尾-Sialon powders were synthesized by sol–gel and microwave carbothermal reduction.
The formation temperature is as low as 1250 °C.
Ultrafine 尾-Sialon powders were granular with primary size of 69 nm.
The relative content of 尾-Sialon was predicted by BP ANNs.
The values calculated by the ANNs matched well with the experimental ones.