Pure tantalum beads are one of the most important products of tantalum products. Tantalum is a metal element with atomic number 73 and the chemical symbol Ta. The element corresponding to the element is steel gray metal, which has extremely high corrosion resistance. It is resistant to hydrochloric acid, concentrated nitric acid and king Water does not react. Tantalum mainly exists in tantalite and coexists with niobium. Tantalum is moderately hard [1] and ductile, and can be drawn into filaments to make thin foils. Its coefficient of thermal expansion is small. Tantalum has very good chemical properties and is extremely resistant to corrosion. It can be used to make evaporation vessels, etc., and can also be used as electrodes, rectifiers, and electrolytic capacitors of electron tubes. Medically, it is used to make thin sheets or threads to repair damaged tissues. Although tantalum is highly resistant to corrosion, its corrosion resistance is due to the formation of a stable protective film of tantalum pentoxide (Ta2O5) on the surface. Tantalum mainly exists in tantalite and coexists with niobium. Good tantalum beads.

Tantalum Bead (Tantalum ) is also corroded by phosphoric acid at high temperatures, but the reaction generally occurs above 150°C. After soaking in 85% phosphoric acid at 250°C for 1 year, the surface is corroded by 20 mm. In addition, tantalum is corroded by hydrofluoric acid and nitric acid. It can be quickly dissolved in the mixed acid, and can also be dissolved in hydrofluoric acid. But tantalum is more afraid of strong alkali. In 40% caustic soda solution at 110°C, tantalum will be dissolved quickly, and in potassium hydroxide solution with the same concentration, it will be dissolved quickly at 100°C. In addition to the above, general inorganic salts generally cannot corrode tantalum below 150 °C. Experiments have proved that tantalum has no effect on alkali solution, chlorine gas, bromine water, dilute sulfuric acid and many other agents at room temperature, but it will react under the action of hydrofluoric acid and hot concentrated sulfuric acid. Such cases are relatively rare in metals. The Good tantalum beads Tantalum and niobium have similar physical and chemical properties.

The characteristics of tantalum make its application field very broad. In the equipment for preparing various inorganic acids, tantalum can be used to replace stainless steel, and the service life can be dozens of times longer than stainless steel. In addition, in chemical, electronic, electrical and other industries, tantalum can replace the tasks that used to be undertaken by the precious metal platinum, greatly reducing the required cost. Tantalum is made into capacitors and equipped in military equipment. The military industry in the United States is extremely developed, and it is the world's largest arms exporter. Half of the world's tantalum metal production is used in the production of tantalum capacitors. The U.S. Department of Defense Logistics Agency is a relatively large owner of tantalum metal, and once bought out one-third of the world's tantalum powder.

1. Feature of high purity pure tantalum beads

1) Good ductility and toughness

2) Low coefficient of thermal expansion

3) Good corrosion resistance

2. Chemical Composition

Chemical Composition % max
Grade	Fe	Si	Ni	W	Mo
R05200	0.005	0.005	0.005	0.005	0.002
R05400	0.005	0.005	0.005	0.005	0.002
Grade	Nb	O	C	H	N
R05200	0.005	0.02	0.004	0.002	0.005
R05400	0.1	0.03	0.1	0.002	0.1

3. Mechanical Property

Mechanical Property

Grade

Ultimate tensile strength,

min, pound / inch2 ( MPa )

Yield strength, min,

pound / inch2 (MPa)

Elongation, min, %

1 inch (25.4mm), gauge length

R05400 R05200

R05252

R05255

R05240

25000 (172)

40000 (276)

70000 (482)

40000 (276)

15000 (103)

28000 (193)

55000 (379)

28000 (193)

4. Demeter Tolerance

Diameter/mm	Tolerance/mm
0.2---2.00	±0.005
2.00---4.00	±0.005
4.00---6.00	±0.005
6.00---8.00	±0.005
8.00---10.00	±0.005
10.00---12.00	±0.005
12.00---14.00	±0.005
14.00---16.00	±0.005
16.00---18.00	±0.005
18.00---20.00	±0.005