Sembiring, Simon and Simanjuntak, Wasinton and situmeang, rudy Structure and Microstructure Properties of Refractory Cordierite Prepared from Amorphous Rice Husk Silica by Periclace Addition. In: The 1st INTERNATIONAL CONFERENCE ON SCIENCE, MATHEMATICS, ENVIRONMENT AND EDUCATION, September 16-17, 2017, Best Western Premier, Solo City, Central Java, Indonesia..