Synthesis, structure and ferroelectric property of a new niobate: Sr6CrNb9O30

✍ Scribed by Fang Liang; Zhang Hui; Wu Bolin; Yuan Runzhang

• Book ID: 104365062
• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 348 KB
• Volume: 40
• Category: Article
• ISSN: 0960-8974
• DOI: 10.1016/s0960-8974(00)00037-1

✦ Synopsis

A new niobate Sr6CrNbgO30 was found in the ternary system SrO-Cr203-Nb205, The transparent crystal which has a green color and a need-like shape can be grown by the flux method. The crystal structure was determined by x-ray diffraction analysis and dielectric measurement, and it belongs to the orthorhombic tungsten bronze structure at room temperature with space group Cram2, and unit cell parameters a=1.7505(4) nm, b=1.7510(1) nm, c=7.768(4)nm, Z=4. Dielectric constant measurement show that SreCrNbgO3~ has two phase transitions, paraelectric to ferroelectric at l l0°C and ferroelectric to ferroelastic at 205 °C.