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Method for preparing LiMgPO4 microwave ceramic material at low temperature in energy-saving manner
The invention discloses a method for preparing a LiMgPO4 microwave ceramic material at low temperature in an energy-saving manner. According to the method, LiMgPO4 is mixed with not more than 20 wt% of water or acetic acid to form a solid-liquid mixture, then a hot pressing method is adopted, and the mixture is densified into ceramic by adjusting a sintering temperature (ST), heat preservation time (T) and an applied pressure (P), wherein the ST is 150 DEG C, 200 DEG C, 250 DEG C or 300 DEG C; T is equal to 30 min, 60 min or 90 min; P is equal to 350 MPa or 600 MPa. The LiMgPO4 ceramic obtained through the method has a dielectric constant (epsilon) in a range of 5.1 to 6.5, a quality factor Q*f in a range of 3,600 GHz to 16,000 GHz, and a resonance frequency temperature coefficient (TCF) in a range of -46.1 ppm/DEG C to -59.5 ppm/DEG C. The LiMgPO4 microwave ceramic material prepared by the method can be used as a substrate, a resonant antenna and other electronic component materials in a microwave radio frequency system (such as a 5G/6G communication system) and the like. Compared with a conventional ceramic sintering (HTCC and LTCC) technology, the method has the advantages that the densification can be realized in a lower temperature range, and carbon emission and energy consumption in the preparation and processing process can also be reduced.
本发明公开一种低温节能制备LiMgPO微波陶瓷材料的方法，LiMgPO与不高于20wt％的水或者醋酸混合，形成固液混合物，再采用热压方法，通过调节烧结温度(ST)、保温时间(T)和施加压力(P)实现其致密化成陶瓷，其中：ST为150℃，200℃，250℃或300℃；T＝30min，60min或90min；P＝350MPa或600MPa；通过该方法获得的LiMgPO陶瓷，其介电常数(ε)范围为5.1～6.5，品质因数Q×f的范围为3,600GHz～16,000GHz，谐振频率温度系数(TCF)的范围为‑46.1ppm/℃～‑59.5ppm/℃。该方法制备的LiMgPO微波陶瓷材料在微波射频系统(例如5G/6G通讯系统)等中可以作为基片、谐振天线等电子元器件材料使用。相比于常规陶瓷烧结(HTCC与LTCC)技术，该方法不仅可以在较低的温度范围内实现致密化，还可以减少其制备加工过程中碳排放和能源消耗。
Method for preparing LiMgPO4 microwave ceramic material at low temperature in energy-saving manner
The invention discloses a method for preparing a LiMgPO4 microwave ceramic material at low temperature in an energy-saving manner. According to the method, LiMgPO4 is mixed with not more than 20 wt% of water or acetic acid to form a solid-liquid mixture, then a hot pressing method is adopted, and the mixture is densified into ceramic by adjusting a sintering temperature (ST), heat preservation time (T) and an applied pressure (P), wherein the ST is 150 DEG C, 200 DEG C, 250 DEG C or 300 DEG C; T is equal to 30 min, 60 min or 90 min; P is equal to 350 MPa or 600 MPa. The LiMgPO4 ceramic obtained through the method has a dielectric constant (epsilon) in a range of 5.1 to 6.5, a quality factor Q*f in a range of 3,600 GHz to 16,000 GHz, and a resonance frequency temperature coefficient (TCF) in a range of -46.1 ppm/DEG C to -59.5 ppm/DEG C. The LiMgPO4 microwave ceramic material prepared by the method can be used as a substrate, a resonant antenna and other electronic component materials in a microwave radio frequency system (such as a 5G/6G communication system) and the like. Compared with a conventional ceramic sintering (HTCC and LTCC) technology, the method has the advantages that the densification can be realized in a lower temperature range, and carbon emission and energy consumption in the preparation and processing process can also be reduced.
本发明公开一种低温节能制备LiMgPO微波陶瓷材料的方法，LiMgPO与不高于20wt％的水或者醋酸混合，形成固液混合物，再采用热压方法，通过调节烧结温度(ST)、保温时间(T)和施加压力(P)实现其致密化成陶瓷，其中：ST为150℃，200℃，250℃或300℃；T＝30min，60min或90min；P＝350MPa或600MPa；通过该方法获得的LiMgPO陶瓷，其介电常数(ε)范围为5.1～6.5，品质因数Q×f的范围为3,600GHz～16,000GHz，谐振频率温度系数(TCF)的范围为‑46.1ppm/℃～‑59.5ppm/℃。该方法制备的LiMgPO微波陶瓷材料在微波射频系统(例如5G/6G通讯系统)等中可以作为基片、谐振天线等电子元器件材料使用。相比于常规陶瓷烧结(HTCC与LTCC)技术，该方法不仅可以在较低的温度范围内实现致密化，还可以减少其制备加工过程中碳排放和能源消耗。
Method for preparing LiMgPO4 microwave ceramic material at low temperature in energy-saving manner
一种低温节能制备LiMgPO微波陶瓷材料的方法
CHEN JINRONG (author) / SONG KAIXIN (author) / LIU BING (author) / XU JUNMING (author) / GAO HUIFANG (author) / WU JUN (author)
2020-08-07
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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