广东快乐十分开奖结果

Toll free:+86-400 882 8982 中文 ENG

Ta

Tantalum is a chemical element with the symbol Ta and atomic number 73. A rare, hard, blue-gray, lustrous, transition metal, tantalum is highly corrosion-resistant and occurs naturally in the mineral tantalite.

Tantalum is dark, dense, ductile, very hard, easily fabricated, and highly conductive of heat and electricity. The metal is renowned for its resistance to corrosion by acids; in fact, at temperatures below 150 °C tantalum is almost completely immune to attack by the normally aggressive aqua regia. It can be dissolved with hydrofluoric acid or acidic solutions containing the fluoride ion and sulfur trioxide, as well as with a solution of potassium hydroxide. Tantalum's high melting point of 3017 °C (boiling point 5458 °C) is exceeded only by tungsten and rhenium for metals, and carbon.

TECHNICAL DATA
SymbolTaDensity (20°C)/gcm-316.65
Atomic number73Melting point /°C2980
No. of naturally occurring isotopes2Boiling point /°C5534
Atomic weight180.9479ΔHfus/kJmol-124.7
Electronic configuration[Xe]4f145d36s2ΔHvap/kJmol-1758.2
Metal radius(12-coordinate)/pm146ΔHf(monoatomic gas)/kJmol-1782(+/-6)
Ionic radius(6-coordinate)/pm V64Electrical resistivity
Ionic radius(6-coordinate)/pm IV68(20°C)/μohm cm-12.4
Ionic radius(6-coordinate)/pm III72Electronegativity χ1.5
EVAPORATION TECHNIQUES
Temperature (oC) @Vap. PressureTechniquesRemarks
10-8 Torr10-6 Torr10-4 TorrElectron BeamCrucibleCoilBoat
196022402590Excellent---Forms good films




Ta
Sputtering Targets
Matierial SymbolAtomic Number     Thermal Conductivity         Theoretical Density 
W/m.K           g/cc
Tantalum_TaTa735716.6
Evaporation Materials
Matierial SymbolAtomic Number     Thermal Conductivity         Theoretical Density 
W/m.Kg/cc
Ta ( pellets )Ta735716.6


Below is the periodic table of chemical elements.The elements in red are the ones Nexteck's product contain. Click them, you will come to the details.

24-hour hotline:+86-400 882 8982

logo.png

Providing real-time and high quality service

NEXTECK (CHINA) - SHENZHEN
Tower A1001, Galaxy Century, No 3069, CaiTian Rd, Futian District, Shenzhen, China
Zip Code: 518026
Tel: +86-755-8256-1631
Fax:+86-755-8256-1691
E-mail:nexteck@chinajddz.com
Hotline:+86-400 882 8982

PRODUCTION PLANT
Wenchuan Rd, Alley 5300/1, Baoshan District, Shanghai, China
Zip Code: 200942
Tel: +86-21-3638-0189
Fax: +86-21-3638-0109
E-mail: nexteck@chinajddz.com.cn
广东快乐十分开奖结果

云南快乐十分 陕西快乐十分 河南快3 陕西快乐十分 广东快乐十分 福建快3开奖 河南快3走势图 河南快3 云南快乐十分走势图 河南快3