Effect of MgO and PVA on the Synthesis and Properties of Negative Thermal Expansion Ceramics of Zr2(WO4)(PO4)2. Issue 5 (27th June 2012)

• Record Type: Journal Article
• Authors: Shang, Rui; Hu, Qinglun; Liu, Xiansheng; Liang, Erjun; Yuan, Bin; Chao, Mingju
• Is Part Of: International journal of applied ceramic technology. Volume 10:Issue 5(2013:Sep./Oct.)
• Page Start: 849
• Page End: 856
• Publication Date: 2012-06-27
• Subjects: Ceramics -- Periodicals; Ceramics -- Technological innovations -- Periodicals; 620.1405
• DOI: 10.1111/j.1744-7402.2012.02787.x
• Languages: English
• ISSNs: 1546-542X

Abstract

<abstract abstract-type="main" id="ijac02787-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p>A green synthesis of Zr₂(WO₄)(PO₄)₂ ceramics from ZrO₂, WO₃ and P₂O₅ is presented. It is shown that the ceramics can be synthesized by one‐step sintering within 60 min. The relative density of the ceramics can be enhanced from about 75% without sintering additives to 99.8% of the theoretical value with 1.0 wt% MgO and 2.0 wt% polyvinyl alcohol. The grain sizes of the ceramics are smaller and more uniform with MgO added in the raw materials than with MgO added in the Zr₂(WO₄)(PO₄)₂ powder. The coefficients of thermal expansion are about −2.325 × 10⁻⁶, −1.406 × 10⁻⁶, −1.509 × 10⁻⁶ and −1.384 × 10⁻⁶°C⁻¹ for the samples without MgO, with MgO added in the raw materials, with MgO added in the Zr₂(WO₄)(PO₄)₂ powder and with MgO and PVA added in the raw materials, respectively.</p> </abstract>