Xingtai government procurement center network equipment, LED full color electronic screen...

Title: Xingtai Government Procurement Center Network Equipment, LED Full Color Electronic Screen Tender Notice Tender No.: XTGP2009—07 Announcement Date: March 3, 2009 Deadline: March 12, 2009 Tendering Agency: Province: Hebei Province - Content of Xingtai City: The Xingtai City Government Procurement Center is entrusted by the purchaser to conduct open bidding and procurement of its network equipment. Suppliers who have passed the qualification examination are welcome to participate in this bidding activity.
I. Project content: network equipment, LED full color electronic screen II, bidding document number: XTGP2009-07
III. Time for receiving bidding documents: February 27 to March 3, 2009 4. Collection of bidding documents Location: No. 281, Guoshoujing North Road, Xingtai City (Room 415, Xingtai City Finance Bureau)
V. The cost of the bidding documents: 100 yuan; not mailed.
6. Deadline for bid submission: 7:00, March 12, 2009, Bid Opening Time: March 12, 2009 VIII. Bid Opening Location: Xingtai City Administrative Service Hall Nine, Contact: Xingtai City Government Procurement Center Company Name: Xingtai City Government Contact person of purchasing center: Sun Shaode, Zhang Shuangjie Tel: 0319-2210175 2589702 E-mail: Fax: Postal code: 054000 Address: No. 281, Guoshoujing North Road, Xingtai City

Ferrite Driver Unit

Why do you like to use ferrite magnets? Because it does not rust, does not oxidize, does not corrode and is absolutely environmentally friendly.
Why don't ferrite magnets rust?
The chemical name of ferrite magnet is iron tetroxide. The main components are: Fe3O4. It is already an oxide of iron, so it is very difficult to be oxidized again. Other magnets (the main component is iron) are made of magnetized metal iron or other elements. Like other iron and steel, they can be oxidized and rusted, and the oxidized part will lose their magnetism.
What are the advantages (advantages) of ferrite magnets
1. Low cost, low price. Raw material cost is cheap.
2. Good temperature stability. It can be used in temperatures of -40 degrees Celsius and +350 degrees Celsius.
3. It is just mentioned that it does not rust.
4. The demagnetization curve is approximately a straight line.
5. Light weight, density is (4.6-5.1) X103kg/M3
6. The anisotropy constant of the magnetic crystal is large.
7. Large coercivity Hc (between AlNiCo alloy material and rare earth cobalt permanent magnet material)
8. High resistivity.

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