scholarly journals Preparation of a superfine RDX/Al composite as an energetic material by mechanical ball-milling method and the study of its thermal properties

RSC Advances ◽  
2018 ◽  
Vol 8 (66) ◽  
pp. 38047-38055 ◽  
Author(s):  
Lei Xiao ◽  
Yan Zhang ◽  
Xiaohong Wang ◽  
Gazi Hao ◽  
Jie Liu ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Ball Milling ◽  
Energetic Material ◽  
Mass Ratio ◽  
Al Composite ◽  
Milling Method ◽  
Mechanical Ball Milling

To research the influence of aluminum (Al) on the decomposition of 1,3,5-trimethylene trinitramine (RDX), superfine RDX/Al composite with a mass ratio of 70/30 was prepared by mechanical ball milling.

Effect of Raw Materials on Properties of Coated Al2O3-Al Cermet Materials via Vacuum Sintering Method

2020 ◽  
Vol 858 ◽  
pp. 53-58
Author(s):  
Ai Xia Chen ◽  
Chao Yang ◽  
Rui Hua Wang ◽  
Fang Wang ◽  
Ming Han Xu ◽  
...  
Keyword(s):  
Ball Milling ◽  
Raw Materials ◽  
Surface Hardness ◽  
Chemical Precipitation ◽  
Chemical Precipitation Method ◽  
Precipitation Method ◽  
Cermet Material ◽  
Milling Method ◽  
Cermet Materials ◽  
Mechanical Ball Milling

In this paper, the effect of raw materaisl on the properties of coated Al2O3/Al cermet materials were investigated, the raw materials were prepared via different methods, which provide a reference for obtaining higher performance cermet materials. Through mixing, molding, sintering, sample preparation, scanning electron microscopic observation, energy spectrometer observation and analysis, the following conclusions can be drawn, the density of the cermet material prepared by the mechanical ball milling method (83.5%) is higher than that of the cermet material prepared by the chemical precipitation method (92.8%). It is nearly 10% lower. The alumina particles prepared by the ball milling method are agglomerated, and a large amount of agglomeration occurs in the aluminum, and the composition is very uneven. For materials prepared by the precipitation method, the aluminum oxide is uniformly distributed in the aluminum. The ball-milling powder is used to prepare materials, most of the alumina is in the form of particles, and in the precipitation method. In the powder preparation sample, the thin layer of alumina which forms the same eggshell envelops the aluminum, and the aluminum has a certain liquid phase change. the surface hardness (824HV) of the cermet material prepared by the mechanical ball milling method is lower than the surface hardness (1005HV) of the cermet material prepared by the chemical precipitation method.

Facile Synthesis and Optical Properties of TiN/Al Composite Powders with Nano/Microstructure by Ball-Milling Method

2013 ◽  
Vol 853 ◽  
pp. 17-22
Author(s):  
Dun Pu Zhang ◽  
Dan Xu ◽  
Chun Hua Lu ◽  
Ya Ru Ni ◽  
Zhong Zi Xu
Keyword(s):  
Electron Microscopy ◽  
Ball Milling ◽  
High Energy ◽  
Distribution Analysis ◽  
Composite Powders ◽  
Tin Nanoparticles ◽  
Transmission Electron ◽  
Al Composite ◽  
Milling Method ◽  
Bonding Technology

TiN-coated aluminum pigments were prepared by nanoparticle-bonding technology of high-energy ball milling. The effect of ball milling on the morphology and evolution of the composite powders was investigated via field-emission scanning electron microscopy, transmission electron microscopy, and particle size distribution analysis. Results show that the TiN nanoparticles bonded to the surface of aluminum microflakes under the action of a mechanical force but in the absence of any binder. A uniform nanoparticle coating formed on the surface of the flake aluminum microparticle. The optical reflectance of the TiN/Al composites was measured within 200 nm to 2500 nm wavelength. The reflectance gradually decreased as the milling time was prolonged.

scholarly journals Cathode Properties of Na3MnPO4CO3 Prepared by the Mechanical Ball Milling Method for Na-Ion Batteries

Energies ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 4534 ◽  
Author(s):  
Baowei Xie ◽  
Ryo Sakamoto ◽  
Ayuko Kitajou ◽  
Kosuke Nakamoto ◽  
Liwei Zhao ◽  
...  
Keyword(s):  
Ball Milling ◽  
Discharge Capacity ◽  
Dimethyl Carbonate ◽  
Aqueous Electrolyte ◽  
High Current Density ◽  
Ethylene Carbonate ◽  
Initial Discharge ◽  
Milling Method ◽  
Nano Size ◽  
Mechanical Ball Milling

