Abdullah Devrim Pekdemir, Müşerref Önal, Yüksel Sarikaya
{"title":"从硼酸-甘露醇复合酯中制备结晶度最高的碳化硼粉末的最佳热解条件。","authors":"Abdullah Devrim Pekdemir, Müşerref Önal, Yüksel Sarikaya","doi":"10.55730/1300-0527.3620","DOIUrl":null,"url":null,"abstract":"<p><p>A weak acidic complex ester (CE) in solid form was prepared by a condensation reaction between very weak boric acid (BA: H<sub>3</sub>BO<sub>3</sub>) and (D)-mannitol (MA: C<sub>6</sub>H<sub>14</sub>O<sub>6</sub>) by the molar ratio of BA/MA = 2. A boron carbide (B<sub>4</sub>C) precursor was obtained from heating of the CE at 400 °C for 4 h. The precursor was pyrolyzed under argon flow in the interval of 1300-1550 °C for 4 h and at 1400 °C for 1-4 h, respectively. The materials were examined using several techniques such as X-ray diffraction analysis, thermal analysis, scanning electron microscopy, particle size distribution, and nitrogen adsorption/desorption. The optimum pyrolysis temperature and duration were 1400 °C and 4 h, respectively. The most crystalline B<sub>4</sub>C particles were distributed between 1 and 100 μm with a mean particle size of 20 μm. The specific surface area and specific pore volume were 13.5 m<sup>2</sup> g<sup>-1</sup> and 0.09 cm<sup>3</sup> g<sup>-1</sup>, respectively. The size of the pores was between 2 and 36 nm with a mean size of 14 nm.</p>","PeriodicalId":23367,"journal":{"name":"Turkish Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":1.3000,"publicationDate":"2023-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10965183/pdf/","citationCount":"0","resultStr":"{\"title\":\"Optimum pyrolysis conditions to prepare the most crystalline boron carbide powder from boric acid-mannitol complex ester.\",\"authors\":\"Abdullah Devrim Pekdemir, Müşerref Önal, Yüksel Sarikaya\",\"doi\":\"10.55730/1300-0527.3620\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>A weak acidic complex ester (CE) in solid form was prepared by a condensation reaction between very weak boric acid (BA: H<sub>3</sub>BO<sub>3</sub>) and (D)-mannitol (MA: C<sub>6</sub>H<sub>14</sub>O<sub>6</sub>) by the molar ratio of BA/MA = 2. A boron carbide (B<sub>4</sub>C) precursor was obtained from heating of the CE at 400 °C for 4 h. The precursor was pyrolyzed under argon flow in the interval of 1300-1550 °C for 4 h and at 1400 °C for 1-4 h, respectively. The materials were examined using several techniques such as X-ray diffraction analysis, thermal analysis, scanning electron microscopy, particle size distribution, and nitrogen adsorption/desorption. The optimum pyrolysis temperature and duration were 1400 °C and 4 h, respectively. The most crystalline B<sub>4</sub>C particles were distributed between 1 and 100 μm with a mean particle size of 20 μm. The specific surface area and specific pore volume were 13.5 m<sup>2</sup> g<sup>-1</sup> and 0.09 cm<sup>3</sup> g<sup>-1</sup>, respectively. The size of the pores was between 2 and 36 nm with a mean size of 14 nm.</p>\",\"PeriodicalId\":23367,\"journal\":{\"name\":\"Turkish Journal of Chemistry\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.3000,\"publicationDate\":\"2023-10-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10965183/pdf/\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Turkish Journal of Chemistry\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://doi.org/10.55730/1300-0527.3620\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2023/1/1 0:00:00\",\"PubModel\":\"eCollection\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Turkish Journal of Chemistry","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.55730/1300-0527.3620","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2023/1/1 0:00:00","PubModel":"eCollection","JCR":"Q3","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Optimum pyrolysis conditions to prepare the most crystalline boron carbide powder from boric acid-mannitol complex ester.
A weak acidic complex ester (CE) in solid form was prepared by a condensation reaction between very weak boric acid (BA: H3BO3) and (D)-mannitol (MA: C6H14O6) by the molar ratio of BA/MA = 2. A boron carbide (B4C) precursor was obtained from heating of the CE at 400 °C for 4 h. The precursor was pyrolyzed under argon flow in the interval of 1300-1550 °C for 4 h and at 1400 °C for 1-4 h, respectively. The materials were examined using several techniques such as X-ray diffraction analysis, thermal analysis, scanning electron microscopy, particle size distribution, and nitrogen adsorption/desorption. The optimum pyrolysis temperature and duration were 1400 °C and 4 h, respectively. The most crystalline B4C particles were distributed between 1 and 100 μm with a mean particle size of 20 μm. The specific surface area and specific pore volume were 13.5 m2 g-1 and 0.09 cm3 g-1, respectively. The size of the pores was between 2 and 36 nm with a mean size of 14 nm.
期刊介绍:
The Turkish Journal of Chemistry is a bimonthly multidisciplinary journal published by the Scientific and Technological Research Council of Turkey (TÜBİTAK).
The journal is dedicated to dissemination of knowledge in all disciplines of chemistry (organic, inorganic, physical, polymeric, technical, theoretical and analytical chemistry) as well as research at the interface with other sciences especially in chemical engineering where molecular aspects are key to the findings.
The journal accepts English-language original manuscripts and contribution is open to researchers of all nationalities.
The journal publishes refereed original papers, reviews, letters to editor and issues devoted to special fields.
All manuscripts are peer-reviewed and electronic processing ensures accurate reproduction of text and data, plus publication times as short as possible.