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Construction of a crystallizer unit and its complete controlling systems and study of some parameters of TGS ferroelectric crystal / Seham Kamal Mohamed ; Supervised Mohamed Amin Soliman , Hamdy Mohamed Osman , Sobhy Saeed Ibrahim

By: Contributor(s): Language: Eng Publication details: Cairo : Seham Kamal Mohamed , 2006Description: 113P : ill ; 30cmOther title:
  • عمل وحدة انماء بلورى بنظام تحكم متكامل و دراسة بعض خواص بلورة كبريتات ثلاثى الجليسين الفيروكهربية [Added title page title]
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Dissertation note: Thesis (M.Sc.) - Cairo University - Faculty Of Science - Department Of Physics Summary: The present study deals with constructing an automatic low - cost crystallizer systemThe study of the produced sample is important to judge the performance of the constructed unitA well - known TGS sample was grown and some physical properties of the produced crystal are measured and then compared it with its published resultsTriglycine sulfate (NH2CH2COOH) 3H2SO4 (TGS) is a well known ferroelectric material since 1956 , has large pyroelectric coefficient and low dielectric constant (40) and it has been an important material used in the fabrication of infrared (IR) detectorsPure TGS shows a typical second order ferroelectric phase transition at the Curie point TC=49?CAbove the Curie temperature it belongs to non - polar point group 2 / m of the monoclinic systemBelow TC , spontaneous polarization PS arises along the b - axis of the polar point group 2 of the monoclinic systemThe crystal is non piezoelectric in the paraelectric state
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Thesis Thesis قاعة الرسائل الجامعية - الدور الاول المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.12.20.M.Sc.2006.Se.C. (Browse shelf(Opens below)) Not for loan 01010110046176000
CD - Rom CD - Rom مخـــزن الرســائل الجـــامعية - البدروم المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.12.20.M.Sc.2006.Se.C. (Browse shelf(Opens below)) Not for loan 01020110046176000

Thesis (M.Sc.) - Cairo University - Faculty Of Science - Department Of Physics

The present study deals with constructing an automatic low - cost crystallizer systemThe study of the produced sample is important to judge the performance of the constructed unitA well - known TGS sample was grown and some physical properties of the produced crystal are measured and then compared it with its published resultsTriglycine sulfate (NH2CH2COOH) 3H2SO4 (TGS) is a well known ferroelectric material since 1956 , has large pyroelectric coefficient and low dielectric constant (40) and it has been an important material used in the fabrication of infrared (IR) detectorsPure TGS shows a typical second order ferroelectric phase transition at the Curie point TC=49?CAbove the Curie temperature it belongs to non - polar point group 2 / m of the monoclinic systemBelow TC , spontaneous polarization PS arises along the b - axis of the polar point group 2 of the monoclinic systemThe crystal is non piezoelectric in the paraelectric state

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