Overview
Capacitor ceramics are advanced functional materials primarily composed of titanates (e.g., barium titanate) or other complex oxides. These ceramics exhibit exceptional dielectric properties, making them indispensable in modern electronics. Their development began in the mid-20th century alongside the miniaturization of electronic components. Unlike conventional ceramics, capacitor ceramics are engineered at the molecular level to achieve precise electrical characteristics. They form the dielectric layer in multilayer ceramic capacitors (MLCCs), which account for approximately 70% of all capacitors used in consumer electronics and industrial systems today.
Physical and Chemical Properties
The performance of capacitor ceramics depends on their crystalline structure and chemical composition. Barium titanate (BaTiO₃), the most common base material, has a perovskite structure that enables high dielectric constants (1,000-20,000). Dopants like strontium or zirconium modify temperature stability. Key parameters include dielectric strength (5-25 kV/mm) and loss tangent (<0.02 at 1 MHz). These materials maintain stability across wide temperature ranges (-55°C to +125°C for X7R formulations). Their thermal expansion coefficients are tailored to match electrode metals, preventing delamination during manufacturing or operation.
Main Applications
In MLCCs, capacitor ceramics enable ultra-thin dielectric layers (<1μm), allowing high capacitance in compact packages. Class I ceramics (e.g., C0G/NP0) serve in precision timing circuits due to their stable properties. Class II/X7R materials dominate decoupling applications in smartphones and IoT devices. High-voltage formulations power electric vehicle charging systems and industrial inverters. Emerging 5G networks utilize low-loss ceramics in RF capacitors for base stations. Specialty compositions with controlled porosity find use in humidity sensors and other advanced electronics.
Safety and Storage
While chemically stable, capacitor ceramic powders require careful handling to prevent respiratory exposure. Facilities should implement local exhaust ventilation during processing. Finished components are non-hazardous but sensitive to mechanical stress. Raw materials must be stored in moisture-proof containers to prevent hydration, which alters dielectric properties. Bulk powders are typically packaged with desiccants. Processed components should be kept in anti-static packaging to prevent electrostatic discharge damage prior to circuit assembly.
B2B Procurement Guide
Industrial buyers should prioritize suppliers with ISO 9001 certification for electronic materials. Key specifications include dielectric constant (±10% tolerance common), breakdown voltage, and temperature coefficient (e.g., X7R indicates ±15% from -55°C to +125°C). For high-reliability applications (automotive, aerospace), request certified test reports for thermal shock resistance and aging characteristics. Consider regional logistics - some formulations may require temperature-controlled transport. MOQ typically starts at 25kg for powders, while pre-formed components are often sold by the thousand pieces.
Related Manufacturers
- 主营：氧化铈、氧化镧、硝酸铈铵、电容器、高纯碳酸铈、硫酸高铈、硫酸铈、大粒径碳酸铈、低氯根碳酸铈、氢氧化铈
- 主营：花生酸、碳酸钠、单氟磷酸钠、电容器、丁基羟基茴香醚、鱼大豆酵母原料
- 主营：环戊酮、甲酸镍、阻燃剂、电容器、草酸镧、钼酸铵、催化剂、钒酸铋、溴氨酸、硝酸锆、碳酸镧、白僵菌、磷酸铁、钨酸酐、氟化镧、视黄醇、叔丁醇、杀螨剂、杀虫剂、醋酸钬、抗粘剂、氟化镥、肟菌酯、氢化钠、氯铂酸、氟化镁
- 主营：PVDF、PTFE、PFA、电容器、SURLYN沙林、EVA、PA6、PA66、PC、PCTG、PEBA、ASA、PTB、PPO、LCP、PCTA、PETG、POM、EAA、特种工程塑料、热塑性弹性体、合金塑料、通用塑料
- 主营：电机轴、磨砂袋、电阻器、陶瓷芯、陶瓷件、机陶瓷、陶瓷轴承、陶瓷马达、陶瓷插芯、陶瓷绝缘件、电容器陶瓷、固定用陶瓷、工业绝缘陶瓷、连接器、纤插芯、三环插芯、零件定制、通信线缆、环氧树脂、保温设计、高压绝缘、严选材料、树脂胶水、激光切割、绝缘耐磨
- 主营：电容器、高铁酸钾
- 主营：陶瓷轮、陶瓷灯头、异形陶瓷、绝缘陶瓷、陶瓷配件、氧化锆陶瓷、陶瓷发热片、氧化铝陶瓷、氧化铝纺织陶瓷、陶瓷管、电热陶瓷、陶瓷分级轮、氧化锆陶瓷棒、氧化锆陶瓷刀片、氧化锆陶瓷件、氧化锆陶瓷轮、氧化铝陶瓷棒、氧化铝陶瓷环、氧化铝绝缘瓷棒
- 主营：磷铁粉、脱模剂、软化剂、陶瓷着色剂、添加剂、增香剂、强还原剂、碳酸氢铵、氯化亚铁、改性涂料、研磨材料、成型助剂、磷酸三辛酯、触变润滑剂、高温防腐粉、高分子助剂、洗涤剂香精、生长调节剂、十六十八醇、染料中间体、乳液稳定剂、油漆稀释剂、表面活性剂、漆雾凝聚剂、硝化纤维稳定剂
- 主营：黄丹粉、除漆剂、红丹粉、电容器陶瓷、除锈剂、脱塑剂、黄血盐钾、无水氟化钾、磷酸三丁酯、硅磷晶、硫氰酸钠
- 主营：氧化铝、镍铁粉、钨铁粉、电容器、白铅粉、氧化硼、锰铁粉、硅铁粉、二氧化锆、氧化钛粉、球形磁粉、雾化铜粉、钒铁粉末、氧化铋粉、钛铁合金、三氧化钼、氧化镁粉、三氧化二、氧化钴粉、耐火材料、二硫化钨、氧化铬绿、纳米氧化钛、纳米氧化锌、球形磁铁粉、四氧化三铁
- 主营：喷涂镍粉、导电镍粉、金属硅粉、陶瓷硅化钽、金属铬粉、金属钨粉、金属锰粉、球形铁粉、球形镍粉、稀有硒粉
- 主营：氧化铝、二氧化钛、纳米ATO、电容器、纳米ITO、介孔二氧化硅、四氧化三铁、二氧化锆、纳米碳化硅、二氧化硅、三氧化二铁、隔热材料、导电抗静电材料、导热材料、氮化铝、氧化镁、氢氧化镁、氧化锌
- 主营：葡辛胺、添加剂、抗氧剂、电容器、生化试剂、抗氧化剂、富马酸钠、合成中间体、表面活性剂、乙基苄基氯、化工中间体、合成材料助剂、溴化四苯基膦、亚硫酸乙烯酯、邻苯二甲酸铵、紫外线吸收剂、环己基苯基甲酮、羧甲基纤维素钠
- 主营：全羟基、二维红外材料、MBene、高性能氧化锆陶瓷、高性能氧化镁陶瓷、高导热氮化铝陶瓷、高精密陶瓷加工、高性能氧化铝陶瓷、PBN和热压氮化硼陶瓷、特殊氧化钙陶瓷、MXene、黑磷、生物材料定制
- 主营：隔热粉、氧化铝粉、隔热浆料、氧化锆陶瓷、超细磁粉、磁性液体、纳米磁粉、电池材料、二氧化硅、合金材料、电子涂层、纳米银粉、涂料油漆粉、透明氧化铝、水性分散液、纳米氧化镧、纳米氧化铁、纳米氧化铝、纳米氢氧化铝、纳米氧化镁、纳米氧化锌