in figure 22, test result shows that this nitric acid congruent melting salt exothermic peak starting point is near 118.2 ℃ (being the fused salt fusing point), peak value is 135.1 ℃; The weightless starting point of thermogravimetric is near 594 ℃.
Embodiment 22
A kind of nitric acid congruent melting salt, the component that it comprises and constituent mass percentage are as follows: LiNO
3, 10%; KNO
3, 90%; Ca (NO
3)
2, 0%.Concrete preparation method is with reference to embodiment 2.
The DTA-TG curve of the nitric acid congruent melting salt of present embodiment preparation as shown in figure 23, test result shows that this nitric acid congruent melting salt exothermic peak starting point is near 129.9 ℃ (being the fused salt fusing point), peak value is 139.8 ℃; The weightless starting point of thermogravimetric is near 629 ℃.
Embodiment 23
A kind of nitric acid congruent melting salt, the component that it comprises and constituent mass percentage are as follows: LiNO
3, 15.5%; KNO
3, 54.5%; Ca (NO
3)
2, 30%.Concrete preparation method is with reference to embodiment 1.
The DTA-TG curve of the nitric acid congruent melting salt of present embodiment preparation as shown in figure 24, test result shows that this nitric acid congruent melting salt exothermic peak starting point is near 117.4 ℃ (being the fused salt fusing point), peak value is 129.5 ℃; The weightless starting point of thermogravimetric is near 597 ℃.
Embodiment 24
A kind of nitric acid congruent melting salt, the component that it comprises and constituent mass percentage are as follows: LiNO
3, 20%; KNO
3, 40%; Ca (NO
3)
2, 40%.Concrete preparation method is with reference to embodiment 2.
The DTA-TG curve of the nitric acid congruent melting salt of present embodiment preparation as shown in figure 25, test result shows that this nitric acid congruent melting salt exothermic peak starting point is near 143 ℃ (being the fused salt fusing point), peak value is 150.9 ℃; The weightless starting point of thermogravimetric is near 560 ℃.
Performances such as the constituent content of each embodiment and thermal performance temperature thereof are summarized in table 1 among the present invention.
Table 1
Claims (7)
1. a class nitric acid congruent melting salt is characterized in that described nitric acid congruent melting salt constituent mass percentage is:
LiNO
3，0～65%；
KNO
3，30～95%；
Ca(NO
3)
2，0～60%。
2. nitric acid congruent melting salt as claimed in claim 1 is characterized in that the mass percent of described nitric acid congruent melting salt component is:
LiNO
3，5～60%；
KNO
3，40～90%；
Ca(NO
3)
2，1～30%。
3. nitric acid congruent melting salt as claimed in claim 1 or 2 is characterized in that described nitric acid congruent melting salt exothermic peak starting point is lower than 150 ℃, and the thermal weight loss starting point is higher than 500 ℃.
4. nitric acid congruent melting salt as claimed in claim 3 is characterized in that described nitric acid congruent melting salt exothermic peak starting point is 109.4 ℃, and the thermal weight loss starting point is 638 ℃.
5. nitric acid congruent melting salt as claimed in claim 1 or 2 is characterized in that:
1. be 13LiNO by mass percent
3-67KNO
3-20Ca (NO
3)
2The exothermic peak starting point of the nitric acid congruent melting salt of forming is 109.4 ℃, and the weightless starting point of thermogravimetric is 611 ℃;
2. by 23LiNO
3-62KNO
3-15Ca (NO
3)
2The exothermic peak starting point of the nitric acid congruent melting salt of forming is 113.4 ℃, and the weightless starting point of thermogravimetric is 628 ℃;
3. by 9LiNO
3-90KNO
3-1Ca (NO
3)
2The weightless starting point of the thermogravimetric of the nitric acid congruent melting salt of forming is 638 ℃; The exothermic peak starting point is 133.3 ℃.
6. the purposes of nitric acid congruent melting salt as claimed in claim 1 or 2 is characterized in that as the molten-salt electrolysis material of high-energy battery or the dielectric material that transmits as heat.
