文章信息/Info

Title:

Thermal, chemical properties of zirconia(ZrO₂) and their applications

作者:

歐陽靜; 周正; 倫惠林; 謝亞玲; 楊華明

中南大學(xué)資源加工與生物工程學(xué)院無機材料系

Author(s):

OUYANG Jing;  ZHOU Zheng;  LUN Huilin;  XIE Yalin;  YANG Hua-min

Department of Inorganic Materials, School of Minerals Processing & Bioengineering

關(guān)鍵詞:

熱導(dǎo)率; 熱障涂層; 化學(xué)穩(wěn)定性; 表面能; 化學(xué)酸位

DOI:

10.7502/j.issn.1674-3962.2014.06.08

文獻標志碼:

A

摘要:

本部分重點分析了ZrO₂的熱性質(zhì)、化學(xué)穩(wěn)定性和其理論基礎(chǔ)。ZrO₂的導(dǎo)熱系數(shù)極低是其可用于熱障涂層的基本原理，分析了熱障涂層的結(jié)構(gòu)和制備方法，說明了ZrO₂作為熱障涂層材料的優(yōu)異特性。分析了ZrO₂的表面能與表面酸性強度，表面酸位來源、固體超強酸的原理、性質(zhì)、制備方法和應(yīng)用領(lǐng)域。ZrO₂基催化材料分類為純ZrO₂催化劑、負載型催化劑和復(fù)合型催化劑，ZrO₂的化學(xué)穩(wěn)定性好是其作為催化劑材料基體的根本原因。列舉了ZrO₂基固體超強酸的反應(yīng)方程式，ZrO₂復(fù)合型催化劑具有更好的催化性能，詳述了以CeO₂-ZrO₂固溶體作為三效催化劑的機理和進展。相關(guān)方法和原理可為ZrO₂的熱學(xué)性質(zhì)研究提供系統(tǒng)的理論知識，將有助于理解和應(yīng)用ZrO₂的催化原理和表面性質(zhì)，并提供系統(tǒng)的相關(guān)知識。

Abstract:

We reviewed in this part the thermal properties, chemical stability and their mechanism. The ultra-low thermal conducting coefficient of ZrO₂ is the key for its application in thermal barrier coatings, the structure and synthesis methodology were introduced, and excellencies of ZrO₂ based thermal barrier coatings were described. The surface energy, acidic positions and their originations in ZrO₂, the principle, nature, method of preparation and application areas of ZrO₂ based super-acids were analyzed. ZrO₂ based catalysts can be catalogued into pure ZrO₂, loaded and composite ones, respectively. The fairly good chemical stability of ZrO₂ is the basic for catalytic application. Some typical catalytic reactions were also listed, elaborating that the composites-based ZrO₂ has better catalytic performance. Mechanisms and applications of CeO₂-ZrO₂ solid solutions as three way catalysts were also introduced. This review provides the systematic knowledge of thermal and catalytic applications of ZrO₂, which can help understanding their mechanisms and surface properties.