Ceramic and Powder Analysis

Phase purity of beta-tricalcium phosphate (ISO 13175-3 and ISO 13779-3)

The phase purity of β-tricalcium phosphate bone graft substitute material is determined by X-ray diffraction (XRD). Data evaluation by state-of-the-art Rietveld refinement was adapted from ISO 13175-3 and ISO 13779-3 and is compliant with ASTM F1088.

Equipment: Bruker D8 Advance diffractometer with CuKα radiation and a LynxEye XE energy dispersive linear detector / current release of the ICDD PDF-4+ structure database / BGMN and Profex Rietveld refinement software

Contact: Nicola Döbelin+41 32 644-2041

Identification of crystalline main phases

Crystalline main phases are identified in ceramic and metallic samples by comparing an X-ray diffraction pattern (XRD) with a crystal structure database. Depending on the complexity of the diffraction pattern, phases of less than ten weight percent can be identified.

Equipment: Bruker D8 Advance diffractometer with CuKα radiation and a LynxEye XE energy dispersive linear detector / current release of the ICDD PDF-4+ structure database / Match! identification software

Contact: Nicola Döbelin+41 32 644-2041

Residual moisture content

The residual moisture content is calculated from the weight loss after intense drying according to Ph. Eur. Monography 2.2.32. „Loss on drying“ 01/2008:20232.

Equipment: Drying furnace Memmert Typ ULP 500 and UFP 500 / Precision scale Mettler Toledo AX205

Contact: Nicola Döbelin+41 32 644-2041

Setting time and setting reaction temperature

This test setup determines the setting time and the maximum reaction temperature of exothermic cement reactions according to ASTM F451-99a (reapproved 2007).

Equipment: Center 309 Data Logger with Thermocontrol TKI20/50FIM.K thermo couples

Contact: Nicola Döbelin+41 32 644-2041

Identification and quantification of ceramic degradation products

This test determines the amount of dissolved material from ceramic products according to ISO 10993-14.

Equipment: Climate chamber Feutron KPK 200 / Orbital shaker GFL Type 3017 / Agilent 7700x ICP MS

Contact: Marc Bohner+41 32 644-2040

Cohesion of pastes and cements

In a specifically developed test setup we analyze the cohesion of pastes and cements in an aqueous environment. The result reveals how fast a paste dissolves or disintegrates in water. The setup can analyze paste volumes from 0.5 to 10 ml at room temperature.

Equipment: Precision Scale Mettler-Toledo PR5002

Contact: Nicola Döbelin+41 32 644-2041

Determination of the specific surface area of powders and porous solids

In the BET method (Brunauer, Emmet and Teller) we use gas adsorption to determine the specific surface of solids. The nitrogen adsorption at a tem­pe­ra­ture of liquid nitrogen is used as standard method.

Equipment: Tristar Plus 3030, Micromeritics

Contact: Marc Bohner+41 32 644-2040

to top