# Enhanced transfer efficiency of ultrasonic motors with polyimide based frictional materials and surface texture

> Research article (Sensors and Actuators A Physical, 2019) · cited 23× · AI/ML

**Wikidata**: [openalex:W2950481930](https://www.wikidata.org/wiki/openalex:W2950481930)  
**Source**: https://4ort.xyz/entity/enhanced-transfer-efficiency-of-ultrasonic-motors-with-polyimide-based-frictional-materials-and-surface-texture