{"title":"Flash-induced chemical reaction: Conversion of a sulphide into oxide and its densification in <10 s","authors":"Pranav Rai, Devinder Yadav","doi":"10.1016/j.matlet.2024.137747","DOIUrl":null,"url":null,"abstract":"<div><div>The present work shows that the rate of a chemical reaction can be enhanced by application of electric field and the reaction temperature can be lowered significantly. Roasting is a metallurgical process where metal sulphides transform into metal oxide when heated in presence of air. Conventional roasting of zinc sulphide (ZnS) requires high temperatures (>800 °C) and is a sluggish process. Field-induced roasting and densification occurred together at a furnace temperature as low as 650 °C in <10 s. Interrupted experiments in stage III of flash showed that cubic ZnS first transformed to hexagonal ZnS at ∼ 844 °C (which appears above 1020 °C) before transforming to ZnO. The hexagonal phase was retained at room temperature only if the flash was turned off in <5 s. This study introduces a new method for speeding up chemical reactions using electric fields, which is both fast and energy efficient.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"380 ","pages":"Article 137747"},"PeriodicalIF":2.7000,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Letters","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0167577X24018871","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
The present work shows that the rate of a chemical reaction can be enhanced by application of electric field and the reaction temperature can be lowered significantly. Roasting is a metallurgical process where metal sulphides transform into metal oxide when heated in presence of air. Conventional roasting of zinc sulphide (ZnS) requires high temperatures (>800 °C) and is a sluggish process. Field-induced roasting and densification occurred together at a furnace temperature as low as 650 °C in <10 s. Interrupted experiments in stage III of flash showed that cubic ZnS first transformed to hexagonal ZnS at ∼ 844 °C (which appears above 1020 °C) before transforming to ZnO. The hexagonal phase was retained at room temperature only if the flash was turned off in <5 s. This study introduces a new method for speeding up chemical reactions using electric fields, which is both fast and energy efficient.
期刊介绍：
Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review.
Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials.
Contributions include, but are not limited to, a variety of topics such as:
• Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors
• Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart
• Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction
• Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots.
• Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing.
• Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic
• Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
