Influences of TiO2 Addition on the Crystallization Behavior, Microstructure, and Magnetic Properties of Li2O-MnO2-Fe2O _{详细信息    查看全文}

• 作者：Huy-Zu Cheng ; Huey-Jiuan Lin ; Moo-Chin Wang…
• 刊名：Metallurgical and Materials Transactions A
• 出版年：2015
• 出版时间：May 2015
• 年：2015
• 卷：46
• 期：5
• 页码：2040-2050
• 全文大小：1,675 KB
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• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Materials Science
  Metallic Materials
  Structural Materials
  Physical Chemistry
  Ceramics,Glass,Composites,Natural Materials
  
• 出版者：Springer Boston
• ISSN：1543-1940

文摘

Influences of TiO2 addition on the phase transformation, microstructure, and magnetic properties of Li2O-MnO2-Fe2O3-CaO-P2O5-SiO2 (LMFCPS) glass have been studied using DTA, XRD, SEM, EDS, TEM, SAED, and SQUID. When LMFCPS glass, with and without TiO2 content, is crystallized at 1123?K (850?°C) for 2?hours, the magnetite (FeFe2O4), β-wollastonite (β-CaSiO3), lithium orthophosphate (Li3PO4), and triphylite (Li(Mn0.5Fe0.5)PO4) phases are formed. The β-wollastonite and lithium silicate formed with evident directionality were observed in the LMFCPS glass–ceramics without adding TiO2. However, when the LMFCPS glass with various TiO2 content is crystallized at 1123?K (850?°C) for 16?hours, very small remnant magnetic induction and coercive field hysteresis loops were found showing the ferromagnetic property in a magnetic field smaller than 2000?Oe. Additionally, when LMFCPS glass with various TiO2 contents is crystallized at 1123?K (850?°C) for 16?hours, the glass–ceramics showed super-paramagnetic property in a magnetic field of 60?kOe due to the small grains of the iron-rich phases.