稀有金属材料与工程
稀有金屬材料與工程
희유금속재료여공정
RARE METAL MATERIALS AND ENGINEERNG
2009年
z2期
458-461
,共4页
韩爽%蒋凯辉%唐军务%胡海峰
韓爽%蔣凱輝%唐軍務%鬍海峰
한상%장개휘%당군무%호해봉
2.5D SiO_(2f)/ SiO_2%溶胶-凝胶%力学性能%介电性能
2.5D SiO_(2f)/ SiO_2%溶膠-凝膠%力學性能%介電性能
2.5D SiO_(2f)/ SiO_2%용효-응효%역학성능%개전성능
2.5D SiO_(2f)/ SiO_2%sol-gel%mechanical properties%dielectric properties
采用溶胶-凝胶工艺制备2.5D SiO_(2f)/ SiO_2复合材料,并对工艺参数进行了优化.研究表明:以固含量为30.73 %的硅溶胶为浸渍浆料,采用微波干燥方式,烧结温度为900 ℃时制备的复合材料具有较好的性能.经过7个制备周期后,复合材料的密度为1.65 g/cm~3,此时弯曲强度最大,可达80.7 MPa;800 ℃下烧成的材料具有最大的剪切强度和断裂韧性,分别为56.6 MPa和3.5 MPa·m~(1/2).测得试样介电常数为3.4,较好的满足了天线罩材料的介电性能要求.
採用溶膠-凝膠工藝製備2.5D SiO_(2f)/ SiO_2複閤材料,併對工藝參數進行瞭優化.研究錶明:以固含量為30.73 %的硅溶膠為浸漬漿料,採用微波榦燥方式,燒結溫度為900 ℃時製備的複閤材料具有較好的性能.經過7箇製備週期後,複閤材料的密度為1.65 g/cm~3,此時彎麯彊度最大,可達80.7 MPa;800 ℃下燒成的材料具有最大的剪切彊度和斷裂韌性,分彆為56.6 MPa和3.5 MPa·m~(1/2).測得試樣介電常數為3.4,較好的滿足瞭天線罩材料的介電性能要求.
채용용효-응효공예제비2.5D SiO_(2f)/ SiO_2복합재료,병대공예삼수진행료우화.연구표명:이고함량위30.73 %적규용효위침지장료,채용미파간조방식,소결온도위900 ℃시제비적복합재료구유교호적성능.경과7개제비주기후,복합재료적밀도위1.65 g/cm~3,차시만곡강도최대,가체80.7 MPa;800 ℃하소성적재료구유최대적전절강도화단렬인성,분별위56.6 MPa화3.5 MPa·m~(1/2).측득시양개전상수위3.4,교호적만족료천선조재료적개전성능요구.
In this paper, 2.5D SiO_(2f)/ SiO_2 composites were fabricated by sol-gel method with 2.5D silica braid as reinforcement and high pure silicasol as slurry. The optimum parameters are as follows: silicasol of 30.73% as slurry, drying by microwave, sintering at temperature of 900 ℃. The density of composites can reach 1.65 g·cm~(-3), and the maximal flexural strength is 80.68 MPa. The maximum shear strength and fracture toughness are 56.6 MPa and 3.5 MPa·m~(1/2) when the specimen was sintered at 800 ℃. Dielectric properties of 2.5D SiO_(2f)/ SiO_2 composites were also tested. It is 3.4 at 5 GHz and can well meet the requirements of radome materials.
