The crystallisation of Alkaline-earth Metal Tungstates from solutions in Sodium Tungstate Melts
Kerja ini mengemukakan suatu kajian mengenai penghabluran Tungstat logam Alkali-Bumi dari larutan lebur Natrium Tungstat. Keterlarutan Garam-Garam logam Alkali-Bumi pada suhu-suhu yang berbeza antara 600° ke 1200°C telah didapati dari bahan bacaan yang tertentu. Kajian kuantitatif peringkat awal...
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1977
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my-usm-ep.353332017-07-04T08:05:35Z The crystallisation of Alkaline-earth Metal Tungstates from solutions in Sodium Tungstate Melts 1977-03 Subramaniam, Appalasami QD1-999 Chemistry Kerja ini mengemukakan suatu kajian mengenai penghabluran Tungstat logam Alkali-Bumi dari larutan lebur Natrium Tungstat. Keterlarutan Garam-Garam logam Alkali-Bumi pada suhu-suhu yang berbeza antara 600° ke 1200°C telah didapati dari bahan bacaan yang tertentu. Kajian kuantitatif peringkat awal mengenai penghabluran Titanat Logam Alkali-Bumi dibuat dengan cora penyejukan perlahan yang berterusan kepada larutan tepu lebur Logam Klorid Alkali-Buml dart suhu pengabl.wan awtd, T~ = 1000° ke 1200°C, ke takat suhu ambien. Kesan suhu penghabluran awol dan keterlarutan zat laruton suhu penghabluran awal(soling tindakon zat larutan-pelarut) dan kadarcepat penyejukan atas bentuk hablur ohkir dikaii. Hastl kojion ini dibanding dengon hasil kojion peringkat awol mengenai penghobluran Tungstat Logam Alkali-Bumi dengan cora penyejukan perlahan berterusan kepada larutantepu lebur Tungstat Natrium dari suhu-suhu penghabluran awal, T 0 = 800 ke 1000 C, ke takat suhu ambien. Tungstat Natrium digunakan sebagai pelarut yang sesuai bagi penghabluran Tungstat Logam Alkali~Bumi dalam lingkungkan bezantara suhu T 0 = 800° ke 1000°C dan kadar-kadar penyejukan RT = 40° ke 200° C sejam. This work presents a study of the crystallisation of Alkaline-earth Metal Tungstates from solutions in Sodium Tungstate Melts. The solubilities of the Alkaline-earth Metal Salts in Sodium Tungstate at various temperatures from 600° to 1200° C were obtained from the I i terature • Preliminary quantitative studies were made on the crystallisation of Alkaline-earth Metal Titanates by slow continuous cooling of saturated solutions in Alkaline-earth Metal Chloride Melts from initial crystallisation temperatures, T0 = 1000° to 1200° C, down to ambient temperature. The effects of initial crystallisation temperature and solute solubility at the initial crystallisation temperature (solute-solvent interaction) and the rate of cooling on the final crystal form and size were investigated. These results were compared with the results of the preliminary studies on the crystallisation of Alkaline-earth Metal Tungstates by slow continuous cooling of saturated solutions in Sodium Tungstate Melts from initial crystallisation temperatures, T0 = 800°to 1000° C, down to ambient temperature. Sodium Tungstate was a suitable solvent for crystallisation of the Alkaline-earth Metal Tungstates within the temperature range T0 =8000 to I000°C and rates of cooling RT = 40° to 2000C/hr. 1977-03 Thesis http://eprints.usm.my/35333/ http://eprints.usm.my/35333/1/APPALASAMI_SUBRAMANIAM_%28KHK%29_%28NN24%29.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Sains Kimia (School of Chemical Science) |
| institution |
Universiti Sains Malaysia |
| collection |
USM Institutional Repository |
| language |
English |
| topic |
QD1-999 Chemistry |
| spellingShingle |
QD1-999 Chemistry Subramaniam, Appalasami The crystallisation of Alkaline-earth Metal Tungstates from solutions in Sodium Tungstate Melts |
| description |
Kerja ini mengemukakan suatu kajian mengenai penghabluran
Tungstat logam Alkali-Bumi dari larutan lebur Natrium Tungstat.
