Construction of a Novel Barium‐Free Green‐Light Emitting Illuminant Based on Boron Carbide

Huang, Zhiping; Xu, Shengliang; Chen, Xinli; Wang, Min; Yuan, Hua; Zhao, Huali; Zhang, Yuanyuan

doi:10.1002/prep.202100038

Cited by 4 publications

(6 citation statements)

References 24 publications

(23 reference statements)

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“…However, the color of Cu-based flames leans more toward yellowish-green (DW for CuOH ~547 nm) [9] and the moisture sensitivity of copper compounds presents handling challenges [20a]. In terms of Yb-based compounds, the high cost of Yb forbids practical use in numerous applications except for tracers where volume-restricted pyrotechnics are needed [22].…”

Section: Green Flame Productionmentioning

confidence: 99%

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A review of colored light production by pyrotechnic materials

Kanitkar,

Haynes,

Sabolsky

et al. 2023

Propellants Explo Pyrotec

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Pyrotechnics are a unique set of materials because they can be formulated to control combustion behavior to elicit desired effects such as light emission, smoke formation, and noise. The ability to enhance and control light emission is particularly desirable for entertainment purposes, as well as military applications. Designing such materials for high color purity at a specific wavelength requires an understanding of the different factors that affect their performance. This review will cover the various aspects of color production, including light emission mechanisms, components of a color composition, and key parameters that determine the optical wavelength band for these compositions. Additionally, because conventional pyrotechnic formulations are known to produce toxic emissions, less hazardous and sustainably formulated pyrotechnics for color production will also be reviewed. Finally, a short perspective is presented on the possible extension of pyrotechnic applications beyond conventional, civilian, and military purposes.

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Section: Green Flame Productionmentioning

confidence: 99%

“…Further evaluating binders used in KClO 4 / T A B L E 1 Sustainable pyrotechnic green flame compositions based on boron and its compounds (all values reported are in weight%). Brusnahan et al [32] Klapotke et al [30] Huang et al [22] *TNEB -Tris(2,2,2-trinitroethyl)-borate, **PTFE -polytetrafluoroethylene.…”

Section: Green Flame Productionmentioning

confidence: 99%

A review of colored light production by pyrotechnic materials

Kanitkar,

Haynes,

Sabolsky

et al. 2023

Propellants Explo Pyrotec

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“…The color purity can be increased to 45 % by replacing KNO3 oxidant with NH4ClO4. Z Huang [5] proposed an illuminant composed of boron carbide, potassium perchlorate and guanidine nitrate, with a wavelength of 562 nm, a combustion rate of 5~15 mm/s, a luminous intensity of 3.47×10 4 cd, and a spectral purity of 67.1%. J Sabatini [6] studied the oxidant components in illuminants and further solved environmental problems by replacing the polester-based Laminac 4116/Lupersol adhesive system with an epoxy-based Epon 813/Versamid 140 adhesive system.…”

Section: Introductionmentioning

confidence: 99%

Preparation and properties study of double flame agent synergetic radiation yellow light illuminant

Zhang,

Ba,

Wang

et al. 2023

3rd International Conference on Laser, Optics, and Optoelectronic Technology (LOPET 2023)

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Based on the principle of synergic radiation of double flame agent, a yellow light signal agent formula of red and green double flame agent is proposed, and the wavelength can be adjusted in the range of 576.4~591.3nm, the color changes from light yellow to dark yellow. Based on the theory of double flame agent synergetic radiation, the main illuminant components are Ba(NO3)2, SrNO3, Mg, shellac and PVC, to realize the yellow light color adjustable, and the best formula of yellow light color close to the traditional sodium salt illuminant was determined, and the flame combustion spectrum and luminous intensity of the illuminant were tested. The experimental results show that: By adjusting the ratio of two colors of flame, yellow illuminant with different wavelength and color purity can be obtained. When the ratio of Ba(NO3)2 to SrNO3 is 3:1, the color is more suitable for human observation, the formula is 40.5 % Ba(NO3)2, 13.5 % SrNO3, 40 % Mg, 2 % shellac and 4 % PVC, the luminous intensity is 222540.72cd, the wavelength is 587.5nm, and color purity is 74.1%.

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“…It is imperative that the colour produced by the pyrotechnic powder should be easily distinguishable from this background colour that occurs primarily from the combustion of coal. While many different pyrotechnic flame colours such as red, [4][5][6][7][8][9][10] blue, [11][12][13][14][15][16][17][18][19] green, [9,[20][21][22][23][24][25][26][27][28][29] and a combination of these three are possible, green was selected as an easily identifiable colour, and formulations that emit green light were synthesized for this study.…”

Section: Introductionmentioning

confidence: 99%

Development of green‐colour‐emitting pyrotechnics as a core for 3D temperature imaging sensors inside coal boilers

et al. 2022

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Efficiency in the control operation of the boilers for coal and coal with biomass can be further improved if the flue gas temperature distribution can be better characterized. This is very difficult in these harsh environmental systems, where spatially resolved measurements are nearly impossible with solid‐state sensors. In this work, we evaluate the development of pyrotechnic compounds that would serve as the basis for a novel optical mapping of the temperature inside coal boilers. For this purpose, various green‐colour‐emitting pyrotechnics using BaCl2 · 2H2O and Ba(NO3)2 as the green light source were prepared, as this colour offers a distinct signal from the combustion‐based background in the boiler. These pyrotechnics were characterized using thermogravimetric analysis (TGA) and X‐ray diffraction (XRD) and tested using a flat‐flame burner. Furthermore, the composition was varied to evaluate the effect of different metal fuels such as Sn, Co, and Mg, as well as various binders such as ethylcellulose, shellac, parlon, and PVC on green light emission. The emission intensity and the apparent ignition temperature were strongly dependent on the metal type, with Mg showing higher intensities. On the other hand, the effect of the binder showed that the ignition behaviour, emission intensity, and spectral purity were influenced by the nature and exothermicity of the binder. The addition of other potential green light‐producing materials, such as boric acid, increased the intensity of emission by 17% for a BaCl2 · 2H2O‐based composition. This study identified prospective compositions with intense and bright green‐colour emissions that have high spectral purities.

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Construction of a Novel Barium‐Free Green‐Light Emitting Illuminant Based on Boron Carbide

Cited by 4 publications

References 24 publications

A review of colored light production by pyrotechnic materials

A review of colored light production by pyrotechnic materials

Preparation and properties study of double flame agent synergetic radiation yellow light illuminant

Development of green‐colour‐emitting pyrotechnics as a core for 3D temperature imaging sensors inside coal boilers

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