Showroom

Nkamouna cobalt-nickel, Minim-Martap bauxite, Mbalam iron, Akonolinga rutile, Kribi sands, western clays and kaolins. Each sample carries its provenance and elemental assay.

Cocoa husks, rice hulls, palm fibre, sawdust, displayed with their lower heating value, moisture content and proximate composition.

For each deposit, the functional material the academy derives from it: bauxite → alumina and ceramics, clays → varistors and dielectrics, iron → soft magnetic cores, rutile → titanium oxides.

Sodium-ion layered oxides, skutterudites, tetrahedrites, thermoelectric oxides: each batch comes with its X-ray diffractogram and its temperature-dependent transport curves.

Transparent conducting oxides, organic semiconductors, perovskite cells. Beside each fresh sample, a control aged under tropical conditions shows the real degradation.

Parts sintered from the clays and kaolins shown in section 1, with their temperature-dependent permittivity curves and non-linear current–voltage characteristics.

Produced by pyrolysis of the husks and hulls shown in section 1, with measured specific surface area and mass conversion yield.

I–V curve traced in real time, displayed side by side with that of an imported module under identical illumination.

Powers a visible load; state of charge, voltage and accumulated cycle count are displayed continuously.

Measurable voltage and power as a function of temperature difference, with the effective efficiency set against the Carnot limit.

Spark gap or Tesla coil showing clamping by a ZnO varistor: the same physics that protects a distribution line in a thunderstorm.

Instantaneous flow, head and electrical power; the efficiency curve builds up as the visitor varies the flow rate.

The fixed bed, the pyrolysis front and the syngas flame are visible; gas composition is displayed continuously.

Inverters, chargers, phone boards, medical equipment. Each item carries its failure analysis: electrochemical corrosion, electromigration, solder fatigue, lightning surge.

Displayed at eye level next to the object they come from: electrolytic migration dendrite, joint crack, electromigration void.

Boards undergoing accelerated ageing behind a window, with the running temperature–humidity cycle profile and cumulative test time.

Voltage, resistance, temperature, mass, displayed with their traceability certificates and the calibration chain linking them to the International System of Units.

Galvanometer, Wheatstone bridge, spectroscope, set against their digital successors: the measurement method has not changed, only the resolution has.

Four-point-probe measurement on a sample of the visitor's choice and a solar radiation sensor reading, with the uncertainty shown on every value.

Band structure of a material derived from an ore shown in section 1, charge transport at an interface, hydrological regime of a mini-hydro site.

A humid-tropical qualification standard, printed and bound, placed beside the test bench that produced it.

Shown with the partner's name and the development stage reached, from laboratory bench to pre-production.

The authors of the results our twelve areas rest on, presented through their scientific contribution rather than their biography.

From the first hydroelectric schemes to today's grids; opposite each milestone, the physics questions it left open.