A zinc borate having a particular crystallite size and containing very little sodium components and a method of preparing the same. The zinc borate has a particular chemical composition, has a crystallite size of not smaller than 40 nm as found from diffraction peaks of indexes of planes of (020), (101) and (200) in the X-ray diffraction image (Cu-k&agr;) and contains sodium components in amounts of not larger than 100 ppm as measured by the atomic absorptiometric method.
一种具有特定晶粒尺寸且含有极少
钠成分的
锌硼酸盐及其制备方法。该
锌硼酸盐具有特定的
化学组成,其晶粒尺寸不小于40纳米,可以从X射线衍射图像(Cu-kα)的(020)、(101)和(200)平面的衍射峰中发现,并且
钠成分的含量不超过100 ppm,由原子吸收光谱法测量。