Manufacture method for the fluoride sintered body of neutron ray decelerating material

Manufacture method for the fluoride sintered body of neutron ray decelerating material

  • CN 104,640,824 B
  • Filed: 05/27/2014
  • Issued: 03/20/2018
  • Est. Priority Date: 07/08/2013
  • Status: Active Grant
First Claim
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1. A kind of 1. manufacture method of fluoride sintered body for neutron ray decelerating material, it is characterised in that the manufacturerMethod is by the MgF of the polycrystalline structure of densification2The heap density that sintered body is formed is in 2.90g/cm3Above, 3.07g/cm3Hereinafter, andWith bending strength in more than 10MPa, the fluorine for neutron ray decelerating material of mechanical strength of the Vickers hardness more than 71The manufacture method of compound sintered body, including:

  • By high-purity MgF2Raw material Crushing of Ultrafine, add the step of 0.1~1wt% sintering aids mix;

    Using single shaft pressuring machine, the step of being pressed in more than 5MPa with shaping and be molded;

    Using isostatic cool pressing (CIP) machine, the step of being pressed in more than 5MPa with shaping and be molded;

    In atmospheric environment, in 550~600 DEG C of temperature ranges, the interim sintering step under the conditions of 4~10 hours;

    In inert gas environment, in 750~840 DEG C of temperature ranges, the heating stepses of 5~12 hours;

    In environment identical with preceding step, in 900~1100 DEG C of temperature ranges, heat 0.5~3 hour, form dense constructionMgF2The formal sintering step of sintered body.

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