Preparation of the high-performance porcelain heating parts with automatic temperature-control

[0010] Example 1, as shown in Figures 1 and 2, its formula is 66% of high-purity, ultra-fine aluminum nitride powder with an average particle size of less than 0.5 microns, an oxygen content of less than 0.84%, and an aluminum nitride content greater than 99%, adding 25% nano-nitrogen Aluminum powder and additive 5% YF 3 , 4% CaF 2 ; After 60 hours of ball milling the raw material nitrogen protection cylinder, the mill was passed through a 60-mesh sieve, wherein the material of the ball mill tank was polyurethane, and the grinding balls were zirconia balls, material: ball = 1: 3, and 0.2% oleic acid was added before ball milling; sieve Add 0.35% PVA and 0.25% emulsified paraffin to the material, mix and granulate under nitrogen protection; 220-250 Mf high pressure molding and insert heating resistance molybdenum wire (4) in the middle of the powder, keep warm at 1880°C for 6 hours under high temperature flowing nitrogen atmosphere protection Sintered into an electric heating ...

[0011] Example two, as shown in Figures 1 and 2, its formula is 76.2% of high-purity, ultra-fine aluminum nitride powder with an average particle size of less than 0.5 microns, an oxygen content of less than 0.84%, and an aluminum nitride content greater than 99%, adding 20% ​​nano-nitrogen Aluminum powder and additive 3.8% Y 2 o 3 ; After 60 hours of ball milling the raw material nitrogen protection cylinder, the mill was passed through a 60-mesh sieve, wherein the material of the ball mill tank was polyurethane, and the grinding balls were zirconia balls, material: ball = 1: 3, and 0.2% oleic acid was added before ball milling; sieve Add 0.30% PVA and 0.20% emulsified paraffin to the material, mix and granulate under nitrogen protection; 220-250 Mf high pressure molding and insert heating resistance tungsten wire (4) in the middle of the powder, keep warm at 1850°C for 4.5 hours under high temperature flowing nitrogen atmosphere protection Hot pressing and sintering into an...

[0012] Example three, as shown in Figures 1 and 2, its formula is 70% of high-purity, ultra-fine aluminum nitride powder with an average particle size less than 0.5 micron, oxygen content less than 0.84%, and aluminum nitride content greater than 99%, adding 25% nano-nitrogen Aluminum powder and additive 3% Y 2 o 3 , 2% CaF 2 ; After 60 hours of ball milling the raw material nitrogen protection cylinder, the mill was passed through a 60-mesh sieve, wherein the material of the ball mill tank was polyurethane, and the grinding balls were zirconia balls, material: ball = 1: 3, and 0.2% oleic acid was added before ball milling; sieve Add 0.30% PVA and 0.20% emulsified paraffin to the material, mix and granulate under nitrogen protection; 220-250 Mf high pressure molding and insert heating resistance molybdenum wire (4) in the middle of the powder, keep warm at 1850 ° C for 6 hours and protect under high temperature flowing nitrogen atmosphere Hot pressing and sintering into an e...