Other name: niobium pentachloride; Niobium(V) chloride
Appearance: yellow monoclinic crystal
Uses: niobium pentachloride materials are widely used as raw materials for superconducting materials, coating materials for improving the special properties of metallic or non-metallic substrates, raw materials for producing superfine niobium powder and nano-niobium powder, and raw materials for producing high purity niobium compounds.
Molecular formula: Cl5Nb
Molecular weight: 270.173
The density (g/mL, 25 ℃) : 2.75.
Melting point (DCS) : 204.7.
Boiling point (dc, atmospheric pressure) : 250.
Solubility: soluble in water and water reactions.
Structure: solid niobium pentachloride is a dimer containing two chloride Bridges. Each niobium atom is a hexagonal deformation octahedral configuration, with two bridge bond lengths of 256pm, flat bond lengths of 225pm and straight bond lengths of 229.2 PM. Straight key inward deformation, and formation of two chlorine bridge plane Angle is 83.7 °, chlorine bridge of Nb – Cl – Nb bond Angle is 101.3 °. Nb-nb is relatively long at 398.8 PM, not enough to generate metal-to-metal interactions. Similar structures such as niobium pentabromide, tantalum pentaboride and tantalum pentabromide are also adopted. Niobium pentachloride is monomeric in the gas phase.
Molecular structural data:
Molar index of refraction: unusable
Molar volume (cm3/mol) : unusable
Isozhang specific volume (90.2k) : unusable
Surface tension (dyne/cm) : useless
Dielectric constant: useless
Polarization rate (10-24cm3) : useless
Single isotope mass: 267.750664 Da
Nominal quality: 268 Da
Average mass: 270.1714 Da
The synthetic methods:
The sample boat with 10g of niobium powder was put into the borosilicate glass reaction tube with internal diameter of 25mm and length of 900mm. Make chlorine gas at the rate of about 200 ml/min flow into the reaction tube at the same time, the part sample heated to 300 ℃ or so, the five niobium chloride yellow crystalline precipitate at room temperature in the reactor vessel part. The gas is absorbed completely in a chlorine absorber (a mixture of sodium hydroxide and sodium bicarbonate). Reaction after cooling, with rare gas displacement chlorine gas, and a rare gas in the air out of five niobium chloride, or niobium chloride precipitation reaction tube (Ⅴ) parts of the sealing ends (in this case, should be made in the reaction tube diameter of 10 mm neck). In addition, niobium pentoxide and six times the molar ratio of coal blending, to the sample dissolved into the flow of 200 ~ 300 ml/min of chlorine, chlorination reaction is carried out under the 500 ~ 700 ℃. Of five niobium chloride and acetone a niobium oxide NbOCl3 mixture, with chlorine gas through the carbon layer heated to 600 ℃, thus also five niobium chloride can be obtained.
Dangerous sign: C: Corrosive;
Risk terms: R22:Harmful if swallowed. R34: Causes burns.;
Specification: 99.9%, 99.99%
Other name: Niobium hydroxide oxide
CAS no. : 37349-30-7
Molecular formula: Nb(OH)5
Mainly used in catalyst, new energy and other new industry production.
English alias: TITANIUM CARBONITRIDE (7:3); TI (C/N) 30/70 a; TI (C/N) 30/70 b; TI (C/N) 30/70 C; TI (C/N) 50/50 a; TI (C/N) 50/50 b; TI (C/N) 50/50 C; Titanium carbon nitride; TiCN
CAS no. : 12654-86-3
Molecular weight: 121.75
Density: 5.08 g/mL at 25 ℃ (lit.)
Melting point: > 350 ℃ (lit.)
Bismuth vanadium tetraoxide
Other name:; Bismuth Vanadate Yellow; Bismuth vanadate; Bismuth Yellow; 184 Yellow ; vanadium(+5) cation; Bismuth vanadate: Bismuth orthovanadate
CAS no. : 14059-33-7
EINECS no. : 237-898-0
Molecular formula: BiO4V.
Molecular weight: 323.9195.
English alias: Tungsten (VI) chloride; Tungstenchloride; Tungsten (6 +) hexachloride; Tungsten (4 +) tetrachloride; Tungsten chloride
CAS no. : 13283-01-7
EINECS no. : 236-293-9
Molecular formula: Cl6W
Molecular weight: 396.558
Melting point: 275 ℃
Other name : niobiumbago (NBB); boranylidyneniobium
CAS no. : 12653-77-9; 12045-19-1
EINECS no. : 234-958-8
Molecular weight: 103.7174.
Melting point: 3050℃
Other name: tantalum boride (1:2)
CAS no. : 12007-35-1
EINECS no. : 234-234-5
Molecular formula: B2Ta.
Molecular weight: 202.572
Performance characteristics: high purity, no impurity phase detected by XRD
Tantalum nitride (TaN) has superior physical, chemical and mechanical properties (such as high hardness, wear resistance, chemical inertness, thermal stability and low resistance temperature coefficient), and is widely used in wear-resistant coatings, film resistors and diffusion barriers in integrated circuits
Other name: Zirconium-2,4-pentanedionate, Zirconium(IV)acetylacetonate; Tetrakis(acetylacetonato)zirconium(IV); 2,4-pentanedione,zrderiv.; acetyl-zirconiuacetonate; nasemuzirconium; orgatixzc150; pentane-2,4-dione-zirconium (4:1);
CAS no. : 17501-44-9
EINECS no. : 241-241-5
Molecular formula: C20H28 Zr O8
Molecular weight: 487.6555.
Melting point: 171-173℃
Nano vanadium dioxide VO2
Other name: Vanadium oxide; Dioxovanadium
Appearance: black powder
Grain size: 50nm, 100nm, 500nm
Purity: 99.9%, 98% ( tungsten mingle )
Ammonium niobium oxalate
English alias: Ethanedioic acid ammonium niobium (5 +) salt , Ammonium niobate (v) oxalate hydrate
CAS no. : 168547-43-1
Molecular formula: C4H4NNbO9
Molecular weight: 302.98 g / mol