tantalum powders avoid

Magnesiothermic Reduction of Mg4Ta2O9 in the Combustion

The use of Mg 4 Ta 2 O 9 as a precursor for the reduction process has made it possible to increase the degree of reduction and the specific surface area of tantalum powders. We have obtained powders with a specific surface area of up to 21 m 2 /g, which is a factor of 4–5 larger than in the case of the reduction of Ta 2 O 5 under the same ...Web

Magnesium Vapor Reduction of Tantalum Oxide Compounds in …

The mesoporous structure of the powders was confirmed by Orlov et al., who obtained tantalum powder with a specific surface area of 85 m 2 /g by reducing Mg 4 Ta 2 O 9. In this paper, we examine the feasibility of increasing the specific surface area of tantalum powders in the process of magnesium vapor reduction of Ta 2 O 5 and Mg 4 …Web

On the Formation of a Relief on the Surface of Tantalum during Its

The crystal structure of the studied powders is characterized by a body-centered cubic (bcc) lattice with the space group Im3m.In the angular range 34°–37°, there are low peaks indicating the presence of tantalum-nitride traces ().X-ray diffraction studies of the sintered samples showed that the structure–phase composition did not change …Web

1. Identification

Product Name Tantalum powder No. : 10345 CAS-No Synonyms No information available ... Conditions to Avoid Incompatible products. Incompatible Materials Acids, ... Proper Shipping Name METAL POWDERS, FLAMMABLE, N.O.S. Technical Name (Tantalum powder) Hazard Class 4.1 Packing Group II TDGWeb

Additive manufacturing of tantalum

The angular tantalum powder had a BET of about 0.1 m 2 /g. Fig. 1 shows SEM images of this feed angular tantalum powder (panel A) and powder after plasma spheroidization. Angular powder was fully dense and bulk density of the powder was >99.9% of theoretical density of tantalum (density of tantalum = 16.6 g/cm 3 ).Web

Preparation of Tantalum Powders via the Sodium Reduction …

Abstract—Tantalum powders have been prepared by sodium reduction in melts containing potassium hep tafluorotantalate ( K 2TaF 7) heattreated in air. Their specific surface ar ea is three to four times that of powders obtained by reducing unheattreated K 2TaF 7 under the same conditions. The increase in specific surface areaWeb

SAFETY DATA SHEET Revision Date 10/27/2023 Version 6

1.1 Product identifiers Product name : Tantalum Product Number Brand CAS-No. : 545007 : Aldrich : 1.2 Relevant identified uses of the substance or mixture and uses …Web

Microstructure and strengthening mechanisms of tantalum prepared …

The LMD system has a 1070 nm wavelength laser, a five-axis computer-controlled workstation, and a chamber filled with high-purity argon where the oxygen content and H 2 O content are controlled to be below 30 ppm in order to avoid oxidation. The tantalum powders were delivered to the molten pool through a coaxial nozzle at a …Web

Safety Data Sheet

Avoid creating fine dusts, because as a powder, this product is capable of creating a dust explosion. Hazardous combustion products: Various elemental metals and oxides may be generated ... Canadian TDG: Metal powders, flammable, n.o.s. (Tantalum powder) Section 15: Regulatory Information United States Federal RegulationsWeb

Heat Treatment of Tantalum and Niobium Powders Prepared by …

Changes in the specific surface area and porous structure of tantalum and niobium powders, which were prepared by magnesium-thermic reduction of Ta 2 O 5, Mg 4 Ta 2 O 9, and Mg 4 Nb 2 O 9 oxide compounds and subjected to heat treatments at temperatures of 600–1500°C, have been studied. It is noted that, owing to the …Web

MATERIAL SAFETY DATA SHEET

Conditions to Avoid: None reported Incompatibility (Material to Avoid): Tantalum powders react violently with fluorine, chlorine and bromine trifluoride. Contact of metallic dust with strong oxidizers may cause fire/explosions. Hazardous Decomposition Products: Various elemental metals and oxides may be generated from melting or dross handling operations.Web

Characterization of Tantalum–Titanium Powders with

Three blended tantalum and titanium powders were used: Ta–60Ti, Ta–50Ti, Ta–40Ti alloys. Commercially pure titanium and tantalum powders are used. The tantalum powders (HC Starck), are fused and crushed with an angular morphology. According to the specification less than 1 wt % + 90 µm and less than 5 wt % – 45 µm.Web

Fabrication and characterization of powder metallurgy tantalum

In this present study, coarse and fine tantalum powders supplied by H.C.Starck and Qingdao Terio Corporation (designated as PTaA and PTaB) were used and their characteristics were shown in Table 1.The average particle sizes of the powders were 25.57 for PTaA and 6.69 μm for PTaB, respectively.The particle size distributions were …Web