7. purposes as claimed in claim 6 is characterized in that:
1. be operated in 150-500 ℃ of temperature range as the molten salt electrolyte material;
2. as the dielectric material of heat transmission, the working temperature window is wide, can improve resistance to extreme temperature to the restriction of Rankine circulation gross efficiency.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310138699 CN103259028A (en) | 2013-04-18 | 2013-04-18 | Molten nitrate salt and application thereof |
| CN2013103607666A CN103401001A (en) | 2013-04-18 | 2013-08-16 | High-energy battery |
| CN2013103603010A CN103413953A (en) | 2013-04-18 | 2013-08-16 | Eutectic molten nitrate and applications thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310138699 CN103259028A (en) | 2013-04-18 | 2013-04-18 | Molten nitrate salt and application thereof |
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Cited By (6)
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| CN105199678A (en) * | 2015-10-30 | 2015-12-30 | 百吉瑞（天津）新能源有限公司 | Mixed molten salt type heat transfer and storage working medium and application thereof |
| CN105199677A (en) * | 2015-10-30 | 2015-12-30 | 百吉瑞（天津）新能源有限公司 | Low-melting-point mixed molten salt heat transfer and thermal storage working medium and application thereof |
| CN105219355A (en) * | 2015-10-30 | 2016-01-06 | 百吉瑞（天津）新能源有限公司 | A kind of fused salt mixt heat transfer accumulation of heat working medium and application thereof |
| CN105219356A (en) * | 2015-10-30 | 2016-01-06 | 百吉瑞（天津）新能源有限公司 | A kind of fused salt mixt heat transfer accumulation of heat working medium and application thereof |
| CN105542726A (en) * | 2016-02-18 | 2016-05-04 | 百吉瑞（天津）新能源有限公司 | Mixed molten salt heat transfer and storage working medium and preparing method and application thereof |
| WO2022133620A1 (en) * | 2020-12-23 | 2022-06-30 | Universidad De Antofagasta | Method for obtaining nitrate-based eutectic mixtures for heat storage in solar refrigeration systems, and said eutectic mixtures |
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| DE3925482A1 (en) * | 1988-10-12 | 1990-04-19 | Metzeler Gmbh | HEAT CARRIER LIQUID |
| CN1142235C (en) * | 2000-01-01 | 2004-03-17 | 华东理工大学 | Fused salts mixture (LiNO3-KNO3-NaNO3-NaNO2) and its preparing process |
| CN100346510C (en) * | 2005-07-27 | 2007-10-31 | 浙江大学 | Surface modified positive pole material of lithium ion cell and preparation method thereof |
| US7828990B1 (en) * | 2008-02-14 | 2010-11-09 | Sandia Corporation | Low-melting point heat transfer fluid |
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| CN102544535A (en) * | 2010-12-24 | 2012-07-04 | 中国电子科技集团公司第十八研究所 | Electrolyte for thermal battery and provided with 5-component inorganic fused salt |
| CN102433104B (en) * | 2011-09-26 | 2014-06-11 | 上海交通大学 | Heat-transfer fluid, preparation method for same and use thereof |
| CN102533226A (en) * | 2011-12-15 | 2012-07-04 | 中山大学 | Nitrate molten salt heat transferring and reserving medium and preparation method and application thereof |
| CN102437345A (en) * | 2011-12-19 | 2012-05-02 | 梅岭化工厂 | Thermal battery electrolyte with low melting point and high electric conductivity and preparation method thereof |
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2013
- 2013-04-18 CN CN 201310138699 patent/CN103259028A/en active Pending
- 2013-08-16 CN CN2013103607666A patent/CN103401001A/en active Pending
- 2013-08-16 CN CN2013103603010A patent/CN103413953A/en active Pending
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| CN105199678A (en) * | 2015-10-30 | 2015-12-30 | 百吉瑞（天津）新能源有限公司 | Mixed molten salt type heat transfer and storage working medium and application thereof |
| CN105199677A (en) * | 2015-10-30 | 2015-12-30 | 百吉瑞（天津）新能源有限公司 | Low-melting-point mixed molten salt heat transfer and thermal storage working medium and application thereof |
| CN105219355A (en) * | 2015-10-30 | 2016-01-06 | 百吉瑞（天津）新能源有限公司 | A kind of fused salt mixt heat transfer accumulation of heat working medium and application thereof |
| CN105219356A (en) * | 2015-10-30 | 2016-01-06 | 百吉瑞（天津）新能源有限公司 | A kind of fused salt mixt heat transfer accumulation of heat working medium and application thereof |
| CN105542726A (en) * | 2016-02-18 | 2016-05-04 | 百吉瑞（天津）新能源有限公司 | Mixed molten salt heat transfer and storage working medium and preparing method and application thereof |
| WO2022133620A1 (en) * | 2020-12-23 | 2022-06-30 | Universidad De Antofagasta | Method for obtaining nitrate-based eutectic mixtures for heat storage in solar refrigeration systems, and said eutectic mixtures |
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| Publication number | Publication date |
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| CN103401001A (en) | 2013-11-20 |
| CN103413953A (en) | 2013-11-27 |
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