Text this: Dielectric, ferroelectric and piezoelectric properties of (Ba<inf>0.7</inf>Ca<inf>0.3</inf>)Ti<inf>1-x</inf>Cu<inf>x</inf>O<inf>3-x</inf>ceramics

 _    _      ___    __    __    _____     ______  
| \  / ||   / _ \\  \ \\ / //  |  ___||  /_   _// 
|  \/  ||  | / \ ||  \ \/ //   | ||__      | ||   
| .  . ||  | \_/ ||   \  //    | ||__     _| ||   
|_|\/|_||   \___//     \//     |_____||  /__//    
`-`  `-`    `---`       `      `-----`   `--`