Preparation of Apatite-Wollastonite and Phlogophite Glass Ceramic and Study of Its Properties

Kumar, A (2010) Preparation of Apatite-Wollastonite and Phlogophite Glass Ceramic and Study of Its Properties. BTech thesis.

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Since the discovery of bioglass by Hench in 1969, there has been a new beginning of making biocompatible materials having improved properties. The major success was achieved by kokubu with the formation of AW glass. Since then a lot of research has been done on AW glass to improve its properties.
Mica crystals possess excellent cleavage planes perpendicular to the c-axis because of weak bonding of alkali layers and hence have excellent machinability which can be utilized to prepare machinable bioactive glass.
In the current project work different proportion of Phlogophite(10 – 50%) were mixed with apatite-wollastonite glass ceramic and to determine its machinability and properties. From mixture of AW and Ph pallets were prepared and were crystallized at 950°C. X – Ray diffraction analysis of the samples has confirmed the desired phase formation o f crystals of AW and Ph.
The apparent porosity increases and bulk density decreases with the increase in Ph phase. Also the hardness decreases with the incorporation of Ph, hence suggesting that the machinability is increasing. The drilling operation done on two of the samples having 60:40 and 50:50 composition shows machinability. But both the samples break at the last stage of drilling which may be due to uneven phase distribution of Ph phase.

Item Type:Thesis (BTech)
Uncontrolled Keywords:apatite-wollastonite & phlogophite glass ceramic, machinability of AW glass ceramic
Subjects:Engineering and Technology > Ceramic Engnieering > Ceramic Materials
Divisions: Engineering and Technology > Department of Ceramic Engineering
ID Code:1707
Deposited By:Anuj Kumar
Deposited On:13 May 2010 14:58
Last Modified:13 May 2010 14:58
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Supervisor(s):Pal, S K

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