Abstract
The effect of porosity on the elec. properties and polarization behavior of hydroxyapatite based ceramics prepd. in both dense and porous form was studied. Porosity was introduced into the hydroxyapatite using either burnt-out polymer spheres to produce isolated pores or using polymer foams to create interconnected porosity. The samples were sintered in water vapor at 1300° and polarized at 400° with a d.c. voltage of 3 kV/cm applied for 1 h. Thermally stimulated depolarization current measurements were used to investigate the degree of polarization of the hydroxyapatite ceramics and dielec. spectroscopy used to measure the a.c. cond. of the materials at the polarization temp. The porous materials were successfully polarized and the presence of a high surface area to vol. ratio in the porous samples was thought to increase the level of polarization. [on SciFinder(R)]
| Original language | English |
|---|---|
| Pages (from-to) | 168-176 |
| Number of pages | 9 |
| Journal | Ferroelectrics |
| Volume | 390 |
| Publication status | Published - 2009 |
Keywords
- Polyurethanes Role: NUU (Other use, unclassified), USES (Uses) (foam template
- influence of porosity on polarization and elec. properties of hydroxyapatite-based ceramics)
- Porosity (influence of porosity on polarization and elec. properties of hydroxyapatite based ceramics)
- Dielectric constant
- Dielectric polarization
- Electric conductivity
- Porous ceramics
- Surface area (influence of porosity on polarization and elec. properties of hydroxyapatite-based ceramics)
- hydroxyapatite porous ceramic polarization elec property