Ceramics
Most of the conventional piezoelectric applications require ceramics in simple shapes such as disks, rings and rectangular forms. ENS Piezodevices has in-house dry-pressing, isostatic pressing and lapping-polishing capability to manufacture ceramics in these simple forms to the requirements and dimensions of our customers with fine tolerances.
Additionally, certain underwater applications require ceramics in thin-shell form with spherical, cylindrical, or other novel geometries. ENS team of experts have years of experience to produce ceramics in thin-shell spherical or axisymmetric forms with multimode resonance behaviour, engineered resonance frequency and increased bandwidth operating in a wide frequency range from 20 kHz to 1 MHz.
Fibers
Piezoelectric ceramics in the fiber form are attractive due to their anisotropic properties and increased flexibility. Their main use is in the design and fabrication of compliant and flexible piezocomposite structures with high strain response and high acoustic sensitivity. Piezocomposites with 1-3 connectivity or active fiber composites require full or hollow fiber forms. Piezoceramic fibers are drawn using a novel, composition independent technique developed by ENS Piezodevices Ltd, which allows us to fabricate fibers of any ceramic composition in full and hollow fiber form.
Pb-based Compositions
Lead zirconate titanate (PZT) ceramics are the commercial front-runner piezoelectric materials. However, customized lead-based compositions with higher electromechanical properties offer unique advantages over PZT. ENS Piezodevices have developed several lead-based piezoelectric ceramic compositions which provides better sensor performance for underwater applications
Pb-free Compositions
Lead zirconate titanate (PZT) ceramics are the commercial front-runner piezoelectric materials. However, materials even in electronic equipment are gradually being restricted due to the toxicity of lead. Thus, various lead-free alternative piezoelectric materials are being investigated for transducer applications. ENS Piezodevices Ltd. have expertise in synthesis of lead-free piezoelectric ceramic powders and bulk ceramics in a number of compositions.
Template Particles
Anisometric template particles, i.e. microscale single crystal particles with non-equax morphology are used in the fabrication of crsytallographically textured ceramics as templates. ENS Piezodevices Ltd. have expertise in the synthesis of anisometric template particles in a number of compositions.
Compositions :
- Barium Titanate [BaTiO3]
- Strontium Titanate [SrTiO3]
- Sodium Niobate [NaNbO3]
- Potassium Strontium Niobate [KSr2Nb5O15]
- Bismuth Titanate [Bi4Ti3O12]
- Barium Hexaferrite [BaFe12O19 ]
Textured Ceramics
Polycrystalline ceramics with grains oriented (textured) along special crystallographic directions provide single crystal-like superior performance in certain directions. Textured ceramics are usually fabricated by a combination of templated grain growth and tape casting, but these methods are not suitable for scaling up to mass production. ENS Piezodevices Ltd has developed a novel technique to mass produce textured ceramics in bulk forms.
Compositions :
- Potasium Strontium Niobate [KSr2Nb5O15]
- Potasium Sodium Niobate [(K,Na)NbO3]
- Lead Magnesium Nioobate – Lead Zirconate Titanate [Pb(Mg,Nb)O3 – Pb(Zr,Ti)O3]
