在高温湿行为和粘附机制的岩基融盐在SiC耐火基板上的粘附机制
Yuxi Feng1,2, Wandong Cheng1, Zhiyuan Rui1,2
1School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou 730050, China.
Materials (Basel, Switzerland)
|April 24, 2025
概括
在化盐渣中增加氧化可以提高其在SiC耐火材料上的浸湿性. 这增强了对渣渣粘附和电解侵蚀的防护性,这对于工业真空吸管至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 金工程 金工程 金工程
背景情况:
- 渣粘附于真空管内壁是一个关键的工业问题.
- 了解渣耐火相互作用是改善头层耐久性的关键.
研究的目的:
- 研究融盐渣和SiC耐火材料之间的界面可湿性,粘附性和透性.
- 确定氧化含量和温度对渣基板相互作用的影响.
主要方法:
- 使用Na3AlF6-Al2O3-CaF2渣和SiC基板进行高温湿性实验.
- 在不同的Al2O3度和温度下测量接触角度和表面张力.
- 使用米尔斯模型计算粘附工作.
主要成果:
- 渣渣中Al2O3含量的增加降低了接触角度,提高了湿透性.
- 较高的Al2O3导致渣化温度和表面张力增加,改善了机动性.
- 粘附的工作增加了Al2O3含量,表明粘合更强.
结论:
- 优化岩渣中的Al2O3含量可以提高性和对SiC耐火材料的粘附性.
- 通过优化基于SiC的耐火材料,可以实现更好的渣耐火相互作用阻力.
- 这些发现为开发耐用的内墙材料提供了指导,用于电解真空管.
相关概念视频
Hydroboration-Oxidation of Alkenes
In addition to the oxymercuration–demercuration method, which converts the alkenes to alcohols with Markovnikov orientation, a complementary hydroboration-oxidation method yields the anti-Markovnikov product. The hydroboration reaction, discovered in 1959 by H.C. Brown, involves the addition of a B–H bond of borane to an alkene giving an organoborane intermediate. The oxidation of this intermediate with basic hydrogen peroxide forms an alcohol.
Preparation of Alcohols via Addition Reactions
Overview
The acid-catalyzed addition of water to the double bond of alkenes is a large-scale industrial method used to synthesize low-molecular-weight alcohols. An acidic atmosphere is required to allow the hydrogen in the water molecule to act as an electrophile and attack the double bond in an alkene. The addition of a proton to the double bond creates a carbocation intermediate. The proton preferentially bonds to the less substituted end of the double bond to create a more stable carbocation...
The acid-catalyzed addition of water to the double bond of alkenes is a large-scale industrial method used to synthesize low-molecular-weight alcohols. An acidic atmosphere is required to allow the hydrogen in the water molecule to act as an electrophile and attack the double bond in an alkene. The addition of a proton to the double bond creates a carbocation intermediate. The proton preferentially bonds to the less substituted end of the double bond to create a more stable carbocation...
Acid-Catalyzed Dehydration of Alcohols to Alkenes
In a dehydration reaction, a hydroxyl group in an alcohol is eliminated along with the hydrogen from an adjacent carbon. Here, the products are an alkene and a molecule of water. Dehydration of alcohols is generally achieved by heating in the presence of an acid catalyst. While the dehydration of primary alcohols requires high temperatures and acid concentrations, secondary and tertiary alcohols can lose a water molecule under relatively mild conditions.
Oxidation of Alcohols
In this lesson, the oxidation of alcohols is discussed in depth. The various reagents used for oxidation of primary and secondary alcohols are detailed, and their mechanism of action is provided.
The process of oxidation in a chemical reaction is observed in any of the three forms:
The process of oxidation in a chemical reaction is observed in any of the three forms:
Preparation of Aldehydes and Ketones from Alcohols, Alkenes, and Alkynes
Aldehydes and ketones are prepared from alcohols, alkenes, and alkynes via different reaction pathways. Alcohols are the most commonly used substrates for synthesizing aldehydes and ketones. The conversion of alcohol to aldehyde, which involves the oxidation process, depends on the class of the alcohol used and the strength of the oxidizing agent. For instance, primary alcohol will form an aldehyde when treated with a weak oxidizing agent; however, it gets over-oxidized to a carboxylic acid in...
Reactions of Aldehydes and Ketones: Baeyer–Villiger Oxidation
Baeyer–Villiger oxidation converts aldehydes to carboxylic acids and ketones to esters. The reaction uses peroxy acids or peracids and is often catalyzed by acid. The reaction is named after its pioneers, Adolf von Baeyer and Victor Villiger. The reaction is achieved by a wide range of peracids such as m-chloroperoxybenzoic acid (mCPBA), perbenzoic acid (C6H5COOOH), peracetic acid (CH3COOOH), hydrogen peroxide (H2O2), and tert-butyl hydroperoxide (t-BuOOH).
The carbonyl center is activated by...
The carbonyl center is activated by...


