CAJ | 학술논문

为了在较低温度下合成性能较好的β-SiAlON 粉体，先以正硅酸乙酯、无水氯化铝和二氯甲烷等为原料采用非水解溶胶－凝胶法合成前驱体凝胶，然后与炭黑和 CaF2混合后以碳热还原氮化法合成β-SiAlON 粉体，并采用 XRD 及 SEM研究了干凝胶预焙烧温度（300和500℃）、炭黑用量（n（C）n（Al）分别为6．501、3．251和2．751）、合成温度（1400、1450和1500℃）及添加3％（w）CaF2对粉体合成的影响。结果表明：在300℃下预焙烧能保持干凝胶的高活性；n（C）n（Al）＝6．501时β-SiAlON 合成率较高；提高合成温度和引入3％（w）CaF2能促进β-SiAlON 粉体的合成；合成的β-SiAlON 粉体平均粒径为150 nm。
위료재교저온도하합성성능교호적β-SiAlON 분체，선이정규산을지、무수록화려화이록갑완등위원료채용비수해용효－응효법합성전구체응효，연후여탄흑화 CaF2혼합후이탄열환원담화법합성β-SiAlON 분체，병채용 XRD 급 SEM연구료간응효예배소온도（300화500℃）、탄흑용량（n（C）n（Al）분별위6．501、3．251화2．751）、합성온도（1400、1450화1500℃）급첨가3％（w）CaF2대분체합성적영향。결과표명：재300℃하예배소능보지간응효적고활성；n（C）n（Al）＝6．501시β-SiAlON 합성솔교고；제고합성온도화인입3％（w）CaF2능촉진β-SiAlON 분체적합성；합성적β-SiAlON 분체평균립경위150 nm。
This work aims at synthesizing β-SiAlON powder with good properties at lower temperatures.Theβ-SiAlON powder was synthesized by carbonthermal reduction nitridation process,during which the precur-sor gel was synthesized by non-hydrolytic sol-gel method using tetraethoxysilane,anhydrous AlCl3 and di-chloromethane as main starting materials,followed by mixing with carbon black and CaF2 .The effects of precalcined temperatures of dry gel (without precalcination,300 and 500 ℃),carbon black dosages (n(C) n(Al)is 6.50 1,3.25 1 and 2.75 1),synthesis temperatures (1 400,1 450 and 1 500 ℃)and 3%CaF2 addition on the synthesis of the powder were studied by XRD and SEM.The results show that the pre-calcination at 300 ℃ can keep a high activity of the dry gel;β-SiAlON has a relatively higher yield rate in the case of n(C)n(Al)=6.50 1;higher synthesis temperature and 3% CaF2 addition can promote the synthe-sis of β-SiAlON powder;the average size of the powder is 150 nm.