How to cut and resize a piezoceramic sheet ?
Several cutting devices may be used to cut piezoceramics. A razor blade may be used to a piezoceramic sheet. However, the cut sheet using razor blade will not have straight sides. If you want a nicely cut sheet of piezoceramics, use a special diamond saw.
How to bond a piezoceramic sheet to another object ?
In attaching a piezoceramic sheet to an object, epoxy and cyanoacrylate may be used. However, this combination might not always be effective in all instances. In order to know the right adhesives to use for your specific needs, contact us at Beijing Ultrasonic. Let us know the material of the object to which you will attach the piezoceramic sheet. Tell us also the temperature that will be involved in application.
Can super glue be used to attach piezoceramic sheets to an object ?
Super glue may be used if the needed attachment is not permanent. The positive side of using super glue is that an electric contact happens almost instantly in the bond. Also, although the bond is temporary, it can also last for a long time, depending on several factors. The bond can even last for several years. When the bond is new, the quality of the bond is comparable to that of the bond created by high quality adhesives.
Do piezoceramic sheets break easily ?
Piezoceramic sheets are fragile and they break easily. In handling a single piezoceramic sheet, utmost care should be taken. If the sheet is dropped, it will most likely break. If two sheets of piezoceramics are attached to each other, of course the resulting sheet is stronger. It might not break when it is dropped.
How can electrical contact be made on the bonded side of a piezoceramic sheet ?
Several methods are available to make an electrical contact to the bonded side of a piezo sheet. Usually, the method used is connecting the piezoelectric sheet and a metal substrate using a conductive bond. When the conductive bond is done, two electrical leads are attached to the object. One lead is bonded to the metal substrate while the other is bonded to the outer side of the piezo sheet. Sometimes a conductive bond cannot be done. This usually happens when the substrate is made of plastic or glass. In this situation, a wire is used. The wire is attached to the inner side of the piezoceramic sheet. Then, an overhang or cutout is attached so the wire will have a space when the substrate and piezoelectric sheet are bonded together.
How to bond piezoceramics and lead wire
Connecting piezoceramics and lead wire can be easily done. That is because PSI piezoceramics already have a metallic electrode attached to them. The lead wire can be easily bonded to the electrode. To get the same results for all attachments of lead wire, a liquid flux is usually needed. To make this easier for you, you may avail one of our solder kits.
Accessing the center shim
The center shim may be accessed by supporting the bottom of the bender and then making very small passes with the use of a milling machine. This is done for the fast removal of ceramic material and for the easy access to the center shim. To make the removal of the shim easier, water may be used as a lubricant.
How to properly hook a bender
Hooking up a bender can be done in two ways. The proper way depends on the polarization of the piezoceramic sheets. If the polarization is for series operation, the proper way of hooking a bender is by connecting a wire to the bender’s electrodes situated at the exterior part of the piezoceramic sheets. If the polarization is for parallel operation, a single lead is formed by connecting all the electrodes. Then, to make another lead, the center shim is bonded with a wire.
Proper removal of electrodes
There are many ways to remove electrodes. Among the options are sandblasting, using laser, and etching.
What is the maximum level of strain that a piezoceramic sheet can take ?
A piezoceramic sheet may be stretched, but only up to a certain extent. In general, the maximum level of strain that a piezoceramic sheet can take is 500 microstrain. A higher strain level may be obtained. However, proper caution should be taken in order to prevent damaging the sheet.
What is the maximum strain level that a bender can take ?
A cantilevered bender can be bent up to a certain level. In general, the bending can be done up to a level that is a little over the half of the length of the unsupported bender.
Can a piezoceramic sheet be repoled when some of its properties are lost ?
There are times when piezoceramic sheets lose some of their properties. When this happens, the sheets can be repoled to regain all polarization that was lost. The amount of electric field needed to regain polarization depends on the type of piezoceramic sheet.