{"title":"Mass Spectrometric Study of Evaporation of Hydroxyapatite at Temperatures up to 2200 K","authors":"S. I. Lopatin, A. A. Selyutin, V. L. Stolyarova","doi":"10.1134/S0036024424701085","DOIUrl":null,"url":null,"abstract":"<p>The composition of the gas phase was identified for the first time up to a temperature of 2200 K by the Knudsen effusion mass spectrometric method, and the partial pressures of the vapor species during the evaporation of hydroxyapatite were determined. Ca<sub>10</sub>(PO<sub>4</sub>)<sub>6</sub>(OH)<sub>2</sub> was evaporated from a Knudsen effusion cell made of tungsten. In the temperature range 1200–1300 K, Ca<sub>10</sub>(PO<sub>4</sub>)<sub>6</sub>(OH)<sub>2</sub> undergoes dehydration, forming Ca<sub>3</sub>P<sub>2</sub>O<sub>8</sub>, which evaporates in the form of PO, atomic calcium, and oxygen when the temperature further increases to 1750–2200 K.</p>","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":null,"pages":null},"PeriodicalIF":0.7000,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Journal of Physical Chemistry A","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1134/S0036024424701085","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The composition of the gas phase was identified for the first time up to a temperature of 2200 K by the Knudsen effusion mass spectrometric method, and the partial pressures of the vapor species during the evaporation of hydroxyapatite were determined. Ca10(PO4)6(OH)2 was evaporated from a Knudsen effusion cell made of tungsten. In the temperature range 1200–1300 K, Ca10(PO4)6(OH)2 undergoes dehydration, forming Ca3P2O8, which evaporates in the form of PO, atomic calcium, and oxygen when the temperature further increases to 1750–2200 K.
摘要 利用克努森渗流质谱法首次鉴定了温度高达 2200 K 的气相组成，并测定了羟基磷灰石蒸发过程中气态物质的分压。Ca10(PO4)6(OH)2是从钨制成的克努森渗流池中蒸发出来的。在 1200-1300 K 的温度范围内，Ca10(PO4)6(OH)2 发生脱水，形成 Ca3P2O8，当温度进一步升高到 1750-2200 K 时，Ca3P2O8 以 PO、原子钙和氧的形式蒸发。
期刊介绍：
Russian Journal of Physical Chemistry A. Focus on Chemistry (Zhurnal Fizicheskoi Khimii), founded in 1930, offers a comprehensive review of theoretical and experimental research from the Russian Academy of Sciences, leading research and academic centers from Russia and from all over the world.
Articles are devoted to chemical thermodynamics and thermochemistry, biophysical chemistry, photochemistry and magnetochemistry, materials structure, quantum chemistry, physical chemistry of nanomaterials and solutions, surface phenomena and adsorption, and methods and techniques of physicochemical studies.
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