Given that Ti has a very high affinity for hydrogen, I thought it might be interesting to run a Parkhamov-type experiment with Ti rather than Ni. In this case I loaded 100 mg LiAlh4 and 1g 200 mesh Ti powder into a 0.188" OD stainless tube 2" in length. The ends were plugged with fused quartz wool. Then the SS tube was placed in a 0.25" OD alumina tube around which was wrapped 32 T of 0.032" Kanthal wire. The entire apparatus described above fits into a 38 mm OD fused quartz tube that has connections to DC power, vacuum, and H2. The quartz tube is capped on both ends by machined endpieces with radial O-ring seals. I have no trouble maintaining 1e-6 Torr or better vacuum under continuous pumping. The experimental protocol went as follows.
1. Evacuate cell at room temperature to 1e-6 Torr or better.
2. Introduce 20 Torr dry H2
3. Step the heater voltage from 0V to 35V in 5V increments. This yields heater power from 12W to 540W and cell temperatures from ~100C to 1100C.
4. Add/bleed H2 from external source as required to maintain a pressure of < 100 Torr (This is the limit of the Baratron). I wanted to ensure that the system operated at sub 1 atm pressure for safety reasons.
5. Record alumina tube surface temperature and Delta T from the airflow calorimeter vs. heater power. I used an IR thermometer to monitor the temperature of the alumina tube.
The first run showed no excess heat as compared to a Ni + LiAlH4 + H2 mixture. The results were also nearly identical to running with an empty (no Ni or LiAlH4) cell. No excess heat, and the calorimeter delta T closely matched values for an empty cell.
The second run produced something unexpected. At a 35V heater voltage the Kanthal suddenly burned out. This was surprising since a 35V heater voltage has previously yielded
surface temperatures of <1100 C maximum. I was not able to record the cell surface temperature at the time of burnout because of heavy sputtering on the interior of the quartz tube. Also, the calorimeter did not have time to reach a steady state.
Upon disassembling the cell it was obvious that the SS tube and its contents exceeded 1500C: see attached photo. So the question is whether the sudden increase in temperature was due to chemical or LENR causes. I'll repair the apparatus and repeat the protocol and see what happens.
Comments are welcome.