Jacky.Wang

Time,I think people usually use a kind of concept to calculate the physical or chemical process.Then time was found by people.But think that is time existed?No,I think he just a kind of concept,but not a object,such as distance.We always said 1m,2m,but you can not found that in fact you have found a object to describe the distance.Time is the same,time is just a concept,but not a object.So it is hard to describe what time is but you can found them here because you always can found a object to describe time.Such as mind in your brain,you can touch mind?

I am a sales of Alnico factory in China,these days ,a customer visited us,they manufacture microphone,they want to purchase some Alnico magnets used in their microphone. I think about it,that why Alnico can make the voice better than other magnets,such as Neodymium.If anyone can give me your opinion I will appreciate. As I know that Neodymium's magnetic values are stronger than Alnico.and do their work temperature is just lower than 150-200C.and Alnico really have best stable magentic performance and temperature stability,but Microphone will not change a lot on temperature as I think.So what made Alnico better than Neodymium on performance of microphone. Thanks

First of all,I need to explain the Neodymium magnets to you,this kind of magnet should be the strongest magnets now.And there are many grades too ,of this kind of magnets.Its character is that they can not work over 200℃,and do they will lose the magnetism as the time over,for the outer magnetic field.And another bad news of this magnet,they can not be magnetized again easily when they lose their magnetism.As I know Neodymium magnets were manufactured by Cast or Sintered.This kind alloy can be magnetized in the special environment.Of course,I just know little of Neodymium,but I know little more about another magnets Alnico.