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Boron nitride-based composite ceramic for thin-strip continuous casting side sealing plate and preparation method of boron nitride-based composite ceramic
The invention discloses boron nitride-based composite ceramic for a thin-strip continuous casting side sealing plate and a preparation method of the boron nitride-based composite ceramic. According to the technical scheme, the preparation method comprises the following steps: mixing elemental Si powder, h-BN powder, elemental Ti powder and a tempering agent to obtain mixed powder; placing the mixed powder, absolute ethyl alcohol and ball milling beads in a high-speed ball mill for ball milling to obtain slurry; drying and screening the slurry to obtain a screened material; placing the hot-pressing mold I with the sieved material in a hot-pressing sintering furnace, carrying out heat preservation and pressure maintaining, furnace cooling and pressure relief in nitrogen under the pressure of 10-30 MPa and the temperature of 1300-1450 DEG C to obtain a pre-sintered side sealing plate, placing the hot-pressing mold II with the pre-sintered side sealing plate in the hot-pressing sintering furnace, carrying out heat preservation and pressure maintaining in an inert atmosphere under the pressure of 100-200 MPa and the temperature of 1400-1500 DEG C, and carrying out furnace cooling and pressure relief to obtain a pre-sintered side sealing plate; and preparing the boron nitride-based composite ceramic for the thin-strip continuous casting side sealing plate. The prepared product has the characteristics of low heat conductivity, good corrosion resistance, high high-temperature bending strength and long service life.
本发明公开一种薄带连铸侧封板用氮化硼基复合陶瓷及其制备方法。其技术方案是：将单质Si粉体、h‑BN粉体、单质Ti粉体和调质剂混合，得混合粉体；将混合粉体与无水乙醇、球磨珠置于高速球磨机中球磨，得浆料；将浆料干燥和筛分，得筛分料；将放有筛分料的热压模具I置于热压烧结炉中，于10～30MPa、1300～1450℃和氮气中保温保压，随炉降温和泄压，得预烧结侧封板，再将放有预烧结侧封板的热压模具II置于热压烧结炉中，于100～200MPa、1400～1500℃和惰性气氛中保温保压，随炉降温和泄压，制得薄带连铸侧封板用氮化硼基复合陶瓷。本发明所制制品具有热导率低、抗侵蚀性好、高温弯曲强度高和使用寿命长的特点。
Boron nitride-based composite ceramic for thin-strip continuous casting side sealing plate and preparation method of boron nitride-based composite ceramic
The invention discloses boron nitride-based composite ceramic for a thin-strip continuous casting side sealing plate and a preparation method of the boron nitride-based composite ceramic. According to the technical scheme, the preparation method comprises the following steps: mixing elemental Si powder, h-BN powder, elemental Ti powder and a tempering agent to obtain mixed powder; placing the mixed powder, absolute ethyl alcohol and ball milling beads in a high-speed ball mill for ball milling to obtain slurry; drying and screening the slurry to obtain a screened material; placing the hot-pressing mold I with the sieved material in a hot-pressing sintering furnace, carrying out heat preservation and pressure maintaining, furnace cooling and pressure relief in nitrogen under the pressure of 10-30 MPa and the temperature of 1300-1450 DEG C to obtain a pre-sintered side sealing plate, placing the hot-pressing mold II with the pre-sintered side sealing plate in the hot-pressing sintering furnace, carrying out heat preservation and pressure maintaining in an inert atmosphere under the pressure of 100-200 MPa and the temperature of 1400-1500 DEG C, and carrying out furnace cooling and pressure relief to obtain a pre-sintered side sealing plate; and preparing the boron nitride-based composite ceramic for the thin-strip continuous casting side sealing plate. The prepared product has the characteristics of low heat conductivity, good corrosion resistance, high high-temperature bending strength and long service life.
本发明公开一种薄带连铸侧封板用氮化硼基复合陶瓷及其制备方法。其技术方案是：将单质Si粉体、h‑BN粉体、单质Ti粉体和调质剂混合，得混合粉体；将混合粉体与无水乙醇、球磨珠置于高速球磨机中球磨，得浆料；将浆料干燥和筛分，得筛分料；将放有筛分料的热压模具I置于热压烧结炉中，于10～30MPa、1300～1450℃和氮气中保温保压，随炉降温和泄压，得预烧结侧封板，再将放有预烧结侧封板的热压模具II置于热压烧结炉中，于100～200MPa、1400～1500℃和惰性气氛中保温保压，随炉降温和泄压，制得薄带连铸侧封板用氮化硼基复合陶瓷。本发明所制制品具有热导率低、抗侵蚀性好、高温弯曲强度高和使用寿命长的特点。
Boron nitride-based composite ceramic for thin-strip continuous casting side sealing plate and preparation method of boron nitride-based composite ceramic
薄带连铸侧封板用氮化硼基复合陶瓷及其制备方法
YU CHAO (author) / CHEN YUFENG (author) / DENG CHENGJI (author) / YAN HAO (author) / DING JUN (author) / DONG BO (author) / ZHU HONGXI (author)
2024-01-05
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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Boron nitride multi-phase ceramic side sealing plate and preparation method thereof
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