Hot press sintering apparatus and press element

A hot press sintering apparatus comprising:

• a chamber;
• a mold member located in the chamber and including a mold space section to be filled with a raw material;
• a press member for pressing and processing the raw material in the mold member;
• upper and lower moving members to move the press member up and down;
• and
• a heating member for heating an interior of the chamber,
• wherein the mold member includes a first mold part and a second mold part inserted into the first mold part, the second mold part being formed with the mold space section;
• wherein the press member includes a press section adjacent to the mold space section and an adiabatic section disposed at the press section;
• wherein the adiabatic section has a thermal conductivity lower than a thermal conductivity of the press section;
• wherein the press section includes graphite, the graphite having an impurity with a concentration equal to or smaller than 20 parts per million (ppm);
• wherein the adiabatic section is formed with a composite material including a carbon fiber reinforced carbon composite material, and
• wherein the adiabatic section is positioned between the press section and the upper and lower moving members,
• wherein the composite material is woven in a vertical direction,
• wherein the composite material has a thermal conductivity equal to or smaller than 10 W/Mk,
• wherein a width of the adiabatic section is smaller than a distance between two outmost lateral sides of the upper moving member or than a distance between two outmost lateral sides of the lower moving member,
• wherein the adiabatic section includes a first part positioned at one surface of the press section and a second part surrounding a lateral side of the press section,
• wherein a thickness of the first part and a thickness of the second part are both in a range of 5 mm to 200 mm, and
• wherein the adiabatic section has a cap shape.