{"title":"Effect of K2O/Na2O addition on the microstructure and mechanical properties of CaO-MgO-Al2O3-SiO2 glass ceramic","authors":"Hong-Yang Wang, Shu-Qiang Jiao, Guo-Hua Zhang","doi":"10.1111/ijac.70006","DOIUrl":null,"url":null,"abstract":"<p>This work studied the effects of types of flux (K<sub>2</sub>O and Na<sub>2</sub>O) and sintering temperature on the microstructure and mechanical properties of augite-based glass ceramics (GCs). Fine glass powder (<i>D</i><sub>50 </sub>= 1.07 µm) was used as the starting material for preparing the GCs. The porosity of the samples decreased by increasing the sintering temperature from 850°C to 925°C, and a further increase in the sintering temperature to 950°C caused an increase in porosity from 0.2 to 1.8 vol%. The substitution of K<sub>2</sub>O for Na<sub>2</sub>O reduced the densification degree of GC. Nevertheless, K<sub>2</sub>O refined the grain size of augite to 24–33 nm, which enhanced the hardness of GC. Both Na<sub>2</sub>O-containing and K<sub>2</sub>O-containing GC prepared at 925°C showed their highest bending strength (GC-Na: 225 MPa, GC-K: 215 MPa) and Vickers hardness (GC-Na: 8.39 GPa, GC-K: 8.41 GPa).</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 5","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Applied Ceramic Technology","FirstCategoryId":"88","ListUrlMain":"https://ceramics.onlinelibrary.wiley.com/doi/10.1111/ijac.70006","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
引用次数: 0
Abstract
This work studied the effects of types of flux (K2O and Na2O) and sintering temperature on the microstructure and mechanical properties of augite-based glass ceramics (GCs). Fine glass powder (D50 = 1.07 µm) was used as the starting material for preparing the GCs. The porosity of the samples decreased by increasing the sintering temperature from 850°C to 925°C, and a further increase in the sintering temperature to 950°C caused an increase in porosity from 0.2 to 1.8 vol%. The substitution of K2O for Na2O reduced the densification degree of GC. Nevertheless, K2O refined the grain size of augite to 24–33 nm, which enhanced the hardness of GC. Both Na2O-containing and K2O-containing GC prepared at 925°C showed their highest bending strength (GC-Na: 225 MPa, GC-K: 215 MPa) and Vickers hardness (GC-Na: 8.39 GPa, GC-K: 8.41 GPa).
期刊介绍：
The International Journal of Applied Ceramic Technology publishes cutting edge applied research and development work focused on commercialization of engineered ceramics, products and processes. The publication also explores the barriers to commercialization, design and testing, environmental health issues, international standardization activities, databases, and cost models. Designed to get high quality information to end-users quickly, the peer process is led by an editorial board of experts from industry, government, and universities. Each issue focuses on a high-interest, high-impact topic plus includes a range of papers detailing applications of ceramics. Papers on all aspects of applied ceramics are welcome including those in the following areas:
Nanotechnology applications;
Ceramic Armor;
Ceramic and Technology for Energy Applications (e.g., Fuel Cells, Batteries, Solar, Thermoelectric, and HT Superconductors);
Ceramic Matrix Composites;
Functional Materials;
Thermal and Environmental Barrier Coatings;
Bioceramic Applications;
Green Manufacturing;
Ceramic Processing;
Glass Technology;
Fiber optics;
Ceramics in Environmental Applications;
Ceramics in Electronic, Photonic and Magnetic Applications;
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