Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Johannes Theodorus Nel"'
Autor:
Saphina Biira, Johannes Theodorus Nel, T.P. Ntsoane, E.G. Njoroge, Philippus L. Crouse, Thulani Thokozani Hlatshwayo, Johan B. Malherbe
Publikováno v:
Ceramics International. 43:15133-15140
Necsa and the Department of Science and Technology of South Africa through the Nuclear Materials Development Network of the Advanced Metals Initiative.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c33cd27b29fda4c79a943715cba9585a
https://doi.org/10.1016/j.ceramint.2017.08.042
https://doi.org/10.1016/j.ceramint.2017.08.042
Publikováno v:
Hydrometallurgy. 173:192-198
The study involved the separation of Ta and Nb in a phosphate matrix using ion exchange chromatography. Experimental variations included different types of Ta/Nb containing samples, types of resin, phosphoric acid concentration as eluent, flow rate a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dae98806b5ee9115bf62135e71893d47
https://doi.org/10.1016/j.hydromet.2017.08.018
https://doi.org/10.1016/j.hydromet.2017.08.018
Autor:
Johannes Theodorus Nel, H. Bissett, B.A.B. Alawad, Saphina Biira, Thulani Thokozani Hlatshwayo, Johan B. Malherbe, Philippus L. Crouse
Publikováno v:
Thin Solid Films. 624:61-69
A chemical vapour deposition process using radio frequency induction heating operating at atmospheric pressure was developed for the deposition of ZrC coatings. The precursors utilised in this process were zirconium tetrachloride and methane as zirco
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::665f622e9264950edb31172ce46aea68
https://doi.org/10.1016/j.tsf.2017.01.018
https://doi.org/10.1016/j.tsf.2017.01.018
Autor:
Saphina Biira, Thulani Thokozani Hlatshwayo, Philippus L. Crouse, T.P. Ntsoane, Johan B. Malherbe, Johannes Theodorus Nel, B.A.B. Alawad, H. Bissett
Publikováno v:
Ceramics International. 43:1354-1361
The influence of the gap between the gas inlet and the substrate in an in-house developed thermal chemical vapour deposition (CVD) reactor, on the growth rate, surface morphology, phase composition and microstructure of deposited ZrC films was invest
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14ffdfa18eca578601a1bcc778134ebb
https://doi.org/10.1016/j.ceramint.2016.10.092
https://doi.org/10.1016/j.ceramint.2016.10.092
Publikováno v:
Journal of the Southern African Institute of Mining and Metallurgy, Volume: 116, Issue: 10, Pages: 915-920, Published: OCT 2016
The suitability of the amine-based extractants Alamine 336, Aliquat 336 and Uniquat 2280 (10 wt%) for the selective extraction of zirconium (Zr) and hafnium (Hf) from a (NH4)3Zr(Hf)F7 solution was investigated. The extractant-containing organic phase
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b75f760db7f8e524760b286bef1c94fd
https://doi.org/10.17159/2411-9717/2016/v116n10a4
https://doi.org/10.17159/2411-9717/2016/v116n10a4
Publikováno v:
Journal of the Southern African Institute of Mining and Metallurgy. :966-971
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4979a91fb2e344ef7762d5ff8d3f0a5c
https://doi.org/10.17159/2411-9717/2015/v115n10a11
https://doi.org/10.17159/2411-9717/2015/v115n10a11
Publikováno v:
Journal of the Southern African Institute of Mining and Metallurgy, Volume: 115, Issue: 10, Pages: 943-948, Published: OCT 2015
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::76f768a8ef03958dd6e337c326c5f9dd
https://doi.org/10.17159/2411-9717/2015/v115n10a7
https://doi.org/10.17159/2411-9717/2015/v115n10a7
Publikováno v:
Emerging Trends in Chemical Sciences ISBN: 9783319604077
Capabilities of the radio frequency glow discharge optical emission spectroscopy (RF-GD-OES) for analysis of Ta2O5/Nb2O5 and tantalum and niobium in electrically non-conducting geological samples were investigated. The metal pentoxides (Ta2O5 and Nb2
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::da1b54df5f6056adee73054dfc7d20a8
https://doi.org/10.1007/978-3-319-60408-4_2
https://doi.org/10.1007/978-3-319-60408-4_2
Publikováno v:
International Journal of Minerals, Metallurgy, and Materials. 21:1153-1159
Primary beneficiation was successfully performed prior to dissolution of manganotantalite (sample A) and ferrotantalite (sample C) samples obtained from two different mines in the Naquissupa area, Mozambique. Magnetic separation removed the majority
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::69c8884f45beb35d99bbcd0ff7eeaad1
https://doi.org/10.1007/s12613-014-1022-6
https://doi.org/10.1007/s12613-014-1022-6
Publikováno v:
Hydrometallurgy. 149:31-40
A step-wise separation process for niobium and tantalum from tantalite by extraction and ion exchange was developed. A tantalite mineral was dissolved by a fusion technique using ammonium bifluoride as flux. Tantalum and niobium form stable anionic f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::189d6878192cc8219f2a2b476bfab216
https://doi.org/10.1016/j.hydromet.2014.06.006
https://doi.org/10.1016/j.hydromet.2014.06.006