{"title":"烧结温度对 Al2O3-SiO2-CaO 无压烧结氧化铝陶瓷微观结构和机械性能的影响","authors":"Donghai Ding, Yue Guan, Guoqing Xiao, Zhaoyuan Mao, Xiaoqi Shi, Kaiqiang Gao, Xiaochuan Chong, Jiyuan Luo, Changkun Lei","doi":"10.1007/s11148-023-00816-y","DOIUrl":null,"url":null,"abstract":"<p>The alumina ceramics with high compressive strength were prepared by pressureless sintering, and the kaolinite and calcium carbonate were added as Al<sub>2</sub>O<sub>3</sub>–SiO<sub>2</sub>–CaO sintering aids. The effects of sintering temperature on the volume shrinkage, bulk density, water absorption and compressive strength of the alumina ceramics were studied. The phase composition, crystal cell parameters, average grain size and microstructure of the ceramic were analyzed by XRD, SEM and EDS. The results show that the lattice tends to packed with the increase of sintering temperature. The bonding between grains is the most compact after sintering at 1700°C. The volume shrinkage increases with the increase of sintering temperature. The water absorption of alumina ceramics after sintering at 1700°C reaches the minimum value of 0.06%. The bulk density and compressive strength increase first and then decrease with the increase of sintering temperature. At 1700°C, optimized mechanical properties of alumina ceramics is obtained, with a bulk density of 3.80 g/cm<sup>3</sup> and a compressive strength of 1323 MPa.</p>","PeriodicalId":751,"journal":{"name":"Refractories and Industrial Ceramics","volume":null,"pages":null},"PeriodicalIF":0.4000,"publicationDate":"2023-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effects of Sintering Temperature on Microstructure and Mechanical Properties of Pressureless Sintering Alumina Ceramics with Al2O3–SiO2–CaO Sintering Aids\",\"authors\":\"Donghai Ding, Yue Guan, Guoqing Xiao, Zhaoyuan Mao, Xiaoqi Shi, Kaiqiang Gao, Xiaochuan Chong, Jiyuan Luo, Changkun Lei\",\"doi\":\"10.1007/s11148-023-00816-y\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The alumina ceramics with high compressive strength were prepared by pressureless sintering, and the kaolinite and calcium carbonate were added as Al<sub>2</sub>O<sub>3</sub>–SiO<sub>2</sub>–CaO sintering aids. The effects of sintering temperature on the volume shrinkage, bulk density, water absorption and compressive strength of the alumina ceramics were studied. The phase composition, crystal cell parameters, average grain size and microstructure of the ceramic were analyzed by XRD, SEM and EDS. The results show that the lattice tends to packed with the increase of sintering temperature. The bonding between grains is the most compact after sintering at 1700°C. The volume shrinkage increases with the increase of sintering temperature. The water absorption of alumina ceramics after sintering at 1700°C reaches the minimum value of 0.06%. The bulk density and compressive strength increase first and then decrease with the increase of sintering temperature. At 1700°C, optimized mechanical properties of alumina ceramics is obtained, with a bulk density of 3.80 g/cm<sup>3</sup> and a compressive strength of 1323 MPa.</p>\",\"PeriodicalId\":751,\"journal\":{\"name\":\"Refractories and Industrial Ceramics\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.4000,\"publicationDate\":\"2023-12-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Refractories and Industrial Ceramics\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11148-023-00816-y\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"MATERIALS SCIENCE, CERAMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Refractories and Industrial Ceramics","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s11148-023-00816-y","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
Effects of Sintering Temperature on Microstructure and Mechanical Properties of Pressureless Sintering Alumina Ceramics with Al2O3–SiO2–CaO Sintering Aids
The alumina ceramics with high compressive strength were prepared by pressureless sintering, and the kaolinite and calcium carbonate were added as Al2O3–SiO2–CaO sintering aids. The effects of sintering temperature on the volume shrinkage, bulk density, water absorption and compressive strength of the alumina ceramics were studied. The phase composition, crystal cell parameters, average grain size and microstructure of the ceramic were analyzed by XRD, SEM and EDS. The results show that the lattice tends to packed with the increase of sintering temperature. The bonding between grains is the most compact after sintering at 1700°C. The volume shrinkage increases with the increase of sintering temperature. The water absorption of alumina ceramics after sintering at 1700°C reaches the minimum value of 0.06%. The bulk density and compressive strength increase first and then decrease with the increase of sintering temperature. At 1700°C, optimized mechanical properties of alumina ceramics is obtained, with a bulk density of 3.80 g/cm3 and a compressive strength of 1323 MPa.
期刊介绍：
Refractories and Industrial Ceramics publishes peer-reviewed articles on the latest developments and discoveries in the field of refractory materials and ceramics, focusing on the practical aspects of their production and use.
Topics covered include:
Scientific Research;
Raw Materials;
Production;
Equipment;
Heat Engineering;
Applications.
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