구상 산화마그네슘 및 그 제조방법

• Main Authors: KONISHI TAKESHI, CHIKAZAWA TOMOAKI, OSAKI YOSHIHISA, MORITA YUKI, SAITO AKINORI, TAKEGAKI MARESHI
• Format: Patent
• Language: Korean
• Published: 16.10.2019
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS; INORGANIC CHEMISTRY; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

진구도가 높을 뿐만 아니라, 표면이 평활하고 내습성 및 충진성이 뛰어난 구상 산화마그네슘 및 그 제조방법의 제공. 본 발명은, 소성 후에 포함되는 붕소 및 철 함유량을 일정한 범위로 조정함으로써, 레이저 회절 산란식 입도 분포 측정에 의한 체적 기준의 누적 50% 입자 크기(D50)가 3∼200㎛라는 비교적 큰 입자 크기 범위이고, SEM 사진으로 읽어낼 수 있는 진구도가 1.00∼1.20로 진구도가 높으며, 또한 표면이 평활하고 내습성 및 충진성이 뛰어난 구상 산화마그네슘을 제공하는 것이다. 붕소 함유량이 300∼2000ppm임과 동시에, 철 함유량이 100∼1500ppm이라는 첨가량의 상승 효과로 소정의 구상 산화마그네슘이 제공된다. Provided are: a spherical magnesium oxide having not only high sphericity but also smooth surface and having excellent moisture resistance and excellent filling properties, and a method producing the same. In the present invention, by controlling the boron and iron contents of the calcined magnesium oxide to be in the respective predetermined ranges, there is provided a spherical magnesium oxide having a volume-based cumulative 50% particle diameter (D50), as measured by a laser diffraction/scattering particle size distribution measurement, in the range of from 3 to 200 μm, which is the range for a relatively large particle diameter, and a high sphericity of 1.00 to 1.20, as measured from viewing a SEM photomicrograph, as well as smooth surface, and having excellent moisture resistance and excellent filling properties. A predetermined spherical magnesium oxide is provided by virtue of the synergies obtained from the boron content of 300 to 2,000 ppm and the iron content of 100 to 1,500 ppm.