Hologram recording material, process for producing the same and hologram recording medium

A process for producing a hologram recording material comprising:

• a metal oxide containing at least Si and Zr as metals wherein a β-dicarbonyl compound is coordinated to Zr;
• and
• a photopolymerizable compound,
• the process comprising:
• mixing an alkoxide compound of Zr as a starting material with a β-dicarbonyl compound to set a mole ratio of the β-dicarbonyl compound to the Zr atom (β-dicarbonyl compound/Zr ratio) to 2.2/1 or more and 2.8/1 or less, thereby modifying the alkoxide compound of Zr with the β-dicarbonyl compound;
• mixing the alkoxide compound of Zr modified with the β-dicarbonyl compound with an alkoxide compound of Si to set a mole ratio of the Si atom to the Zr atom (Si/Zr ratio) to more than 1/1 and 1.15/1 or less;
• hydrolyzing the mixed alkoxide compounds to yield a precursor of a metal oxide;
• incorporating a photopolymerizable compound into the resultant system before, during or after the hydrolysis;
• and
• advancing a polycondensation reaction of the metal oxide precursor into which the photopolymerizable compound is incorporated.