I want to share my design that seems to be very easy to build.
It look like it has good potential as well.
If you have all the parts, it can be built in 10 minutes without any special tools.
It is consisted from 29cm 99,7% Al2O3, OD=10mm, ID=5mm.
Inside there is 32AWG Nickel wire coil wrapped on the tube (can be rod).
Swagelok fittings are used for powering the coil, the connection is mechanical through washer with OD<=10mm, in my case it is just a part of old ball bearing.
Coil has 4-8 Ohms and require less than 100 Watts for high temperatures.
As a fuel you can use LiAlH4 and possibly Lithium. It can be putted inside the tube or just somewhere around the heater.
In my experiments the coil is able to trap electrostatically LiAlH4 around the surface.
Here are some photos.