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Compact high-strength high-modulus cordierite ceramic as well as preparation method and application thereof
The invention discloses a compact high-strength high-modulus cordierite ceramic as well as a preparation method and application thereof. The cordierite ceramic is prepared by the following steps: mixing high-purity cordierite powder, mullite whiskers, alumina whiskers, a thermal expansion coefficient regulator and boric oxide, granulating, carrying out compression molding on the granulated powder, carrying out cold isostatic pressing treatment, dumping and high-temperature and normal-pressure sintering to obtain the cordierite ceramic, and carrying out hot isostatic pressing sintering to obtain the cordierite ceramic, the hot isostatic pressing sintering temperature is controlled to be 1200-1300 DEG C, the heat preservation time is 0.5-4 h, and the applied pressure is 100-300 MPa; the high-purity cordierite powder with the cordierite crystal phase content larger than or equal to 99.5% is adopted, hot isostatic pressing and other measures are adopted, the mechanical property and the thermal property of the cordierite ceramic are both considered, the specific stiffness is larger than or equal to 59.0 N/tex, and the room temperature expansion coefficient is smaller than or equal to 3 * 10 <-8 > DEG C <-1 >.
本发明公开了一种致密高强度高模量堇青石陶瓷及其制备方法与应用；该堇青石陶瓷由高纯堇青石粉体、莫来石晶须、氧化铝晶须、热膨胀系数调节剂以及氧化硼混合后造粒，将造粒所得粉体压制成型后进行冷等静压处理，排胶，高温常压烧结，得堇青石陶瓷，再经热等静压烧结得到；控制热等静压烧结温度为1200～1300℃，保温时间为0.5～4h，施加压力为100～300MPa；本发明采用堇青石晶相含量≥99.5％的高纯堇青石粉体以及热等静压等措施，实现了堇青石陶瓷兼顾力学性能和热学性能，比刚度≥59.0N/tex，室温膨胀系数≤3×10‑8℃‑1。
Compact high-strength high-modulus cordierite ceramic as well as preparation method and application thereof
The invention discloses a compact high-strength high-modulus cordierite ceramic as well as a preparation method and application thereof. The cordierite ceramic is prepared by the following steps: mixing high-purity cordierite powder, mullite whiskers, alumina whiskers, a thermal expansion coefficient regulator and boric oxide, granulating, carrying out compression molding on the granulated powder, carrying out cold isostatic pressing treatment, dumping and high-temperature and normal-pressure sintering to obtain the cordierite ceramic, and carrying out hot isostatic pressing sintering to obtain the cordierite ceramic, the hot isostatic pressing sintering temperature is controlled to be 1200-1300 DEG C, the heat preservation time is 0.5-4 h, and the applied pressure is 100-300 MPa; the high-purity cordierite powder with the cordierite crystal phase content larger than or equal to 99.5% is adopted, hot isostatic pressing and other measures are adopted, the mechanical property and the thermal property of the cordierite ceramic are both considered, the specific stiffness is larger than or equal to 59.0 N/tex, and the room temperature expansion coefficient is smaller than or equal to 3 * 10 <-8 > DEG C <-1 >.
本发明公开了一种致密高强度高模量堇青石陶瓷及其制备方法与应用；该堇青石陶瓷由高纯堇青石粉体、莫来石晶须、氧化铝晶须、热膨胀系数调节剂以及氧化硼混合后造粒，将造粒所得粉体压制成型后进行冷等静压处理，排胶，高温常压烧结，得堇青石陶瓷，再经热等静压烧结得到；控制热等静压烧结温度为1200～1300℃，保温时间为0.5～4h，施加压力为100～300MPa；本发明采用堇青石晶相含量≥99.5％的高纯堇青石粉体以及热等静压等措施，实现了堇青石陶瓷兼顾力学性能和热学性能，比刚度≥59.0N/tex，室温膨胀系数≤3×10‑8℃‑1。
Compact high-strength high-modulus cordierite ceramic as well as preparation method and application thereof
一种致密高强度高模量堇青石陶瓷及其制备方法与应用
RAO PINGGEN (author) / CHEN JINXUAN (author) / LI ZIFAN (author) / LYU MING (author) / YU SHUYAN (author)
2024-09-17
Patent
Electronic Resource
Chinese
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