Zn1.1Ga1.8Ge0.1O4透明陶瓷烧结过程的动力学研究

摘要/Abstract

摘要： 尖晶石型Zn_1.1Ga_1.8Ge_0.1O₄是优秀的介电和长余辉基体材料,透明陶瓷的制备有望扩大其应用领域。本文对Zn_1.1Ga_1.8Ge_0.1O₄陶瓷的无压烧结动力学进行研究,结果表明Zn_1.1Ga_1.8Ge_0.1O₄陶瓷烧结过程的致密化和晶粒生长均由O^2-晶界扩散控制,其烧结中期的致密化活化能为(426±35) kJ/mol,烧结末期的晶粒生长活化能为(439±14) kJ/mol。通过将烧结工艺参数控制在“烧结窗口”中,获得了良好的无压烧结体显微结构。经过高温热等静压处理后得到Zn_1.1Ga_1.8Ge_0.1O₄透明陶瓷,其光学透过范围为0.3~9 μm,在2.5 μm处直线透过率达到81.2%。

关键词: Zn_1.1Ga_1.8Ge_0.1O₄尖晶石, 透明陶瓷, 烧结路径, 致密化活化能, 晶粒生长活化能, 光学透明性

Abstract: Spinel-type Zn_1.1Ga_1.8Ge_0.1O₄ is an excellent host material for dielectric and long-persistent luminescent ceramics. It is helpful to expand application when the transparent ceramics is fabricated. In this paper, the pressureless sintering kinetics of Zn_1.1Ga_1.8Ge_0.1O₄ ceramics were studied. The results show that both densification and grain growth are controlled by the grain boundary diffusion of O^2-. The activation energy for densification in the intermediate sintering stage is determined as (426±35) kJ/mol, while the activation energy for grain growth in the final sintering stage is calculated as (439±14) kJ/mol. When the combination of sintering parameters is optimized to enter into the so-called “sintering window”, the favorable microstructure of the pressureless-sintered body is obtained. After hot isostatic pressed at high temperature, Zn_1.1Ga_1.8Ge_0.1O₄ transparent ceramics with optical transmission ranging from 0.3 μm to 9 μm and in-line transmittance of 81.2% at 2.5 μm are prepared.

Key words: Zn_1.1Ga_1.8Ge_0.1O₄ spinel, transparent ceramics, sintering path, densification activation energy, grain growth activation energy, optical transparency

中图分类号:

O734

汪开强, 杨康, 靖正阳, 陈博文, 涂兵田, 王皓. Zn_1.1Ga_1.8Ge_0.1O₄透明陶瓷烧结过程的动力学研究[J]. 人工晶体学报, 2024, 53(11): 1972-1980.

WANG Kaiqiang, YANG Kang, JING Zhengyang, CHEN Bowen, TU Bingtian, WANG Hao. Kinetic Study on the Sintering Process of Zn_1.1Ga_1.8Ge_0.1O₄ Transparent Ceramics[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2024, 53(11): 1972-1980.

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Zn_1.1Ga_1.8Ge_0.1O₄透明陶瓷烧结过程的动力学研究

Kinetic Study on the Sintering Process of Zn_1.1Ga_1.8Ge_0.1O₄ Transparent Ceramics

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