Methods of forming a ceramic component and a high temperature mold component for use therewith

A method of forming a ceramic component comprising:

• providing a high temperature mold comprising:
• a fixture having a receiving surface, the receiving surface configured to receive an unfired ceramic component;
• a support structure surrounding the fixture;
• a continuous high temperature membrane operable to cover the unfired ceramic component opposite the receiving surface of the fixture, the continuous high temperature membrane attached to the support structure and forming a compartment;
• and
• a high temperature loose media operable to cover the high temperature membrane, the high temperature loose media being adjacent to the support structure;
• placing the unfired ceramic core on the receiving surface of the fixture, the unfired ceramic core having a first surface and a second surface, the first surface of the unfired ceramic core adjacent to the receiving surface of the fixture;
• applying the continuous high temperature membrane to the second surface of the unfired ceramic component, wherein the high temperature membrane conforms to the second surface of the unfired ceramic component;
• covering the continuous high temperature membrane with the high temperature loose media, wherein the high temperature loose media is contained by the compartment formed by the support structure and high temperature membrane;
• and
• heating the unfired ceramic component to a firing temperature of about 800° C. to about 1500° C.