Features of Segregation of the Oxide Phase during Sintering of Tantalum

The tantalum powders with the developed surface were obtained by reduction of tantalum pentoxide and tantalate Mg 4 Ta 2 O 9 with magnesium vapors. The process occurred for 5 h at a temperature of 830°C and a residual argon pressure of 5 kPa in the reactor [].The specific surface areas of the powders obtained by reduction of Та 2 …Web

Corrosion Properties of Cold-Sprayed Tantalum Coatings

Avoid common mistakes on your manuscript. Introduction. Cold spraying, the latest thermal spray technique, developed in the former Soviet Union in the 1980s, is based on the use of significantly lower process temperatures with high particle velocities than those in other thermal spray techniques. ... Two as-received tantalum powders …Web

1. Identification

Tantalum powder Revision Date 20-Feb-2020 Precautionary Statements Prevention Wash face, hands and any exposed skin thoroughly after handling Wear protective …Web

Reduction of Tantalum Pentoxide

To avoid such difﬁculty, self-propagating high-temperature synthesis (SHS) has been studied with preform compacted with magnesium powder [12–14]. In spite of the above-mentioned drawbacks, many works on magnesiothermic ... Tantalum metal powders were then obtained. We characterized the microstructure, phase evaluation, and chemical ...Web

Safety Data Sheet

Potential health effects Primary Routes of entry (powders or dust): Inhalation and ingestion. Signs and Symptoms of Overexposure: ND Eyes: May cause mild irritation. No chronic …Web

GAM Technology

Our Aizu plant, north of Tokyo, has been producing the world's high quality, highest capacitance capacitor powders for more than 40 years. This facility has consistently been an industry leader in the commercial production of "next-generation" capacitor-grade tantalum powders. The Aizu team are intensely focused on advanced tantalum ...Web

Effect of Phosphorus Impurities in Precursors on

Phosphorus in metals has different effects on their characteristics. Trace levels of phosphorus inhibit sintering of tantalum [1–3] and niobium powders [3, 4], thus helping to maintain their specific surface area unchanged and ensuring a higher specific capacity of tantalum and niobium anodes for bulk porous capacitors.Phosphorus doping …Web

(PDF) Metals Powders: Synthesis and Processing

The particle size in the tantalum powder obtained after acid leaching was shown to be in a range of 50~300 nm, and the mean internal crystallite sizes measured by the Scherrer equation varied from ...Web

Effects of reuse on the properties of tantalum powders and …

To evaluate the effects of reuse of the tantalum powder on the properties of tantalum parts and scaffolds, this study investigated the characteristics of tantalum …Web

Preparation of high-purity tantalum powders by sodium

This paper examines the possibility of preparing high-purity sodium-reduced tantalum powders with a large specific surface area. We demonstrate that such powders have a larger specific surface area when prepared using potassium heptafluorotantalate based melts containing tantalum oxyfluoride compounds. The purity and specific surface …Web

Calcium Vapor Reduction of Tantalum Oxide Compounds

Abstract— Calcium vapor reduction of Ta2O5 and Mg4Ta2O9 has been studied at temperatures from 750 to 850°C. We have found out specific features of the pore structure of the calciothermic tantalum powders and assessed the effect of precursor particle size on the degree of reduction. To reduce the Mg4Ta2O9 tantalate with an …Web

MATERIAL SAFETY DATA SHEET

Conditions to Avoid: None reported Incompatibility (Material to Avoid): Tantalum powders react violently with fluorine, chlorine and bromine trifluoride. Contact of metallic dust with …Web

Reduction of Tantalum Pentoxide

To avoid such difﬁculty, self-propagating high-temperature synthesis (SHS) has been studied with preform compacted with magnesium ... Tantalum metal powders were then obtained. We characterized ...Web

Additive manufacturing of tantalum – A study of

In this study, spherical tantalum (Ta) powders, having different oxygen contents, were fabricated by a radio frequency plasma spheroidization technique. A laser powder bed fusion (LPBF) technique ...Web

MATERIAL SAFETY DATA SHEET

Avoid contact with skin and wash hands before eating and at the end of the work day. SECTION 9 - SPECIAL PRECAUTIONS Handling and storage: Keep container tightly closed. Store in a cool, dry, ... Proper shipping name – tantalum – metal powders, flammable, n.o.s., powder. TANTALUM MATERIAL SAFETY DATA SHEET, Page 5 of 4 …Web

Additive manufacturing of tantalum

Tantalum and niobium powders for electrolytic capacitors

Capacitor grade tantalum powders are mainly produced by the sodiothermic reduction of potassium ... dehydrated CaCl2 powder and Ta2O5 powder were set in a tantalum crucible to avoid the ...Web