以YF3为烧结助剂制备h-BN/AlN复相陶瓷，随着烧结温度的升高，h

Using YF3 as a sintering aid to prepare h-BN/AlN multiphase ceramics, as the sintering temperature increases, the water absorption and bending strength of h-BN/AlN multiphase ceramics gradually decrease; The increase first increases and then decreases; the dielectric constant of the complex ceramic at 1 MHz increases with the increase of the sintering temperature, and the dielectric loss decreases. <br>The water absorption rate of h-BN/AlN composite ceramics gradually decreases with the increase of YF3 dosage, and the thermal diffusion coefficient increases first and then decreases. <br>The dielectric constant increases with the increase in the amount of YF3, while the dielectric loss and bending strength decrease first and then increase. <br>When the sintering temperature is 1850 ℃ and the amount of YF3 is 3 wt.%, the water absorption rate of h-BN/AlN multiphase ceramics gradually decreases with the extension of the holding time. The holding time was extended from 1 h to 3 h, the thermal diffusion coefficient increased from 40.844 mm2·s-1 to 44.901 mm2·s-1, the dielectric constant at 1 MHz was reduced from 7.96 to 7.79, and the dielectric loss was from 8.42 × 10 -4 decreased to 3.89 × 10-4, and the bending strength increased from 282 MPa to 301 MPa. <br>h-BN increased from 0 to 35 vol.%, the water absorption rate of h-BN/AlN composite ceramics increased from 0.06 ‰ to 0.95 ‰, and the thermal diffusion coefficient decreased from 53.827 mm2·s-1 to 23.676 mm2·s-1 , The dielectric constant at 1 MHz was reduced from 8.93 to 6.91, the dielectric loss was reduced from 19.61 × 10-4 to 8.42 × 10-4 and then increased to 17.16 × 10-4, and the bending strength was reduced from 368 MPa to 229 MPa .

With YF3 as the sintering additive, h-BN/AlN complex ceramic sintered, with the increase of sintering temperature, the water absorption rate and bending strength of h-BN/AlN complex ceramic gradually decreased;<br>The absorbent rate of h-BN/AlN complex ceramic decreased gradually with the increase of YF3, and the thermal diffusion coefficient increased first and then decreased.<br>The dielectric constant increases with the increase of YF3 usage, while the dielectric loss and bendstrength decrease first and then increase.<br>With a sintering temperature of 1850 degrees C and a YF3 dosage of 3 wt.%, the water absorption rate of h-BN/AlN complex ceramics decreases gradually with the extension of the insulation time. The insulation time was extended from 1 h to 3 h, the thermal diffusion coefficient was raised from 40.844 mm2-s-1 to 44.901 mm2-s-1, the dielectric constant at 1 MHz was reduced from 7.96 to 7.79, the dielectric loss was reduced from 8.42 to 10-4 to 3.89 x 10-4, and the resistance strength was raised from 282 m2 to MPa30.<br>h-BN increased from 0 to 35 vol.%, h-BN/AlN complex ceramic water absorption increased from 0.06 to 0.95 per cent, thermal diffusion coefficient decreased from 53.827 mm2-s-1 to 23.676 mm2-1, at 1 MHz The dielectric constant was reduced from 8.93 to 6.91, the dielectric loss was reduced from 19.61 to 10-4 to 17.16 x 10-4, and the bending strength was reduced from 368 MPa to 229 MPa.

With the increase of sintering temperature, the water absorption and bending strength of h-BN / AlN composite ceramics decrease gradually; the thermal diffusivity increases first and then decreases with the increase of sintering temperature; the dielectric constant of composite ceramics at 1 MHz increases with the increase of sintering temperature, and the dielectric loss decreases.<br>The water absorption of h-BN / AlN composite ceramics decreased with the increase of yf3 content, and the thermal diffusivity increased first and then decreased.<br>The dielectric constant increased with the increase of yf3 content, while the dielectric loss and bending strength decreased first and then increased.<br>When the sintering temperature is 1850 ℃ and the amount of yf3 is 3 wt.%, the water absorption of h-BN / AlN composite ceramics decreases with the prolongation of holding time. When the holding time is extended from 1 h to 3 h, the thermal diffusivity increases from 40.844 mm2 · S-1 to 44.901 mm2 · s-1, the dielectric constant decreases from 7.96 to 7.79 at 1 MHz, the dielectric loss decreases from 8.42 × 10-4 to 3.89 × 10-4, and the bending strength increases from 282 MPa to 301 MPa.<br>The water absorption of h-BN / AlN composite ceramics increased from 0.06 ‰ to 0.95 ‰, the thermal diffusivity decreased from 53.827 mm2 · S-1 to 23.676 mm2 · s-1, the dielectric constant decreased from 8.93 to 6.91 at 1 MHz, the dielectric loss first decreased from 19.61 × 10-4 to 8.42 × 10-4, then increased to 17.16 × 10-4, and the bending strength decreased from 368 MPa to 229 MPa.<br>