Keterlarutan Garam-Garam logam Alkali-Bumi pada suhu-suhu
yang berbeza antara 600° ke 1200°C telah didapati dari bahan bacaan yang
tertentu. Kajian kuantitatif peringkat awal mengenai penghabluran Titanat
Logam Alkali-Bumi dibuat dengan cora penyejukan perlahan yang berterusan
kepada larutan tepu lebur Logam Klorid Alkali-Buml dart suhu pengabl.wan
awtd, T~ = 1000° ke 1200°C, ke takat suhu ambien. Kesan suhu penghabluran
awol dan keterlarutan zat laruton suhu penghabluran awal(soling tindakon zat
larutan-pelarut) dan kadarcepat penyejukan atas bentuk hablur ohkir dikaii.
Hastl kojion ini dibanding dengon hasil kojion peringkat awol mengenai
penghobluran Tungstat Logam Alkali-Bumi dengan cora penyejukan perlahan
berterusan kepada larutantepu lebur Tungstat Natrium dari suhu-suhu penghabluran awal, T 0 = 800 ke 1000 C, ke takat suhu ambien. Tungstat
Natrium digunakan sebagai pelarut yang sesuai bagi penghabluran Tungstat
Logam Alkali~Bumi dalam lingkungkan bezantara suhu T
0 = 800° ke 1000°C dan kadar-kadar penyejukan RT = 40° ke 200° C sejam.
This work presents a study of the crystallisation of Alkaline-earth
Metal Tungstates from solutions in Sodium Tungstate Melts.
The solubilities of the Alkaline-earth Metal Salts in Sodium Tungstate
at various temperatures from 600° to 1200° C were obtained from the
I i terature •
Preliminary quantitative studies were made on the crystallisation of
Alkaline-earth Metal Titanates by slow continuous cooling of saturated solutions
in Alkaline-earth Metal Chloride Melts from initial crystallisation temperatures,
T0 = 1000° to 1200° C, down to ambient temperature. The effects of initial
crystallisation temperature and solute solubility at the initial crystallisation
temperature (solute-solvent interaction) and the rate of cooling on the final
crystal form and size were investigated. These results were compared with the
results of the preliminary studies on the crystallisation of Alkaline-earth Metal
Tungstates by slow continuous cooling of saturated solutions in Sodium Tungstate
Melts from initial crystallisation temperatures, T0 = 800°to 1000° C, down to
ambient temperature. Sodium Tungstate was a suitable solvent for crystallisation
of the Alkaline-earth Metal Tungstates within the temperature range T0 =8000
to I000°C and rates of cooling RT = 40° to 2000C/hr.
|
| format |
Thesis |
| qualification_level |
Master's degree |
| author |
Subramaniam, Appalasami |
| author_facet |
Subramaniam, Appalasami |
| author_sort |
Subramaniam, Appalasami |
| title |
The crystallisation of Alkaline-earth Metal Tungstates from solutions in Sodium Tungstate Melts
|
| title_short |
The crystallisation of Alkaline-earth Metal Tungstates from solutions in Sodium Tungstate Melts
|
| title_full |
The crystallisation of Alkaline-earth Metal Tungstates from solutions in Sodium Tungstate Melts
|
| title_fullStr |
The crystallisation of Alkaline-earth Metal Tungstates from solutions in Sodium Tungstate Melts
|
| title_full_unstemmed |
The crystallisation of Alkaline-earth Metal Tungstates from solutions in Sodium Tungstate Melts
|
| title_sort |
crystallisation of alkaline-earth metal tungstates from solutions in sodium tungstate melts |
| granting_institution |
Universiti Sains Malaysia |
| granting_department |
Pusat Pengajian Sains Kimia (School of Chemical Science) |
| publishDate |
1977 |
| url |
http://eprints.usm.my/35333/1/APPALASAMI_SUBRAMANIAM_%28KHK%29_%28NN24%29.pdf |
| _version_ |
1747820582426116096 |