{"title":"锆酸镧陶瓷的热膨胀","authors":"V. R. Khrustov, A. S. Kaygorodov, S. V. Zayats","doi":"10.1134/S2075113325701400","DOIUrl":null,"url":null,"abstract":"<p>The high-temperature behavior of lanthanum zirconate ceramics was studied depending on the conditions of La<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub> synthesis and sintering. Lanthanum zirconate was obtained by solid-phase synthesis, the ceramics were sintered in the temperature range of 1500–1550°C at different holding times. Thermal expansion and shrinkage activity of ceramics were studied by dilatometric analysis. Linear thermal expansion coefficients (LTECs) were determined in the temperature range of 200–1200°C during heating and cooling. The LTEC of the obtained ceramics is 9.1 × 10<sup>–6</sup> 1/K, which is significantly less than the LTEC of tetragonal zirconium dioxide doped with yttria (YSZ), 13.5 × 10<sup>–6</sup> 1/K. The LTEC decreases as the density of the ceramics increases. The microhardness of synthesized ceramics is 6.3 GPa.</p>","PeriodicalId":586,"journal":{"name":"Inorganic Materials: Applied Research","volume":"16 5","pages":"1333 - 1337"},"PeriodicalIF":0.3000,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"The Thermal Expansion of Lanthanum Zirconate Ceramics\",\"authors\":\"V. R. Khrustov, A. S. Kaygorodov, S. V. Zayats\",\"doi\":\"10.1134/S2075113325701400\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The high-temperature behavior of lanthanum zirconate ceramics was studied depending on the conditions of La<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub> synthesis and sintering. Lanthanum zirconate was obtained by solid-phase synthesis, the ceramics were sintered in the temperature range of 1500–1550°C at different holding times. Thermal expansion and shrinkage activity of ceramics were studied by dilatometric analysis. Linear thermal expansion coefficients (LTECs) were determined in the temperature range of 200–1200°C during heating and cooling. The LTEC of the obtained ceramics is 9.1 × 10<sup>–6</sup> 1/K, which is significantly less than the LTEC of tetragonal zirconium dioxide doped with yttria (YSZ), 13.5 × 10<sup>–6</sup> 1/K. The LTEC decreases as the density of the ceramics increases. The microhardness of synthesized ceramics is 6.3 GPa.</p>\",\"PeriodicalId\":586,\"journal\":{\"name\":\"Inorganic Materials: Applied Research\",\"volume\":\"16 5\",\"pages\":\"1333 - 1337\"},\"PeriodicalIF\":0.3000,\"publicationDate\":\"2025-09-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Inorganic Materials: Applied Research\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S2075113325701400\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Inorganic Materials: Applied Research","FirstCategoryId":"1085","ListUrlMain":"https://link.springer.com/article/10.1134/S2075113325701400","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
The Thermal Expansion of Lanthanum Zirconate Ceramics
The high-temperature behavior of lanthanum zirconate ceramics was studied depending on the conditions of La2Zr2O7 synthesis and sintering. Lanthanum zirconate was obtained by solid-phase synthesis, the ceramics were sintered in the temperature range of 1500–1550°C at different holding times. Thermal expansion and shrinkage activity of ceramics were studied by dilatometric analysis. Linear thermal expansion coefficients (LTECs) were determined in the temperature range of 200–1200°C during heating and cooling. The LTEC of the obtained ceramics is 9.1 × 10–6 1/K, which is significantly less than the LTEC of tetragonal zirconium dioxide doped with yttria (YSZ), 13.5 × 10–6 1/K. The LTEC decreases as the density of the ceramics increases. The microhardness of synthesized ceramics is 6.3 GPa.
期刊介绍：
Inorganic Materials: Applied Research contains translations of research articles devoted to applied aspects of inorganic materials. Best articles are selected from four Russian periodicals: Materialovedenie, Perspektivnye Materialy, Fizika i Khimiya Obrabotki Materialov, and Voprosy Materialovedeniya and translated into English. The journal reports recent achievements in materials science: physical and chemical bases of materials science; effects of synergism in composite materials; computer simulations; creation of new materials (including carbon-based materials and ceramics, semiconductors, superconductors, composite materials, polymers, materials for nuclear engineering, materials for aircraft and space engineering, materials for quantum electronics, materials for electronics and optoelectronics, materials for nuclear and thermonuclear power engineering, radiation-hardened materials, materials for use in medicine, etc.); analytical techniques; structure–property relationships; nanostructures and nanotechnologies; advanced technologies; use of hydrogen in structural materials; and economic and environmental issues. The journal also considers engineering issues of materials processing with plasma, high-gradient crystallization, laser technology, and ultrasonic technology. Currently the journal does not accept direct submissions, but submissions to one of the source journals is possible.
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