用纳米氧化钨对多孔莫来石陶瓷进行改性

Porous Mullite Ceramic Modification with Nano-WO.

作者信息

Mahnicka-Goremikina Ludmila, Svinka Ruta, Svinka Visvaldis, Goremikins Vadims, Ilic Svetlana, Grase Liga, Juhnevica Inna, Rundans Maris, Eiduks Toms Valdemars, Pludons Arturs

机构信息

Institute of Materials and Surface Engineering, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Paula Valdena st. 3/7, LV-1048 Riga, Latvia.

Institute of Structural Engineering and Reconstruction, Riga Technical University, Kipsalas st. 6A, LV-1048 Riga, Latvia.

出版信息

Materials (Basel). 2023 Jun 27;16(13):4631. doi: 10.3390/ma16134631.

DOI:10.3390/ma16134631

PMID:37444944

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10342710/

Abstract

Mullite and mullite-alumina ceramics materials with dominance of the mullite phase are used in different areas of technology and materials science. Porous mullite ceramics materials can be used simultaneously as refractory heat insulators and also as materials for constructional elements. The purpose of this work was to investigate the WO nanoparticle influence on the evolution of the aluminum tungstate and zircon crystalline phases in mullite ceramics due to stabilization effects caused by different microsize ZrO and WO. The use of nano-WO prevented the dissociation of zircon in the ceramic samples with magnesia-stabilized zirconia (MSZ), increased porosity by approximately 60 ± 1%, increased the intensity of the aluminum tungstate phase, decreased bulk density by approximately 1.32 ± 0.01 g/cm, and increased thermal shock resistance by ensuring a loss of less than 5% of the elastic modulus after 10 cycles of thermal shock.

摘要

以莫来石相为主导的莫来石和莫来石-氧化铝陶瓷材料被应用于技术和材料科学的不同领域。多孔莫来石陶瓷材料既可以用作耐火隔热材料，也可以用作结构元件材料。这项工作的目的是研究WO纳米颗粒对莫来石陶瓷中钨酸铝和锆晶相演变的影响，这是由于不同微尺寸的ZrO和WO所产生的稳定作用。使用纳米WO可防止在含有氧化镁稳定氧化锆（MSZ）的陶瓷样品中锆的解离，使孔隙率增加约60±1%，提高钨酸铝相的强度，使堆积密度降低约1.32±0.01 g/cm³，并通过确保在10次热震循环后弹性模量损失小于5%来提高热震抗性。