{"product_id":"lead-free-pure-knn-powder","title":"Lead-Free Pure KNN Powder","description":"\u003cp\u003eProduct Name Lead-Free Pure KNN Powder Product Overview Lead-Free Pure KNN Powder ((K₀.₅Na₀.₅)NbO₃, abbreviated as KNN) is a perovskite-structured alkali niobate-based precursor powder for lead-free piezoelectric ceramics. KNN is currently one of the most representative lead-free piezoelectric material systems and is regarded as an environmentally friendly candidate to replace traditional lead zirconate titanate (PZT) piezoelectric ceramics. This powder is synthesized by Prof. Yang Zhen's research group using a solid-state reaction route, featuring high crystallinity, uniform morphology, and good dispersibility, making it suitable as a raw material for high-performance lead-free piezoelectric ceramics, textured ceramics, and multilayer piezoelectric devices. Product Features 1. Lead-Free \u0026amp; Eco-Friendly: Free of Pb, Cd, and other toxic heavy metals; complies with RoHS and REACH directives — an ideal replacement for PZT-based materials. 2. High Purity: 3N (≥ 99.9%) purity with low impurity content, significantly improving electrical performance and reliability of sintered ceramics. 3. Sub-Micron Particle Size: Particles \u0026lt; 500 nm offer high sintering activity, enabling dense ceramics at relatively low sintering temperatures. 4. Uniform Morphology: SEM shows regular polyhedral particles with good dispersibility and no obvious agglomeration; suitable for tape casting, slip casting, and other forming processes. 5. Complete Crystal Structure: XRD shows pure perovskite phase without obvious secondary phases (such as K₂Nb₂O₆ or K₄Nb₆O₁₇ pyrochlore). 6. Batch-to-Batch Consistency: Backed by Prof. Yang's group's expertise in batch preparation, the powder exhibits excellent reproducibility and consistency. Application Fields • High-Performance Lead-Free Piezoelectric Ceramics: Used as a precursor for sintering KNN-based ceramics with high d₃₃ and high Tc. • Textured Ceramics: Serves as a matrix powder for templated grain growth (TGG) and reactive templated grain growth (RTGG) processes. • Multilayer Piezoelectric Devices: Used to fabricate multilayer co-fired piezoelectric ceramic chips (MLCC-like actuators), transformers, and sensors. • Transparent Piezoelectric Ceramics: Used for preparing transparent KNN ceramics for optical modulation and piezo-photonic devices. • Ultrasonic Transducers: For high-frequency medical ultrasound probes and nondestructive testing (NDT) probes. • Energy Harvesting: For piezoelectric energy harvesters. • Research Reference Materials: For universities and research institutes conducting fundamental studies on lead-free piezoelectric materials.\u003c\/p\u003e","brand":"xfnano","offers":[{"title":"10g \u003c500nm,3N 111251 \/ Store at room temperature \/ 365days","offer_id":57280579109242,"sku":"111251","price":93.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0907\/3606\/6938\/files\/1_27871cef-ce01-415a-9a0e-d29d5e516d17.png?v=1780024497","url":"https:\/\/chinanano.com\/products\/lead-free-pure-knn-powder","provider":"xfnano","version":"1.0","type":"link"}