A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Multiphase ceramic material with high infrared transmittance and preparation method thereof
The invention relates to the technical field of ceramic materials, in particular to a multiphase ceramic material with high infrared transmittance and a preparation method of the multiphase ceramic material. The preparation method comprises the following steps: preparing Gd2O3-MgO nano composite phase powder; mixing the Gd2O3-MgO nano-composite powder, a LiNO3 solution and a NH4F solution, then stirring, then standing for layering, and removing supernatant liquid to obtain a precipitate; calcining the precipitate for 3 to 5 hours at the temperature of 300 to 500 DEG C under the protection of an inert atmosphere, so as to obtain LiF-coated Gd2O3-MgO nano complex phase powder; the LiF-coated Gd2O3-MgO nano composite phase powder is subjected to forming, sintering and processing in sequence, and the composite phase ceramic material is obtained. According to the invention, LiF is added into the Gd2O3-MgO nano complex-phase powder, the LiF is used as a sintering aid, and the sintering temperature of the complex-phase ceramic material is reduced to be lower than 1250 DEG C, so that the change of the crystal form of Gd2O3 is avoided, and the infrared transmittance of the material is improved. Meanwhile, LiF with stable chemical properties is used as a coating layer, so that the problem that MgO is extremely easy to absorb water after being in contact with air is avoided, the reduction of absorption of hydroxyl in the composite ceramic material is facilitated, and the infrared transmittance of the composite ceramic material is improved.
本发明涉及陶瓷材料技术领域，尤其涉及一种具有高红外透过率的复相陶瓷材料及其制备方法。制备方法包括：制备Gd2O3‑MgO纳米复相粉体；将Gd2O3‑MgO纳米复相粉体、LiNO3溶液和NH4F溶液混合，然后进行搅拌，随后静置分层，除去上层清液，得到沉淀；将沉淀在惰性气氛保护下于300～500℃煅烧3～5h，得到LiF包覆的Gd2O3‑MgO纳米复相粉体；将LiF包覆的Gd2O3‑MgO纳米复相粉体依次进行成型、烧结、加工，得到复相陶瓷材料。本发明在Gd2O3‑MgO纳米复相粉体中加入LiF，LiF作为烧结助剂，将复相陶瓷材料的烧结温度降低至低于1250℃，避免了Gd2O3晶型的改变，提升材料的红外透过率。化学性质稳定的LiF同时作为包覆层，避免MgO与空气接触后极易吸水的问题，有利于减少复相陶瓷材料中羟基的吸收，提升复相陶瓷材料的红外透过率。
Multiphase ceramic material with high infrared transmittance and preparation method thereof
The invention relates to the technical field of ceramic materials, in particular to a multiphase ceramic material with high infrared transmittance and a preparation method of the multiphase ceramic material. The preparation method comprises the following steps: preparing Gd2O3-MgO nano composite phase powder; mixing the Gd2O3-MgO nano-composite powder, a LiNO3 solution and a NH4F solution, then stirring, then standing for layering, and removing supernatant liquid to obtain a precipitate; calcining the precipitate for 3 to 5 hours at the temperature of 300 to 500 DEG C under the protection of an inert atmosphere, so as to obtain LiF-coated Gd2O3-MgO nano complex phase powder; the LiF-coated Gd2O3-MgO nano composite phase powder is subjected to forming, sintering and processing in sequence, and the composite phase ceramic material is obtained. According to the invention, LiF is added into the Gd2O3-MgO nano complex-phase powder, the LiF is used as a sintering aid, and the sintering temperature of the complex-phase ceramic material is reduced to be lower than 1250 DEG C, so that the change of the crystal form of Gd2O3 is avoided, and the infrared transmittance of the material is improved. Meanwhile, LiF with stable chemical properties is used as a coating layer, so that the problem that MgO is extremely easy to absorb water after being in contact with air is avoided, the reduction of absorption of hydroxyl in the composite ceramic material is facilitated, and the infrared transmittance of the composite ceramic material is improved.
本发明涉及陶瓷材料技术领域，尤其涉及一种具有高红外透过率的复相陶瓷材料及其制备方法。制备方法包括：制备Gd2O3‑MgO纳米复相粉体；将Gd2O3‑MgO纳米复相粉体、LiNO3溶液和NH4F溶液混合，然后进行搅拌，随后静置分层，除去上层清液，得到沉淀；将沉淀在惰性气氛保护下于300～500℃煅烧3～5h，得到LiF包覆的Gd2O3‑MgO纳米复相粉体；将LiF包覆的Gd2O3‑MgO纳米复相粉体依次进行成型、烧结、加工，得到复相陶瓷材料。本发明在Gd2O3‑MgO纳米复相粉体中加入LiF，LiF作为烧结助剂，将复相陶瓷材料的烧结温度降低至低于1250℃，避免了Gd2O3晶型的改变，提升材料的红外透过率。化学性质稳定的LiF同时作为包覆层，避免MgO与空气接触后极易吸水的问题，有利于减少复相陶瓷材料中羟基的吸收，提升复相陶瓷材料的红外透过率。
Multiphase ceramic material with high infrared transmittance and preparation method thereof
一种具有高红外透过率的复相陶瓷材料及其制备方法
SUN BINGHENG (author) / ZHANG YANG (author) / FAN JINTAI (author) / LU HAIFENG (author) / WU XINTAO (author) / HE TINGBO (author)
2024-11-26
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
Preparation method of MgAlON ceramic with high infrared transmittance
| European Patent Office | 2024
Nano multiphase infrared transparent ceramic material and preparation method thereof
| European Patent Office | 2022
High-transmittance transparent ceramic and preparation method thereof
| European Patent Office | 2022
Multiphase ceramic material and preparation method thereof
| European Patent Office | 2022
High-transmittance ceramic and preparation process thereof
| European Patent Office | 2024