Sökning: WFRF:(Wu Jieying) > A study on the ther...
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000 | 03147naa a2200409 4500 | |
001 | oai:DiVA.org:su-117747 | |
003 | SwePub | |
008 | 150601s2015 | |||||||||||000 ||eng| | |
024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1177472 URI |
024 | 7 | a https://doi.org/10.1039/c5dt00711a2 DOI |
040 | a (SwePub)su | |
041 | a engb eng | |
042 | 9 SwePub | |
072 | 7 | a ref2 swepub-contenttype |
072 | 7 | a art2 swepub-publicationtype |
100 | 1 | a Li, Wenjie4 aut |
245 | 1 0 | a A study on the thermal conversion of scheelite-type ABO(4) into perovskite-type AB(O,N)(3) |
264 | c 2015 | |
264 | 1 | b Royal Society of Chemistry (RSC),c 2015 |
338 | a print2 rdacarrier | |
520 | a Phase-pure scheelite AMoO(4) and AWO(4) (A = Ba, Sr, Ca) were thermally treated under an ammonia atmosphere at 400 to 900 degrees C. SrMoO4 and SrWO4 were shown to convert into cubic perovskite SrMoO2N and SrWO1.5N1.5, at 700 degrees C and 900 degrees C respectively, and to form metastable intermediate phases (scheelite SrMoO4-xNx and SrWO4-xNx), as revealed by X-ray diffraction (XRD), elemental analysis and FTIR spectroscopy. High-temperature oxide melt solution calorimetry reveals that the enthalpy of formation for SrM(O,N)(3) (M = Mo, W) perovskites is less negative than that of the corresponding scheelite oxides, though the conversion of the scheelite oxides into perovskite oxynitrides is thermodynamically favorable at moderate temperatures. The reaction of BaMO4 with ammonia leads to the formation of rhombohedral Ba3M2(O,N)(8) and the corresponding binary metal nitrides Mo3N2 and W4.6N4; similar behavior was observed for CaMO4, which converted upon ammonolysis into individual oxides and nitrides. Thus, BaMO4 and CaMO4 were shown to not provide access to perovskite oxynitrides. The influence of the starting scheelite oxide precursor, the structure distortion and the degree of covalency of the B-site-N bond are discussed within the context of the formability of perovskite oxynitrides. | |
650 | 7 | a NATURVETENSKAPx Kemi0 (SwePub)1042 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Chemical Sciences0 (SwePub)1042 hsv//eng |
700 | 1 | a Li, Duanu Stockholms universitet,Institutionen för material- och miljökemi (MMK)4 aut0 (Swepub:su)dli |
700 | 1 | a Gao, Xinu Stockholms universitet,Institutionen för material- och miljökemi (MMK)4 aut |
700 | 1 | a Gurlo, Aleksander4 aut |
700 | 1 | a Zander, Stefan4 aut |
700 | 1 | a Jones, Philip4 aut |
700 | 1 | a Navrotsky, Alexandra4 aut |
700 | 1 | a Shen, Zhijianu Stockholms universitet,Institutionen för material- och miljökemi (MMK)4 aut0 (Swepub:su)shen |
700 | 1 | a Riedel, Ralf4 aut |
700 | 1 | a Ionescu, Emanuel4 aut |
710 | 2 | a Stockholms universitetb Institutionen för material- och miljökemi (MMK)4 org |
773 | 0 | t Dalton Transactionsd : Royal Society of Chemistry (RSC)g 44:17, s. 8238-8246q 44:17<8238-8246x 1477-9226x 1477-9234 |
856 | 4 | u https://depositonce.tu-berlin.de/bitstream/11303/6960/1/c5dt00711a.pdf |
856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-117747 |
856 | 4 8 | u https://doi.org/10.1039/c5dt00711a |
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