Fabrication of in-situ Ti-Cx-N1−x phase enhanced porous Si3N4 absorbing composites by gel casting

Efficient Preparation of BNNSs and Their Performance Study of Reinforced Porous Si3N4 Composites by Gel Casting

“…The jar was ball milled on a planetary ball mill at 300 r/min for 6 h to produce the mixed slurry. Specific gel casting process and green body drying process parameters can be referred to in previous work . The dried green body is drained for 2 h in an air atmosphere of 500 °C to discharge the organic matter.…”

“…Hydrochloric acid (HCl, AR, Sinopharm Group Chemical reagent Co., LTD) was devoted to pickling the products of ammonia nitriding to obtain BNNSs. Specific information on the raw materials used for the preparation of porous Si 3 N 4 composites by the gel casting process is detailed in previous studies …”

“…To calculate the theoretical density of the composites, the densities of Si 3 N 4 , Al 2 O 3 , Y 2 O 3 , and BNNSs were assumed to be 3.2 g/cm 3 , 3.97 g/cm 3 , 5.01 g/cm 3 , and 2.1 g/cm 3 , respectively. 9,33 Before testing the dielectric properties of the samples, further processing of the samples is required. First, all of the samples are further ground to a thickness of about 3.4 mm.…”

“…Specific information on the raw materials used for the preparation of porous Si 3 N 4 composites by the gel casting process is detailed in previous studies. 33…”

“…Specific gel casting process and green body drying process parameters can be referred to in previous work. 33 The dried green body is drained for 2 h in an air atmosphere of 500 °C to discharge the organic matter. Next, the polymer-free green body was placed inside the alumina crucible, immersed in the powder bed containing h-BN, and initiated the sintering process.…”