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Hot-pressed sintered Ba4Ti13O30 ceramic and preparation method thereof
The invention relates to the field of materials, and discloses a hot-pressed sintered Ba4Ti13O30 ceramic material and a preparation method thereof. The preparation method comprises the steps: mixing barium carbonate powder and titanium dioxide powder in proportion, and synthesizing barium titanate powder in a sintering furnace through solid-phase reaction; mixing barium titanate powder and titanium dioxide according to a stoichiometric ratio, and carrying out ball milling, drying and sieving to obtain uniformly mixed fine materials; adding PVA into the fine material and granulating to obtain powder particles; pouring the powder particles into a metal mold, discharging glue after pressure forming is conducted, and thus obtaining a Ba4Ti13O30 precursor biscuit; placing the Ba4Ti13O30 precursor biscuit in an aluminum oxide mold, and fully laying the periphery of the biscuit with burying powder; then putting the biscuit on a pressure column, and carrying out pressure sintering, so as to preliminarily obtain cylindrical Ba4Ti13O30 ceramic; and cutting the obtained Ba4Ti13O30 ceramic on the surface and the cross section by using a diamond wire to respectively obtain two types of Ba4Ti13O30 ceramic samples which are parallel to and perpendicular to the hot pressing direction. According to the Ba4Ti13O30 ceramic provided by the invention, the grains have certain preferred orientation while the Ba4Ti13O30 ceramic keeps relatively good density.
本发明涉及材料领域，公开了一种热压烧结Ba4Ti13O30陶瓷材料及其制备方法。制备方法包括：将碳酸钡粉体与二氧化钛粉体按比例混合，通过固相反应在烧结炉中合成钛酸钡粉体；将钛酸钡粉体和和二氧化钛按照化学计量比混合，球磨、烘干、过筛得到混合均匀的细料；在细料中加入PVA进行造粒，得到粉体颗粒；将粉粒倒入金属模具内，加压成型后进行排胶，获得Ba4Ti13O30前驱物素坯；将所述Ba4Ti13O30前驱物素坯放在氧化铝模具中，素坯四周铺满掩埋粉。然后放上压力柱进行加压烧结，初步得到圆柱形的Ba4Ti13O30陶瓷；将上述得到的Ba4Ti13O30陶瓷用金刚石线在表面与截面进行切割，分别得到与热压方向平行和垂直的两种Ba4Ti13O30陶瓷样品。本发明提供的Ba4Ti13O30陶瓷在保持较好致密度的同时，晶粒具有一定的择优取向。
Hot-pressed sintered Ba4Ti13O30 ceramic and preparation method thereof
The invention relates to the field of materials, and discloses a hot-pressed sintered Ba4Ti13O30 ceramic material and a preparation method thereof. The preparation method comprises the steps: mixing barium carbonate powder and titanium dioxide powder in proportion, and synthesizing barium titanate powder in a sintering furnace through solid-phase reaction; mixing barium titanate powder and titanium dioxide according to a stoichiometric ratio, and carrying out ball milling, drying and sieving to obtain uniformly mixed fine materials; adding PVA into the fine material and granulating to obtain powder particles; pouring the powder particles into a metal mold, discharging glue after pressure forming is conducted, and thus obtaining a Ba4Ti13O30 precursor biscuit; placing the Ba4Ti13O30 precursor biscuit in an aluminum oxide mold, and fully laying the periphery of the biscuit with burying powder; then putting the biscuit on a pressure column, and carrying out pressure sintering, so as to preliminarily obtain cylindrical Ba4Ti13O30 ceramic; and cutting the obtained Ba4Ti13O30 ceramic on the surface and the cross section by using a diamond wire to respectively obtain two types of Ba4Ti13O30 ceramic samples which are parallel to and perpendicular to the hot pressing direction. According to the Ba4Ti13O30 ceramic provided by the invention, the grains have certain preferred orientation while the Ba4Ti13O30 ceramic keeps relatively good density.
本发明涉及材料领域，公开了一种热压烧结Ba4Ti13O30陶瓷材料及其制备方法。制备方法包括：将碳酸钡粉体与二氧化钛粉体按比例混合，通过固相反应在烧结炉中合成钛酸钡粉体；将钛酸钡粉体和和二氧化钛按照化学计量比混合，球磨、烘干、过筛得到混合均匀的细料；在细料中加入PVA进行造粒，得到粉体颗粒；将粉粒倒入金属模具内，加压成型后进行排胶，获得Ba4Ti13O30前驱物素坯；将所述Ba4Ti13O30前驱物素坯放在氧化铝模具中，素坯四周铺满掩埋粉。然后放上压力柱进行加压烧结，初步得到圆柱形的Ba4Ti13O30陶瓷；将上述得到的Ba4Ti13O30陶瓷用金刚石线在表面与截面进行切割，分别得到与热压方向平行和垂直的两种Ba4Ti13O30陶瓷样品。本发明提供的Ba4Ti13O30陶瓷在保持较好致密度的同时，晶粒具有一定的择优取向。
Hot-pressed sintered Ba4Ti13O30 ceramic and preparation method thereof
热压烧结Ba4Ti13O30陶瓷及其制备方法
JIN DENGREN (author) / ZHU SAINAN (author) / CHEN GUOJUN (author)
2021-08-06
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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