A microkernel implements all drivers as user-space programs, and implements core features like IPC in the kernel itself. A monolithic kernel, however, implements the drivers as a part of the kernel...
The main difference between porcelain and fine bone china is the inclusion of up to 50 percent bone ash in the porcelain mixture that makes up bone china. China is also typically fired at a lower temperature than porcelain, which is double-fired at very high temperatures. Keep Learning.
Fireclay, on the other hand, is also molded from a clay and mineral mixture, but it is fired at a higher temperature than vitreous china/porcelain which gives it greater resistance to heat - making it ideal for use in kitchen sinks.