A novel carbonophosphate, Na3MnPO4CO3, was synthesized as a cathode material using a mechanical ball milling method with starting materials of MnCO3 and Na3PO4 without washing or drying. Duo to the formation of nano-size particles and good dispersion of the obtained Na3MnPO4CO3, the initial discharge capacity in an organic electrolyte of 1 M NaPF6/ethylene carbonate (EC): dimethyl carbonate (DMC) (1:1 v/v) was 135 mAh∙g−1 and 116 mAh∙g−1 at 1/30 C and 1/10 C, respectively. We also investigated the cathode properties of Na3MnPO4CO3 in an aqueous electrolyte of 17 m NaClO4. This is the first investigation of the electrochemical performance of Na3MnPO4CO3 with aqueous electrolyte. Na3MnPO4CO3 achieved a discharge capacity as large as 134 mAh g−1 even at a high current density of 2 mA cm−2 (0.5 C), because of the high ionic conductivity of the aqueous electrolyte of 17 m NaClO4.

scholarly journals Ultrafast Synthesis of Ni-MOF in One Minute by Ball Milling

Nanomaterials ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 1067 ◽  
Author(s):  
Ren Zhang ◽  
Cheng-An Tao ◽  
Rui Chen ◽  
Lifang Wu ◽  
Xiaoxuan Zou ◽  
...  
Keyword(s):  
Ball Milling ◽  
Milling Time ◽  
Metal Organic Framework ◽  
Crystal Water ◽  
High Capacitance ◽  
Highly Efficient ◽  
Milling Method ◽  
Metal Organic ◽  
Preliminary Preparation ◽  
Mechanical Ball Milling

A mechanical ball milling method for ultrafast synthesis of a nickel-based metal organic framework (Ni-MOF) has been proposed. The Ni-MOF was successfully synthesized in merely one minute without any solvent, additives, or preliminary preparation. The effect of milling time, mechano-frequency, type of assistant liquid, and amount of assistant water were systematically explored. It was found that the product can be obtained even only at a mechano-frequency of 10 Hz within one minute without any external solvent-assist, which indicated that the crystal water present in the nickel precursor was sufficient to promote MOF formation. Increasing the milling time, raising the mechano-frequency, and the addition of assistant solvent could promote the reaction and increase the yield. The method is rapid, highly efficient, eco-friendly, and has great scalability. The product generated within merely one minute even exhibited high capacitance.

Thermal conductivities, mechanical and thermal properties of graphite nanoplatelets/polyphenylene sulfide composites

RSC Advances ◽  
2014 ◽  
Vol 4 (42) ◽  
pp. 22101-22105 ◽  
Author(s):  
Junwei Gu ◽  
Junjie Du ◽  
Jing Dang ◽  
Wangchang Geng ◽  
Sihai Hu ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Ball Milling ◽  
Methanesulfonic Acid ◽  
Compression Molding ◽  
Polyphenylene Sulfide ◽  
Mechanical And Thermal Properties ◽  
Graphite Nanoplatelets ◽  
Molding Method ◽  
Mechanical Ball Milling ◽  
Thermal Conductivities

Functionalized pristine graphite nanoplatelets (fGNPs) by methanesulfonic acid/isopropyltrioleictitanate (MSA/NDZ-105) are used to fabricate fGNPs/polyphenylene sulfide (fGNPs/PPS) composites by mechanical ball milling followed by a compression molding method.

scholarly journals Cathode Properties of Na3FePO4CO3 Prepared by the Mechanical Ball Milling Method for Na-ion Batteries

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Baowei Xie ◽  
Ryo Sakamoto ◽  
Ayuko Kitajou ◽  
Kosuke Nakamoto ◽  
Liwei Zhao ◽  
...  
Keyword(s):  
Ball Milling ◽  
Milling Method ◽  
Mechanical Ball Milling

scholarly journals Effects of Processing Parameters on the Synthesis of (K0.5Na0.5)NbO3Nanopowders by Reactive High-Energy Ball Milling Method

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Nguyen Duc Van
Keyword(s):  
Ball Milling ◽  
Processing Parameters ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Mass Ratio ◽  
Stoichiometric Mixture ◽  
Powder Mass ◽  
Milling Method ◽  
Energy Ball ◽  
Carbonato Complex

The effects of ball milling parameters, namely, the ball-to-powder mass ratio and milling speed, on the synthesis of (K0.5Na0.5)NbO3nanopowders by high-energy ball milling method from a stoichiometric mixture containing Na2CO3, K2CO3, and Nb2O5were investigated in this paper. The results indicated that the single crystalline phase of (K0.5Na0.5)NbO3was received in as-milled samples synthesized using optimized ball-to-powder mass ratio of 35 : 1 and at a milling speed of 600 rpm for 5 h. In the optimized as-milled samples, no remaining alkali carbonates that can provide the volatilizable potassium-containing species were found and (K0.5Na0.5)NbO3nanopowders were readily obtained via the formation of an intermediate carbonato complex. This complex was mostly transformed into (K0.5Na0.5)NbO3at temperature as low as 350°C and its existence was no longer detected at spectroscopic level when calcination temperature crossed over 700°C.

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