Scholarlink

<p>The Ti<sub>3</sub>AlC<sub>2</sub> MAX phase exhibits excellent properties such as high electrical conductivity, toughness, and machinability. In this work, Ti<sub>3</sub>AlC<sub>2</sub> MAX phase was synthesized via spark plasma sintering (SPS) with a high purity of ~ 97.9% under optimized conditions (1Ti: 1.2Al: 2TiC, 1322&#xa0;°C, 7&#xa0;min). Systematic optimization revealed that aluminum content strongly influences phase purity, while excessive temperature (&gt; 1352&#xa0;°C) or prolonged holding time (&gt; 12&#xa0;min) reduces MAX formation. The synthesized MAX phase was selectively etched with hydrofluoric acid to obtain Ti<sub>3</sub>C<sub>2</sub> MXene, and the influence of etching duration was investigated. Structural analyses confirmed the layered MXene morphology, while prolonged etching (&gt; 6&#xa0;h) led to interlayer collapse, reducing the c/a ratio (from 8.6 to 7.1) and interlayer spacing (from 39 to 14&#xa0;nm). The electrical conductivity and electromagnetic properties of Ti<sub>3</sub>C<sub>2</sub> MXene were examined in the X-band (8–12&#xa0;GHz). A 40 wt.% MXene–paraffin composite (3&#xa0;mm thick, 12&#xa0;h etching) had a maximum reflection loss of about − 15&#xa0;dB at 9&#xa0;GHz. The best absorption was seen in the 40–60 wt.% loading range. These findings demonstrate that Ti<sub>3</sub>C<sub>2</sub> MXene synthesized under controlled SPS and etching conditions exhibits high electrical conductivity and strong microwave absorption, highlighting its potential as an efficient candidate for next-generation electromagnetic wave absorbers.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Synthesis of Ti3C2 MXene using Ti3AlC2 MAX phase and investigation of the effect of processing parameters on its physical properties

  • 期刊论文

  • 发表日期：

    2026年5月13日

查看全文
  • Mojtaba Gharaghani,
  • Seyyed Salman Seyyed Afghahi,
  • Morteza Beyranvand

摘要

The Ti3AlC2 MAX phase exhibits excellent properties such as high electrical conductivity, toughness, and machinability. In this work, Ti3AlC2 MAX phase was synthesized via spark plasma sintering (SPS) with a high purity of ~ 97.9% under optimized conditions (1Ti: 1.2Al: 2TiC, 1322 °C, 7 min). Systematic optimization revealed that aluminum content strongly influences phase purity, while excessive temperature (> 1352 °C) or prolonged holding time (> 12 min) reduces MAX formation. The synthesized MAX phase was selectively etched with hydrofluoric acid to obtain Ti3C2 MXene, and the influence of etching duration was investigated. Structural analyses confirmed the layered MXene morphology, while prolonged etching (> 6 h) led to interlayer collapse, reducing the c/a ratio (from 8.6 to 7.1) and interlayer spacing (from 39 to 14 nm). The electrical conductivity and electromagnetic properties of Ti3C2 MXene were examined in the X-band (8–12 GHz). A 40 wt.% MXene–paraffin composite (3 mm thick, 12 h etching) had a maximum reflection loss of about − 15 dB at 9 GHz. The best absorption was seen in the 40–60 wt.% loading range. These findings demonstrate that Ti3C2 MXene synthesized under controlled SPS and etching conditions exhibits high electrical conductivity and strong microwave absorption, highlighting its potential as an efficient candidate for next-generation electromagnetic wave absorbers.