Moderate price and equally moderate magnetic strength are the twin features of Ceramic Ferrite magnet. Both factors combined together have placed this magnet as the key bastion on which tons of magnetic jewellery is made globally.
Ceramic Ferrite is simply mixture of ceramic clay along with Iron powder and either of Barium Carbonate or Strontium Carbonate. In this blog I am talking about Ceramic Ferrite made with Barium Carbonate as a constituent alloy. Let me explain my point of view. Although the typology Ceramic Ferrite is used to refer to either of these two elements Barium or Strontium it would be better if we restrict Ceramic Ferrite to Barium Carbonate mixture only. The technical script for this Barium mixed magnet is given as Ba Fe 12 O19. Here are salient points of Ceramic Ferrite mixed with Barium for your reading:
1. Ceramic Ferrite is easily manufactured in various sizes and forms: round, square, rectangle, arc, triangle, horseshoe and much more. It can be subjected to multi type production processes including sintering, pressing and injection moulding. In gem & jewellery industry sintered one is very popular. Historically sintered Ceramic Ferrite was the precursor of modern magnets as it was introduced in 1960s as cheap and convenient alternative to metallic magnets that were too heavy.
2. This type of magnet is sought after by the gem & jewellery industry to mount magnets of different sizes and shapes. Widely used in several types of jewellery wear including bracelet, wrist band and wraps Ceramic Ferrite snugs in even minute jewellery.
3. Though the magnet has hardness of 7 at Mohs scale in its favour it is very brittle. As a result its mechanical strength is low. Never the less this does not create snags while fabricating magnetic jewellery.
4. Ceramic Ferrite has excellent anti-corrosion resistance. Therefore, no coating or plating is required.
5. As Ceramic Ferrite has lowest magnetic flux density among the type of magnets its use is fairly restricted to magnetic jewellery where the required Gauss strength averages around 1,500 Gauss.
6. It does not lose magnetism over the years and considered as the most popular permanent magnet sold at an affordable price. Moreover, it has fairly higher resistance to external magnetizing fields. This we call as Coercive Magnetic Field Strength. Ceramic Ferrite is ranked third after Neo magnets and Samarium Cobalt in this regard. At the time of production the resistance to external magnetizing capability can be tweaked to soft ferrite or hard ferrite. Soft Ferrite has relatively lesser Coercive magnetic field strength than hard ferrite. If you walk through highly magnetised environment your magnetic jewellery made of Ceramic Ferrite might suffer loss of magnetism depending on whether it is soft or hard ferrite and the level of ambient magnetic force surrounding you.
7. This magnet variety has higher operating temperature capability. Maximum operating temperature of 300 degree Celsius means Ceramic Ferrite can be easily fixed in various types of jewellery. However, at operating temperature of 460 degree Celsius it would lose magnetic strength altogether.
8. When you use Ceramic Ferrite you get positive cosmics in the form of balancing between and amongst competing forces within you. Outside this magnet can place you in a stronger position to resist pressure and deflect negative energy. As a cautionary remark I must say, selecting Ceramic Ferrite dictates that you do a thorough assessment of your personal cosmics and then decide what type of magnetic wear you should choose and the relative magnetic strength.
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